Question # 1

The galvanometer can be made sensitive by making the factor BAN/C

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Large

Small

Constant

Zero

The value of Wien's constant:

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2.9x10^-3mk

2.19x10^-7mk

3.18 x10⁶ km^-1

6.21 x 10^-9m²wk³

Heat energy is converted into electrical energy.

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Solar cells

thermocouples

Electric generators

None of above

By winding the coil around a less magnetic core, self induction.

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Will increase

Will decrease

Remain same

First increase then decrease

If V_rms be the root mean square value of emf then its peak to peak value is given by

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The internal resistance of a capacitor is called:

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Impedance

Resistance

Reactance

Conductance

A wire stretched to double of its length, its strain is:

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2

1

0

0.5

If the frequency of A.C. supplied is doubled then the capacitive reactance becomes.

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Half

Two

Four times

One fourth

The sum of positive and negative peak value called.

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R.M.S. value

P-P value

Peak value

Average value

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, Then

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The charge in the plates reduces and potencial difference increase

Potencial difference between the plates increase, stored energy decreases and charge remains the same

Potencial difference between the plates decreases, stored energy decreases and charge remains unchanged

None of them

A battery move a charge of 40 C around a circuit at constant rate in 20 Sec. The current will be.

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2 A

0.5 A

80 A

800 A

In the capacitive circuit of A.C. quantity when q= 0 the slope of q-t curve is.

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Maximum

Minimum

Zero

Negative

If D.C. input for step up transformer, the output is

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Zero

High

Low

May be high or low

The process by which lesser beam can be used to generate 3-dimensional images of objects is called

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Holography

Geo graphy

Tomography

Radio graphy

The device which allows only the flow of D.C. is.

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Capacitors

transformer

Inductor

Generator

The field is strong and uniform.

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Inside the solenoid

Surrounding of solenoid externally

Perpendicular to solenoid

All of above

The electric intensity due to two oppositely charged plates is

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None of these

If both the magnitude of charges and distance between them is doubled, then coulomb's force will be.

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Doubled

Hlaf

Remain same

One fourth

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