Question # 1

A resistance used in galvanometer to make it voltmeter is called

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shunt resistance

high resistance

zero resistance

none of these

The vector representation of force experience give the direction of

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magnetic field

current

length of conductor

force

A solenoid is a coil of wire which is:

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Short, loosely wound, cylindrical

Long, tightly wound, spherical

Long, loosely wound, cylindrical

Long, tightly wound, cylindrical

None of these

When charged particle is projected perpendicular to a uniform magnetic field its trajectory is

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circular

elliptical

cycloid

straight line

The gavanometer constant of a moving coil galvanometer is given by

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K=BAN/C

K=BN/CA

K=NAC/B

K=C/BAN

When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into

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Voltmeter

Avometer

Ammeter

None of these

CRO deflects the beam of

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proton

a-particle

electron

neutron

The SI unit of magnetic induction is

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Gauses

Tesla

Weber

Weber²

The most suitable material for permanent magnet is

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cobalt

iron

steel

alaminium

To convert galvanometer into ammeter we connect

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small resistance in parallel with galvanometer

small resistance in series with galvanometer

high resistance in series with galvanometer

high resistance in parallel with galvanometer

The current is measured in

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volts

watt

ampere

ohm

F = I(L x B) is a

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vector

scalar

unit vector

none of these

Which is modified form of galvanometer

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potentiometer

battery

voltmeter

slide wire bridge

The current sensitivity of the galvanometer is

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C/BAN

BAN/C

CAN/B

CBN/A

The working of galvanometer depends upon torque exerted on a current carrying coil in

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magnetic field

electric field

gravitational field

nuclear field

The SI unit of magnetic permeability is

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WB A^-1m^-1

WB mA^-1

WB Am^-1

None of these

When the charged particle is projected at right angles to the field, then experienced by it will be:

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Maximum

Zero

qvB

Both (A) and (B)

Both (A) and (C)

The force acting as one meter length of the conductor placed at right angle to the magnetic field, when one A current is passing through it, defines the

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magnetic flux

magnetic induction

magnetic field

self inductance

The e/m of an electron moving in a circular path in a magnetic field is equal to

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V/Br

V/B²r²

V²/Br²

V²/Br

Ammeter is used to measure

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voltage

resistance

voltage and current

current

The CRO is used for displaying the waveform of a given

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current

voltage

both of them

none of them

Electron gun consist of

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three anodes

heating cathode

three anodes

three anodes , heating cathode, grid

Resistance is measured in

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volts

ampere

ohm

watt

The field around a moving charge is called

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magnetic field

conservative field

non-conservative field

none of these

Which one of the following relations is correct?

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1 Wb-m²= Nm^-1A^-1

1 tesla = 104 gausses

1 Wb-m²= 1 tesla

All of the above

A beam of electrons is provided by an

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electron gun

Suppray

Injection

None of these

A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is

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minimum

maximum

zero

none of these

Current is measured in

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volts

watt

ohm

ampere

When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be

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changed

zero

unchanged

none of these

Lorentz force is defined as

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q(E + V x B)

q(E x B + V)

q(E x V + B)

q(E x B)

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