Question # 1

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

A magnetic force on an electron travelling with 10⁸ms^-1parallel to a field of strength 1 Wb m^-2is

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Zero

10⁵m

10^-10N

10⁸N

Galvanometer is a device used for the detection of

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voltage

current

temperature

pressure

The force experienced by a single charge carrier moving with velocity 'v' i magnetic field of strength 'B' is given by

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F =q(v/B)

F=q²(v x B)

F=q(v x B)

F= vx B

A relationship between Gauses of magnetic induction and Tesla(T) is given by

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G 10^-3T

G = 10^-2T

G = 10^-4T

G = 10^-1T

In order to make a voltmeter, high resistance is connected with galvanometer, in

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perpendicular

may be paralled or pendicular

series

none of these

NmA^-1is commonly called:

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Weber

Apmere

Guass

Coulomb

None of these

If the number of turns of a solenoid (carrying a steady current I) is doubled without changing the length of a solenoid, then magnetic field:

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Becomes Half

Becomes double

Is not affected

Becomes one fourth

None of these

For the conversion of galvanometer into voltmeter, we connect a

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small resistance in series with galvanometer

small resistance in parallel with galvanometer

high resistance in parallel with galvanometer

high resistance series with galvanometer

A charged particle moving at right angle to the magnetic field will experience

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minimum force

maximum force

zero

moderate force

Resistance is measured in

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volts

ampere

ohm

watt

magnetic field is a:

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Vector quantity

Scalar quantity

Scalar as well as scalar quantity

Any of (A) or (B)

Neither (A) nor (B)

The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by

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F=IB/L

F= L x B/I

F = IL x B

F = IL . B

A galvanometer is an instrument used to

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measure voltage across a circuit

detect current in a circuit

measure current flowing through a circuit

none of these

The field around a moving charge is called

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magnetic field

conservative field

non-conservative field

none of these

Magnetic flux and flux density are related by

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Flux density = flux x area

Flux density = flux / area

Flux density = flux - area

None of these

If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made

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Sensitive

Accurate

Stable

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)

A beam of electrons is provided by an

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electron gun

Suppray

Injection

None of these

Ammeter is used to measure

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voltage

resistance

voltage and current

current

Magnetic lines of force:

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Cannot intersect at all

Intersect at infinity

Intersect within magnet

Intersect at Neutral Point

None of these

A voltmeter is used to measure the

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potential difference

current

temperature

resistance

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

The permeability of free space is measured in:

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Wb/Am

Wb A/m

Am/Wb

m/Web A

None of these

the current is pass through the straight wire. The magnetic field established around it has its lines of force:

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Circular and endless

Oval in shape and endless

Straight

Parabolic

All are true

Flurescent screen is a screen where visible spot

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vanishes

is made

becomes small and large

none of these

The SI unit of magnetic induction is tesla which is equal to

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Newton/ampere-meter or N/A-m

Newton/ampere²-meter or N/A²-m

Newton/ampere²-meter² or N/A²-m²

Newton/ampere²-meter²or N/A²-m²

Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as

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IT = 10^-4G

IT = 10⁵G

IT = 10³G

IT = 10⁴G

Total number of turns on 0.15 m length solenoid is 300. the value of n is:

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Greater than 300

Smaller than 300

Equal to 300

Any of (A) or (B)

Any of (A) or(C)

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

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circular

elliptical

cycloid

straight line

When current passes through a solenoid coil, it behaves like a

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loop

circle

bar magnet

none of these

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