Question # 1

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 most suitable material for permanent magnet is

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cobalt

iron

steel

alaminium

The unit of magnetic flux is

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Weber-m²

Weber-m³

Henry

Weber

The magnetic field outside the solenoid due to current is

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strong

zero

weak

uniform

Avo-meter is used of measure the

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current, voltage

voltage, resistance

resistance, current

current, voltage and resistance

The straight current carrying conductor experiences maximum force in a uniform magnetic field when it is placed

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parallel to the field

Perpendicular to the field

At an angle of 45 to the field

None of the above

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)

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

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weak

strong and uniform

none-uniform

zero

The SI unit of flux density is

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Newton/Amp-meter

Newton-m/Ampere

Newton-m/Amp²

Newton-Amp/meter

F = I(L x B) is a

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vector

scalar

unit vector

none of these

When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be

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changed

zero

unchanged

none of these

The total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called

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magnetic flux

magnetic flux density

magnetic induction

magnetic field intensity

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

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)

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)

A shunt resistance parallel to the galvanometer is used to convert it into

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avometer

millimeter

voltmeter

none of these

If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made

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Sensitive

Accurate

Stable

None of these

The SI unit of magnetic permeability is

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WB A^-1m^-1

WB mA^-1

WB Am^-1

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

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

Resistance is measured in

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volts

ampere

ohm

watt

How many number of anodes used in electron gun

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one

two

three

six

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 pointer of a magnetic compass:

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Is affected only by permanent magnets

Align itself parallel to the applied magnetic field

Vibrates in the magnetic field of the current

Aligns itself perpendicular to the magnetic field

Both (C) and (D)

The force experienced by charged particle is maximum, if it moves

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parallel to magnetic field

perpendicular to magnetic field

opposite to the magnetic field

none of these

A relationship between Gauses of magnetic induction and Tesla(T) is given by

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G 10^-3T

G = 10^-2T

G = 10^-4T

G = 10^-1T

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