Electromagnetic Induction Mcqs
Our collections of Multiple choice questions and answers focuses on study of Electromagnetic Induction in Physics. These questions are chosen from a collection of most authoritative and best reference books on Physics. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, MDCAT, Teaching jobs Tests and Chemical industry job interviews. One should practice our Mcqs to assimilate knowledge on Electromagnetic Induction in Physics comprehensively.
2. A dynamo converts
Mechanical energy into electrical energy
Electrical energy into mechanical energy
Magnetic energy into mechanical energy
Magnetic energy into electrical energy
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3. A metal rod of 25 cm length is moving at a speed of 0.5/sec in direction perpendicular to 0.25T magnetic field. Emf produced in the rod is
0 volt
3.125 volt
31.25 volt
0.03125 volt
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4. A small coil lies inside a large coil. The two coils are horizontal concentric and carry currents in opposite directions. The large coil will experience
A torque about horizontal axis
A torque about vertical axis
An upward force along the axis
No resultant force
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5. A.C and D.C have the same
Effect in charging a capacitor
Effect in charging a battery
Effect while passing through an inductance
Heating effect through a resistance
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6. A.C can not be used for
Producing heat
Producing light
Magnetizing iron
Producing magnetic field
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7. A.C cannot be used for
Producing heat
Producing light
Magnetizing and electroplating
All the above
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8. An aeroplane of wingspan 10m flies from the equator towards the North Pole. The wings are perpendicular to the vertical component of the earths magnetic field (B = 4×10-5T). At maximum speed an emf of 96mV is induced across the wing tips. The maximum speed of the aeroplane is
150msec-1
384msec-1
38.4msec-1
200msec-1
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9. An alternating current or voltage
Fluctuates off and on
Varies in magnitude alone
Changes its direction again and again
Changes its magnitude continuously and reverses its direction of flow after regularly recurring intervals.
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10. An electric current induced within the body of a conductor when that conductor either moves through a non uniform magnetic field or in a region where there is a change in magnetic flux is called
Induced current
Eddy current
Back emf
None of the above
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11. cmf generated by A.C dynamo depends upon
Number of turns in the coil
Magnetic field strength
Frequency of rotation
All of above
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12. Current produced by moving the loop of wire across a magnetic field is called
A.C current
D.C current
Induced current
Mean square current
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13. emf induced in a circuit according to Faradays law depends on the
Maximum magnetic flux
Rate of change of magnetic flux
Change in magnetic flux
Initial magnetic flux
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14. Energy stored in a magnetic field is given by
LI2
L2I/2
LI2/2
IL2
15. For electroplating we use
A D.C source
An A.C source
Any source
All of the above
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