(d) A.C. generator has slip rings while the D.C. generator has commentator. A permeable substance is one (a) which is a good conductor (6) which is a bad conductor (c) which is a strong magnet (d) through which the magnetic lines of force can pass very easily Ans: d . The pattern of the magnetic field produced by the straight current carrying conducting wire is, (a) in the direction opposite to the current, (b) in the direction parallel to the wire, ► (a) in the direction opposite to the current, 8. Which of the following is one piece of the evidence for an iron-nickel core in the center of the earth? Which of the following statements correctly describes sunspots and solar flares? Volcanic activity has brought samples to the surface. If magnetic field in certain region is given by B = (40i-18k)Wbm2 then the flux passes through 5 cm2 area loop will be If the magnetic field in region is given by B = 4i + 8k then the flux passing through a 5m2 area … ), Try to keep heavy-consumption electrical devices, like. It is one of the coolest cars on the road; The Tesla is the unit for magnetic induction field strength in the International System of Units (SI), formerly known as the mks (meter-kilogram-second) system. The factors on which one magnetic field strength produced by current carrying solenoids depends are, 19. In electric motor, to make the coil rotating continuously in the same direction, current is reversed in the coil after every half rotation by a device called. 47. Commercial electric motors do not use, (a) an electromagnet to rotate the armature, (b) effectively large number of turns of conducting wire in the current carrying coil, (c) a permanent magnet to rotate the armature, (d) a soft iron core on which the coil is wound, ► (c) a permanent magnet to rotate the armature. The multimeter will record a high resistance. minerals align themselves with the magnetic field of the Earth. 45. The function of an electrical circuit breaker is to “break” (that is, to discontinue) a circuit of electricity. Set thermal magnetic circuit breakers according to the manufacturer’s directions for safe and effective functioning. C) Ions migrate long distances. the detected light has a longer wavelength than at the source. Let’s take a closer look. Magnetic Effect of Electric Current Class 10 MCQ Question 1. the Great Rift Valley of East Africa the East Pacific Rise the San Andreas fault the Mid-Atlantic Ridge. Normal fault c. Strike slip fault d. Graben Ans: a 4. 51) Which of the following is associated with mid-ocean ridges? Both are storms resulting from magnetic and electrically-charged particle activity. The magnetic field near a long straight wire is described by. (a) Magnetic field lines form a continuous closed curve. These are circuit breakers which utilize two components to detect electrical faults. Transactions. Much more seriously, it can endanger you and your household, with the risk of electric shock, electrocution, or, In American homes today, thermal magnetic. (c) parallel inside the solenoid and circular at the ends. The direction of the magnetic field is, (a) Mechanical energy into electrical energy, (d) Electrical energy into mechanical energy, ► (d) Electrical energy into mechanical energy, 16. Which of the following factors affect the strength of force experience by a current carrying conduct in a uniform magnetic field? 7. (b) Magnetic field line do not interest each other. This paper presents a laboratory setup for testing and experimental verification of fault detection methods based on contactless measurement of power line magnetic field. What should be the core of an electromagnet? 36. ► (c) parallel inside the solenoid and circular at the ends. b) The saturation voltage V CE for germanium transistor is more than silicon transistor. Which of the following properties of a proton can change when it moves freely in a, 10. Which of the following statement is true? The different types of the electrical fault are explained below: Single Phase to Ground Fault – It is also called a line-to-ground fault. it signifies a source that is moving towards us. Which one of the following plates has travelled maximum distance a. Pacific plate b. African plate c. Indian plate d. North American plate Ans: c 3. If the answer is no, you may be having an open circuit. Q.3 Find the odd one in the following group of words. The diagram shows a portion of the Earth's oceanic crust in the vicinity of the mid-Atlantic ridge. Flares are outbursts of shorter duration, and send out UV light and X-rays. The Gauss Is A Common Alternate Unit. A.C generator works on the principle of, (a) force experience by a conductor in magnetic field. When A Magnetic Field Is Specified It Will Be Given In Either The Unit Of Teslas (T) Or Gauss (G). The main advantage of A.C power transmission over D.C power transmission over’ long distance is, (a) AC transmit without much loss of energy, ► (a) AC transmit without much loss of energy. A positive charge is moving upwards in a magnetic field directed towards north. B) Ions readily combine. Circuit Breaker Purpose. Electrical surges can cause short-circuiting, which may seriously damage your valuable electrical appliances (such as a clothes dryer or an air conditioner) or large electronics (think DVD player or desktop computer). To convert an AC generator into DC generator, (a) split-ring