Question # 1

Ammeter is used to measure

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voltage

resistance

voltage and current

current

The magnetic field inside a solenoid can be increased by:

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Increasing n

Decreasing I

Increasing I

By using iron core within solenoid

All correct except (B)

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

Resistance is measured in

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volts

ampere

ohm

watt

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

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

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

The torque per unit twist of coil is called

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proportionality constant

gravitational constant

boltzman constant

coupling constant

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 CRO deflects the beam of electrons, when they passes through uniform

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electric field

gravitational field

magnetic flax

magnetic field

If volume of wire is 'AL' and there are 'n' numbers of charge carriers per unit volume, then the total number of charge carriers are

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n/AL

Al/n

nAL

nA/L

If current through conductor is 1 A and length of conductor is 1m placed at right angle to the magnetic field, then the strength of magnetic field is

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F = B²

F = 0

F = B

F = B/2

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

The SI unit of magnetic permeability is

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WB A^-1m^-1

WB mA^-1

WB Am^-1

None of these

The SI unit of flux density is.

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Tesla

Weber

Gaun

Weber/meter

Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:

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Maximum

Minimum

Zero

Very small

None of these

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