Question # 1

The sensitivity of Galvanometer can be increased by:

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Increasing C/BAN factor

Decreasing C/BAN factor

Increasing angle θ

All of above

When a charge is projected perpendicular to a uniform magnetic field, tis path is

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Spiral

Helix

Ellipse

Circular

Shunt resistance is

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Low resistance

Zero resistance

High resistance

Impedance

Useful device to measure resistance, current and voltage is an electronic instrument called.

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Volt meter

Ammeter

Ohmmeter

Digital Multimeter

Write the SI unit of magnetic flux.

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Tesla

Weber

Weber m-2

Tesla m2

The magnetic force is simply a

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Reflecting force

Deflecting force

Restoring force

Gravitational force

If the length and number of turns of a solenoid are doubled strength of magnetic field with.

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Be doubled

Become half

Not change

Be four time

The SI unit of flux density is.

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NA-1 m2

NA-1 m-1

NAm-1

NA-1 m

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

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Large

Small

Constant

Zero

Magnetic lines of force are.

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Imaginary

Real

Perpendicular

In phase with electric lines of force

A battery is used in

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ohmmeter

Ammeter

Galvanometer

Voltemeter

The e/m of a neutron is

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Less than electron

The same as electron

Zero

Greater than election

e/m=

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v/Br

Br/V

VB/r

Vr/B

The force on a charge particle moving parallel to magnetic field is:

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Maximum

Minimum

Zero

None of these

The magnetic field is uniform and stronger

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Outside the solenoid

Inside the solenoid

At the central part of the solenoid

None of these

A charged particle enters in a strong magnetic field its K.E.

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Remain constant

Increases

Decreases

Increases then decreases

The function of three anodes a C.R.O is

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To accelerate electrons only

To focus the electrons only

To control the brightness of spot on screen

To accelerate and focus the electrons

The field is strong and uniform.

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Inside the solenoid

Surrounding of solenoid externally

Perpendicular to solenoid

All of above

The torque in the coil can be increased by increasing:

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No. of turns

Current and magnetic field

Area of coil

All of the above

The effective way to increase the sensitivity of moving coil galvanometer is.

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Increase the area of coil

Increase the number of turn

Increase the magnetic field

Increase the value of constant C

The dimensions of magnetic flux are

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M¹L^-2T¹A¹

MLT^-2A^-1

ML²T²A^-1

ML²T^-2A^-1

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