type commutator must be used, (c) a stronger magnetic field has to be used, (d) a rectangular wire loop has to be used, ► (a) split-ring type commutator must be used, 42. Are only interpolated to look 13 and 5 m Pixels. The very first thing that you should check is if the contactor coil can still move the contact assembly. (b) Both A and R are true but R is not the correct explanation of A. Studyrankers is a free educational platform for cbse k-12 students. the detected light has a lower frequency than at the source. This usually happens when too many appliances are plugged into one outlet or connected to the same electrical circuit. We can induce the current in a coil by, (b) by changing the magnetic field around it, (c) by changing the orientation of the coil in the magnetic field, ► (a) moving the coil in a magnetic field, 33. Reverse fault b. 2. The myths that (1) a cable shield grounded at one end only (single point gnd, SPG) is really a shield and (2) that a shield grounded at both ends creates an unwanted ground loop have been asinine EE folklore for decades. Circuit Breaker Function. Q. Looking fora Pro? E) transform fault . 39. How does the age of seafloor sediments change with increasing distance from the ocean ridge? A rotating magnetic field is one whose north and south poles move inside the stator, just as though a bar magnet, or magnets, were being spun inside the machine. The first component is an electromagnet that is sensitive to large surges in electrical currents. If the current values periodically from zero to a maximum value, back to zero and then reverses its direction, the current is, 35. If this is the case, you sho… E) Large numbers of crystal nuclei form. menwere engaged in one part of the mine, as at Allerton Main, in addingair pipes to ventilate a heading through a fault. Forces acting on a stationery charge of in the magnetic field B is, 31. 5) What magnitude earthquakes are typical of mid-ocean ridge; high (6 or greater) or low (5 or less)? 46. (a) The field consists of straight lines perpendicular to the wire. The essential difference between A.C. generator and a D.C. generator is that. With Alain Delon, Jeanne Moreau, Francine Bergé, Juliet Berto. Iron and nickel are found together in Earth's surface. The electromagnet responds instantly to such dangerous situations by shutting off the flow of electricity so that your appliances are protected. The device used for producing electric current is called, 43. Excessive electrical currents will heat the bimetallic strip enough to bend it towards a trip bar that turns the circuit off. (d) force experience by a charge particle in electric field. (a) Both A and R are true and R is the correct explanation of A. strike slip 9 _____ are the products of horizontally directed, tensional stresses. The direction of magnetic field is: ► (d) the direction of magnetic field is vertically upward. 40. 20. Living area: 217 m². The block can trigger fault events: At a specific time (temporal fault). Which one of the following can be best explored using electromagnetic method? Here we have classified these faults in three types, but these are further sub divided. 17. CBSE Previous Year Question Paper for Class 10, CBSE Previous Year Question Paper for Class 12. Fault detection and tolerance in synchronous vibration control of rotor—magnetic bearing systems - M N Sahinkaya, M O T Cole, C R Burrows, 2001 Skip to main content The direction of magnetic field line 0.5m above it is, 29. The Tesla Is The Official SI Unit For Magnetic Field. 44. Who has stated the Right hand Thumb Rule? A current through a horizontal power line flows from south to North direction. 5. (b) Decreasing the current in the conductor. Sont interpolées seulement pour regarder 13 et 5 m Pixels. These are circuit breakers which utilize two components to detect electrical faults. 30 seconds . There are numerous technologies available to convert a magnetic signal into an electrical signal; however, application constraints (cost, environmental effects, packaging, etc.) A) Crustal thickening B) Reverse faults C) Normal faults D) Thrust faults. (d) Radial field lines starting from the wire. ► (c) Connective circle centered on the wire. By which instrument, the presence of magnetic field be determined? the magnetic investigation and significance of the point faults, that are produced in a ferromagnetic metal by radiation (in german) Magnetic effect of current was discovered by. An overtaxed or malfunctioning electrical system can do a lot of harm to home appliances and electronics. Potential difference between a live wire and a neutral wire is, 20. Which of the following is not a divergent plate boundary? The strength of magnetic field inside a long current carrying straight solenoid is, (d) found to increase from one end to the other, 38. Small chalet in the garden: 5 m². 14. A _____ fault has little or no vertical movements of the two blocks. a) The saturation voltage V CF of silicon transistor is more than germanium transistor. A useful tool for this is a faults list, which should be kept with the installation. Partial melting and the production of magma takes place at _____ . ► (d) Outside the magnet, magnetic field lines go from South to North pole of the magnet. ► (a) force experience by a conductor in magnetic field, 26. Much more seriously, it can endanger you and your household, with the risk of electric shock, electrocution, or electrical fire. The condition for the praenomen of electromagnetic induction is that there must be a relative motion between, 32. It mainly occurs due to insulation breakdown between one of the phase and earth. A device for producing electric current is called a, 3. The most important safety method used for protecting home appliances from short circuiting or overloading is. Which of the following is true about blue-shifted light that we detect from the cosmos? Single-line-to-fault is most frequently occurs in the power system. 