Question # 1

Amperean path is a:

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Closed path

Rectangular path

Circular path

Any of above

Broken path

In a moving coil galvanometer, the deflecting couple depends upon

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area of the coil

number of turns of coil

value of magnetic field

all of the above

Tesla is the unit of

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Magnetic induction or flux density

Magnetic flux

Self inductance

None of these

Centripetal force for electron is given by

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mv²/ r

mv / r²

mv²/ r

mr²/ v

The CRO is used for displaying the waveform of a given

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current

voltage

both of them

none of them

Ammeter is used to measure

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voltage

resistance

voltage and current

current

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

The direction of lines of force depends upon the direction of

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voltage

current

charges

none of these

(CRO) Cathode ray oscilloscope is a device used for high speed

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velocity

graph plotting

time-velocity

none of these

When some compass needles are placed on a card board along a circle with the center at the wire, they will

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Point the direction of N-S

Set themselves tangential to the circle

Point in the direction of E-W

None of these

Point in direction of S-E

41 The force experience, when proton projected in a magnetic field with velocity 'v' is

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+e(v x B)

-C(V x B)

+e²(v x B)

-e(v²x B)

The unit of flux density is also given by

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Weber/m²or Wb . m^-2

Weber/mor Wb . m

Weber/mor Wb . m^-1

Weber or Wb

The torque per unit twist of coil is called

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proportionality constant

gravitational constant

boltzman constant

coupling constant

CRO deflects the beam of

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proton

a-particle

electron

neutron

The vector representation of force experience give the direction of

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magnetic field

current

length of conductor

force

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

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