# MCAT/MCAT Physics Mcq Questions Electromagnetic Induction Sample Test,Sample questions

1.2 x 106m/sec

2.3 x 106m/sec

3.5 x 106m/sec

4.4 x 106m/sec

1.2.5 x 10-8 C

2.10-5 C

3.103 C

4.4 x 103 C

## Question: `A capacitor is a perfect insulator for`

1.direct current

2.alternating current

3.both for the direct and alternating current

4.none of above

1.200J

2.100J

3.1000J

4.100 eV

## Question: `A dynamo converts`

1.mechanical energy into electrical energy

2.electrical energy into mechanical energy

3.magnetic energy into mechanical energy

4.magnetic energy into electrical energy

## Question: `A.C and D.C have the same`

1.effect in charging a capacitor

2.effect in charging a battery

3.effect while passing through an inductance

4.heating effect through a resistance

## Question: `A.C cannot be used for`

1.producing heat

2.producing light

3.magnetizing and electroplating

4.all the above

## Question: `An alternating current or voltage`

1.fluctuates off and on

2.varies in magnitude alone

3.changes its direction again and again

4.changes its magnitude continuously and reverses its direction of flow after regularly recurring intervals.

1.4 volts

2.9 volts

3.2 volts

4.1 vol

## Question: `cmf generated by A.C dynamo depends upon`

1.number of turns in the coil

2.magnetic field strength

3.frequency of rotation

4.all of above

## Question: `Current produced by moving the loop of wire across a magnetic field is called`

1.A.C current

2.D.C current

3.induced current

4.mean square current

1.Q/?oA

2.Q/e

3.QV2

4.Q2/C

1.1/4II?? . q/r

2.q/??

3.1/4II?? . q/r2

4.4II??

1.zero

2.infinite

3.positive

4.negative

## Question: `emf induced in a circuit according to Faradays law depends on the`

1.maximum magnetic flux

2.rate of change of magnetic flux

3.change in magnetic flux

4.initial magnetic flux

1.LI2

2.L2I/2

3.LI2/2

4.IL2

## Question: `Equipotential planes are`

1.parallel to one another

2.non parallel to one another

3.intersecting

4.circular

## Question: `Equivalent capacitance is greater than individual capacitances in`

1.series combination

2.parallel combination

3.both series and parallel combinations

4.none of above

## Question: `For electroplating we use`

1.A D.C source

2.an A.C source

3.any source

4.all of the above

1.60?

2.45?

3.90?

4.0?

## Question: `If a charged rod is brought closer to a gas filled balloon then`

2.Balloon bursts

4.Balloon squeezes

1.Spiral path

2.Straight line

3.Curved path

4.Circular path

## Question: `If metallic conductor is charged negatively then its weight`

1.Remains same

2.First increases then decreases

3.Decreases then increases

4.Increases for a while

## Question: `If mica sheet is placed between the plates of a capacitor the capacity`

1.increases

2.decreases

3.increases then decreases

4.decreases then increases

## Question: `If the coil is wound on an iron core the flux through it will`

1.decrease

2.become zero

3.remain the same

4.increase

1.Vs/Vp = Np/Ns

2.Vs/Vp = Ns/Np

3.Vp/Vs = Ns/Np

4.Vp/Vs = Np/Ns

## Question: `If two charges are increased by two times then force`

1.Decreases 9 times

2.Increases 9 times

3.Increases 4 times

4.Decreases 4 times

## Question: `In a charged capacitor the energy resides in`

1.magnetic hield

2.electric field

3.nuclear field

4.gravitational field

## Question: `In a non-uniform electric field a polar molecule will experience`

1.Net torque

2.Net force

3.both series and parallel combinations

4.zero

## Question: `Inductors acts as a short circuit for`

1.AC

2.DC

3.Both (a) and (b)

4.none of these

1.V/A

2.J/V

3.V/m

4.A/m

## Question: `Photocopier and inject printer are dealt in`

1.Electrostatics

2.Charges in motion

3.Capacitors

4.Electric fields

## Question: `Potential difference is the work done in moving unit positive charge form one point to another`

1.in the direction of electric intensity

2.against electric intensity

3.in any direction

4.in the direction of electric flux

## Question: `Power loss in actual transformer is due to`

1.Small output

2.Eddy currents and magnetic hysterias

3.Soft iron core

4.Back emf

## Question: `Selenium becomes a conductor in light so it behaves like`

1.Semiconductor

2.Photodiode

3.Light emitting diode

4.Capacitor

## Question: `Self inductance of a coil depends upon`

1.current flowing

2.number of turns per unit length

3.voltage produce

4.all

1.Nm2C2

2.N-1mC-2

3.NmC-1

4.N-1m-2C2

1.6.2 x 1018

2.1.6 x 1019

3.6.2 x 1021

4.1.6 x 10-27

1.carbon brushes

2.coil

3.commutator

4.magnetic field

1.A.C generator

2.D.C dynamo

3.induction coil

4.transformer

## Question: `The value of the capacitance depends upon the`

1.voltage applied

2.thickness of the capacitor plates

3.geometry of the capacitor

4.dinsity of the capacitor plates

1.8?F

2.0.8?F

3.1?F

4.16?F

## Question: `Two oppositely charged balls A and B attract third conducting ball C when placed near them turn by turn. Then ball C must be`

1.positively charged

2.electrically neutral

3.negatively charged

4.positively and negatively charged

## Question: `Value of ?r for various dielectrics is always`

1.less than unity

2.equal to unit

3.larger than unit

4.no hard and fast rule

## Question: `Weber is the unit of`

1.Magnetic field intensity

2.magnetic induction

3.magnetic flux

4.self-inductance

1.transformer

2.motor

3.D.C generator

4.A.C generator

## Question: `Which of the following works on torque on the current carrying conductor placed in magnetic field.`

1.galvanometer

2.ammeter

3.voltmeter

4.all of the above

1.F/A

2.?/A

3.???/A

4.q/??A

1.galvanometer

2.ammeter

3.voltmeter

4.all of above

1.?W = 1?V

2.?W = F?r

3.zero

4.W = 1/4????V

## More MCQS

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