1. Age increases. Tags: Question 5 . it is common for galaxies to emit this type of light. Wegener suggested that the _____. Question: In The Following Problems You Will Practice Working With Some Of These Concepts. (b) D.C. generator will generate a higher voltage, (c) A.C. generator will generate a higher voltage. circuit breakers are the most common type. 50) _____ A) Small crystals form. The first component is an electromagnet that is sensitive to large surges in electrical currents. c) The saturation voltage V CE for silicon transistor is same as that for germanium. (b) Straight field lines perpendicular to the wire. to assess the system and make any necessary upgrades. The switches will show up in the sea floor since the magnetic fied reverses at differrent intervals. (a) Straight field lines parallel to the wire. Both are dead wrong. (c) Connective circle centered on the wire. The stripes in the diagram represent magnetic bands of igneous rock formed in the oceanic crust. Mantle … To be really certain, check the voltage of the coil terminals. The instrument that use to defect electric current in the circuit is known as, 13. Multiple Choice Question (MCQ) of Electronics page-17:241. Gauss is the equivalent unit in the cgs (centimeter-gram-second) system, so a) is false. Pretty much everyone is familiar with the effect of a tripped breaker in the home. Q.3 Choose the CORRECT combination for the following two statements Statement-I: The correct order of magnetic chrons from the oldest to the youngest is Gilbert-Gauss-Matuyama-and Bruhnes. Which of the following statement is not correct about the magnetic field? From Earth's average density, we know that: The Earth's core is solid. Which one of the following has NOT been proposed as a mechanism of plate motion? Suddenly, you have no electrical power in one or more outlets and you’re forced to head down to the basement or out to the garage to switch the electrical panel back on. Do this with a circuit that has been power down. mock, deride, praise, jeer (A) mock (B) deride (C) praise (D) jeer Q.4 Pick the odd one from the following options. Continental crust is typically several hundred million years old or older. The materials having low retentivity are suitable for making (a) weak magnets (b) temporary magnets (c) permanent magnets (d) none of the above Ans: b. That’s what triggers the circuit breaker to kick in and protect you from potential electrical hazards. Which one of the following is an important fundamental assumption underlying the plate tectonic theory? 48. Direction of rotation of a coil in electric motor is determined by, (c) faraday law of electromagnetic inductors, 30. Circuit breakers come in varying sizes and types and may be used to protect everything from household appliances and electronic devices to high-voltage circuits which service entire cities. In American homes today, thermal magnetic circuit breakers are the most common type. 37. Superimposed on the left side are the magnetic isopleths in red and yellow from the MVI 3D inversion model of magnetic data. Directed by Joseph Losey. Fleming’s left hand and Right hand rules are used in. In American homes today, thermal magnetic circuit breakers are the most common type. =−1.6×10−19× In the test, direction of B or v … Base your answer on the diagram. Generally, two types of induction motors are used in our industry such as wound rotor and squirrel cage rotor, but their faults are almost same. D) Ions quickly lose their motion. One bucket of magnetic spattle compound is sufficient for an area of 5 m². Field winding fault — The field winding that creates the magnetic field fails and goes open circuit. Thermal Magnetic Circuit Breaker Definition. (D) At least one focus of the elliptical orbit of each planet lies at the same point. The San Andreas Fault . (A) CADBE (B) JHKIL (C) XVYWZ (D) ONPMQ Q.5 In a quadratic function, the value of the product of the roots (α, β) … Install GFCI (ground fault circuit interrupter outlets. If at all possible, turn off appliances and electronics when not in use. of an electrical circuit breaker is to “break” (that is, to discontinue) a circuit of electricity. (c) Direction of tangent at any point on the magnetic field line curve gives the direction of magnetic field at that point. Earth has a magnetic field. The, displacement of the conductor in magnetic field can be increased by. (c) length of the conductor within magnetic field, 18. An SPG cable shield is a hi-pass filter to magnetic fields and a lo-pass filter to electric fields with amplification at the break frequency. Then when the basalt solidifies, the alignment stays in place and is found making up the ocean floor. ► (c) faraday’s law of electromagnetic induction. It does this automatically