Question # 1

The field around a moving charge is called

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magnetic field

conservative field

non-conservative field

none of these

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

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

Flurescent screen is a screen where visible spot

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vanishes

is made

becomes small and large

none of these

The strength of magnetic field around the current conductor is

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Smaller near the conductor

Greater near the conductor

Greater at the large distance from the conductor

Constant near and away from the conductor

The magnetic force exerted on an electron moving with velocity 'v' at right angle to the magnetic field is given by

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F=eVB

F=e²V/B

F=e/VB

F=B²/ev

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

The SI unit of flux density is.

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Tesla

Weber

Gaun

Weber/meter

Centripetal force for electron is given by

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mv²/ r

mv / r²

mv²/ r

mr²/ v

In the expression of force experienced by electron, the direction of both v and B are

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parallel

zero

perpendicular

none of them

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)

The angle of deflection of coil can be measured by the

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one method

three method

two method

none of these

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