Question # 1

The galvanometer can be made sensitive if the value of the factor C/BAN is

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constant

small

large

none of these

A meter wire carraying a current of 2A is at right angle to the uniform magnetic field of 0.5 Weber/m²The force on the wire is

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5N

4N

1.5N

6N

At a given instant, a photon moves in +x direction in a region where there magnetic field in -z direction. The magnetic force on the proton will be the:

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-y direction

+y direction

+z direction

-z direction

None of these

The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon

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Heating effect of current

Chemical effect of current

Magnetic effect of current

Electromagnetic effect of current

NmA^-1is commonly called:

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Weber

Apmere

Guass

Coulomb

None of these

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)

A current carrying conductor sets up its own:

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Electric field

Nuclear field

Magnetic field

Both (A) and (C)

All of these

Magnetic induction is also called as:

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Ampere’s law

Faraday’s law

Lenz’s law

Newton’s law

Coulomb’s law

Resistance is measured in

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volts

ampere

ohm

watt

Centripetal force for electron is given by

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mv²/ r

mv / r²

mv²/ r

mr²/ v

F = I(L x B) is a

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vector

scalar

unit vector

none of these

if the field is directed along the normal to the area, then flux is:

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Maximum

Equal to zero

Equal to BA

Minimum

Both (A) and (C)

Amperean path is a:

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Closed path

Rectangular path

Circular path

Any of above

Broken path

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

The voltage increases linearly with

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time

velocity

acceleration

torque

The unit of magnetic flux is

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Weber-m²

Weber-m³

Henry

Weber

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