Question # 1

Two parallel wires carrying currents in the opposite direction.

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Repel each other

Attract each other

Have no effect upon each other

They cancel out their individual magnetic fields.

When charge particle enter perpendicular to magnetic field, the path followed by it is:

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A helix

A circle

Straight line

Ellipes

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

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

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Spiral

Helix

Ellipse

Circular

A charged particle having charge 'q' is moving at right angle to magnetic field. The quantity which varies is.

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Speed

Kinetic energy

Path of motion

angular velocity

If a low resistance is connected parallel to a galvanometer then galvanometer is converted.

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Ammeter

Voltammeter

Ohmmeter

Multimeter

A voltmeter is always connected in

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Parallel

Series

Perpendicular

Straight line

A soft iron cylinder is placed inside coil galvanometer to:

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Make field circular and strong

Make field radial and weak

Make field radial and strong

All of above

To convert a galvanometer into a volt meter a high resistance is connected.

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In series

In parallel

In perpendicular

Along tangent

In CRO, the output waveform of time base generator is

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Circular

Square

Sinusoidal

Saw-toothed

The SI unit of magnetic induction Tesla is equal to

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N-1 Am

NA m2

NA-1n2

NA-1m-1

The unit of Magnetic flux is called.

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weber

weber/m²

NM^-1A^-1

None of above

If the number of turns become double but length remain same, then magnetic field in the solenoid become.

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Half

Double

Remain same

Zero

If an electron is prijected in a magnetic field with velocity V, it will experience a force

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Cathode ray oscilloscope works by deflecting a beams

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Neutrons

Protons

Electrons

Positron

The acceleration of an electron of mass m and charge e, moving with uniform speed v at right angles to a magnetic field of flux density B, is given by

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Bevm

The sensitivity of galvanometer is given by

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CAN/B

C/BAN

BAN/C

BN/CA

The SI unit of magnetic permeability is.

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WbA-1m-1

Wbm-2

WbmA-1

WbAm-1

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