Question # 1

The strength of magnetic field at certain points around a wire depends upon:

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Value of current passing

Distance from the current element

Color of the material

Both (A) and (B)

Both (B) and (C)

The third band of the colour code:

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Gives the number of zeroes

Is decimal multiplier

Gives the resistance tolerance

Gives the third digit

Both (A) and (B)

Electric field lines emerge from the charge in:

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One dimension

Two dimensions

Three dimensions

Four dimensions

None of them

The quantity having the same unit as that of emf is:

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Force

Energy

Potential

Current

Charge

An example of photoconductor is:

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Boron

Carbon

Iron

Aluminum

Selenium

The best conductor is:

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Silver

Copper

Aluminimum

Both B and C

None of them

The flux through a closed surface depends upon:

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Shape of geometry of the closed surface

Charge enclosed

Nature of the medium

Both (A) and (B)

Both (B) and (C)

The passage of current is accompanied by a magnetic field in the surrounding space:

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Always accompanied

Sometimes accompanied

Never accompanied

Any of above

None of these

The charge carries in the electrolyte are:

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Positive ions

Negative ions

Either (A) or (B)

Both (A) and (B)

Neither (A) nor (B)

SI unit of current describes the flow of charge at the rate of

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One ampere per second

One coulomb per second

One electron per second

6.25 x 10¹⁸electrons per second

Both B and D

When two spherical conducting balls at different potentials are joined by a metallic wire, after some time:

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Both the conductors are at the same potential

Potential difference across the conductors remain constant

Potential difference across the conductors becomes zero

Both (A) and (B)

Both (A) and (C)

When two spherical conducting balls at different potentials are joined by a metallic wire, after some time:

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Both the conductors are at the same potential

Potential difference across the conductors remain constant

Potential difference across the conductors becomes zero

Both (A) and (B)

Both (A) and (C)

An eV is unit of:

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Potential

Energy

Work

Power

Both (B) and(C)

In case of metallic conductors, the change carries are:

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Protons

Electrons

Antiprotons

Positrons

Both (A) and (B)

Which instrument is expensive and difficult to use?

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Voltmeter

Potentiometer

CRO

Both A and C

Both A and B

A current of 1 ampere is passing through a conductor. The charge passing through it in half a minute s

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One coulomb

0.5 coulomb

30 coulombs

2 coulombs

None of these

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