Question # 1

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

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

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

The direction of lines of force depends upon the direction of

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voltage

current

charges

none of these

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

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minimum force

maximum force

zero

moderate force

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

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

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

The gavanometer constant of a moving coil galvanometer is given by

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K=BAN/C

K=BN/CA

K=NAC/B

K=C/BAN

The magnetic field in the middle of a solenoid due to current is

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weak

strong and uniform

none-uniform

zero

Amperean path is a:

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Closed path

Rectangular path

Circular path

Any of above

Broken path

Tesla is the unit of

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Magnetic induction or flux density

Magnetic flux

Self inductance

None of these

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 SI unit of magnetic induction is

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Gauses

Tesla

Weber

Weber²

A resistance used in voltmeter is called

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shunt resistance

high resistance

low resistance

zero resistance

The SI unit of magnetic flux is.

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weber

Nm^-1A^-1

tesla

gauss

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