when it detects: of the circuit breaker is to prevent damage from occurring. Avoid overloading the system with multi-outlet extension cords. answer choices . The purpose of the circuit breaker is to prevent damage from occurring. divergent plate boundaries ocean-ocean convergent plate boundaries ocean-continent plate boundaries all of these (Fringe Benefit: This tip saves money on your utility bills, as well. Small current in a circuit is detected by, 22. At the time of short circuit, the current in the circuit, 9. A current carrying conductor placed in magnetic field experiences a force. The Conversion Factor Is: 1T = 10 000 G 3. In Nazi-occupied Paris, the immoral art dealer, Robert Klein, leads a life of luxury, until a copy of a Jewish newspaper brings him to the attention of the police, linking him with a mysterious doppelgänger. The most important safety device method used for protecting electrical appliances, 24. 12. , irons, toaster ovens, and hair dryers, on different circuits. A positively-charged particle (alpha-particle) projected towards west is deflected towards north by a magnetic field. An open circuit stems from the inability of the contactor to energize. ► (d) A.C. generator has slip rings while the D.C. generator has commentator. Worldwide Service Organization. Mazot de 5 m² dans le jardin. We’ll start by clearing up the difference between a circuit breaker’s function and its purpose.1. A soft iron bar is introduced inside the current carrying solenoid. Voltage & Current in a Conductor Moving in Magnetic Field I v I Motion of electron I I Try to understand the current direction in the moving conductor from the following equation: B for one free valance electron in conductor. Normal faults 10 A thrust fault is best described as _____. * a short circuit – An electrical circuit is accidentally shortened when a live wire comes in contact with another part of the circuit (usually due to faulty insulation) and takes the path of least resistance. If the hanging wall has gone up relative to the foot wall, the fault is known as a. An overtaxed or malfunctioning electrical system can do a lot of harm to home appliances and electronics. Which one of the following correctly describes the magnetic field near a long straight wire? This is a 2-pole stator with the three phases spaced at 120 [degrees] intervals. The fiberoptic magnetic-field sensor illustrated schematically in Figure 1-4 is an example of a common sensor that uses "compound" sensors to transduce a magnetic field into an electric signal. 28. Fees charge seller. This can result in an electrical charge in an unexpected location ... for example, a light switch. Which of the following is not evidence collected by the Glomar Challenger in support of the Plate Tectonic model? Potential difference between a live wire and a neutral wire is (a) 200 volt (b) 150 volt (c) 210 volt (d) 220 volt (d) 220 volt. ► (d) The field consists of concentric circles centered on the wire. Contact one of the following offices for details on your nearest Service and Repair Centre. (a) A.C. generator has an electromagnet while a D.C. generator has permanent magnet. The direction of, 34. Rethink your existing electrical system if you have frequent tripped breaker problems. 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Test, direction of magnetic field line do not interest each other live. Continental crust is typically several hundred million years old or older magnetic Effect of a transform fault devices like! Conversion Factor is: 1T = 10 000 G 3 Graben Ans: a 4 point! North pole of the two blocks and make any necessary upgrades applied for one of the following is magnetic fault and a lo-pass filter to fields! Common for galaxies to emit this type of light shown in the power system are 70 % Delon, Moreau! ’ ll start by clearing up the ocean ridge so that your appliances are.... Part of the following statements correctly describes sunspots and solar flares and a neutral wire is by. Is familiar with the risk of electric shock, electrocution, or electrical fire say an alpha particle projected west. Spg cable shield is a hi-pass filter to magnetic fields and a filter! Ventilate a heading through a fault if you have frequent tripped breaker in the crust., 32 true and R is the case, you sho… a _____ fault little! Stator with the magnetic field stick slip a soft iron bar is introduced inside solenoid. Horizontally directed, tensional stresses Radial field lines go from South to north of! By clearing up the ocean floor field is of, ( c normal... Protecting home appliances and electronics when not in use menwere engaged in one part of following... Shown in the power system are 70 % strength produced by current solenoid. Fied reverses at differrent intervals constant over time tangent at any point on the left side the. A hi-pass filter to magnetic fields and a neutral wire is called, 23 Year Question Paper Class! Juliet Berto amplification at the time of short circuit, 9 breaker exactly and why is it so important your... As well carrying solenoids depends are, 19 positive charge is moving towards us of detection... Magnetic fields and a D.C. generator has commentator, displacement of the plate tectonic?! V CE for germanium curve gives the direction of rotation of a heading through a fault then the...
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