Question # 1

Lorentz force means the force acting on a particle, which is

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Magnetic force only

Electric force only

Sum of electric and magnetic force

None of these

___ is correct relation.

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IT = 10^-4G

IT = 10⁴ G

IT = 10² G

IT = 10^-2 G

In current carrying long solenoid the magnetic field produced does not depend upon.

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The radius of solenoid

Number of turns per unit length

Current flowing through solenoid

All of the above

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

The sensitivity of galvanometer directly depends upon

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Magnetic field

Area of coil

Both a and b

None of a, b, c

The magnetic field inside solenoid is given:

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μ_∘nI²

μ_∘nI

μ_∘n/1²

μ_∘I/n

Current passing through the coil of galvanometer

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CO/BAN

CoN /BA

NAB/CO

AN/BCO

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

The SI unit of magnetic permeability is.

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WbA-1m-1

Wbm-2

WbmA-1

WbAm-1

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

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Volt meter

Ammeter

Ohmmeter

Digital Multimeter

Which one of the following resistance is used to convert a Galvanometer into an ammeter.

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High resistance

Low resistance in series with galvanometer

Shunt

High resistance in series with galvanometer

A Current flowing towards the reader is denoted by.

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Cross

a bracket

A dot

Positive sign

In CRO, the output waveform of time base generator is

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Circular

Square

Sinusoidal

Saw-toothed

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

A positive charge is moving towards an observer, The direction of magnetic induction will be.

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Toward right

Anti clockwise

Clockwise

Toward left

Shunt resistance is

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Low resistance

Zero resistance

High resistance

Impedance

The Weber is unit of measure of:

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Conductance

Electric current

Magnitic flux

Electric flux

Brightness of screen of CRO controlled by

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Grid

Filament

Anode

Cathode

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