Question # 1

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Lenz's law

Faraday's law

Ampere's law

None of these

For step down transformer

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Ns>Np

Np > Ns

Ns = Np

Ns > > > Np

In case of inductor , energy is stored in the

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Electric field

Magnetic field

Potential field

Gravitational field

DC generator by william Sturgeon in:

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1894

1961

1834

1961

The motional emf developed in a conduction depends upon.

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Length

Orientation

Magnetic field

All of the above

The device in the circuit that consume electrical energy are known as.

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Dissipaters

Generator

Load

Motors

The motional emf is give by

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qvB

IBL

eBL

vBL

Electric current produces magnetic field, was suggested by.

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Faraday

Oersted

Henry

Lenz

One henry is equal to

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1 ohm x 1 sec

1 ohm x 1 hertz

1 ohm x 1 metre

All of above

The Lenz's law is also statement of:

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Law of conservation of mass

Law of conservation of charge

Law of conservation of energy

Law of conservation of momentum

The current induced can be increased by:

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Using a stronger magnetic field

Moving the loop faster

Replacing the loop bay coi of many turns

All of above

Step up transfer has a transformation ratio of 3:2. What is the voltage in secondary , If voltage in primary is 30 V?

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45 V

15 V

90 V

300 V

The Lenz's law fulfils.

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Law of conservation of energy

Law of conservation of charge

Law of conservation of momentum

Kirchhoff's law

The negative sign with induced emf in Faraday's law is in accordance with

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Lenz's law

Amperes law

Boyle's law

Gauss law

Step up transformer is used.

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Step up D.C. voltage

Step up A.C. voltage

Step up both A.C and D.C.

Step up A.C. current

EMF is induced due to change in

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Charge

Current

Magnetic flux

Electric field

A current generator device converts:

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Mechanical energy into chemical energy

Chemical energy into electrical energy

Mechanical energy into electrical energy

Both b and c

Transformer is used to change

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Electric power

Magnetic field

Alternating voltage

Phase of A.C.

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