Question # 1

The voltage increases linearly with

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time

velocity

acceleration

torque

The field around a moving charge is called

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magnetic field

conservative field

non-conservative field

none of these

Magnetic flux passing through a element whose vector area makes an angle0º with lines of magnetic force is:

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BACosѲ

Zero

BA

BA sinѲ

None of these

Amperean path is a:

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Closed path

Rectangular path

Circular path

Any of above

Broken path

For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as

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modification

voltage

current

resistance

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 resistance used in galvanometer to make it voltmeter is called

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shunt resistance

high resistance

zero resistance

none of these

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

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

If volume of wire is 'AL' and there are 'n' numbers of charge carriers per unit volume, then the total number of charge carriers are

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n/AL

Al/n

nAL

nA/L

The SI unit of magnetic flux is.

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weber

Nm^-1A^-1

tesla

gauss

The current in microamperes required to produce one millimeter deflection on a scale placed one meter away from the mirror of the galvanometer, defined the sensitivity of

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ammeter

voltmeter

galvanometer

avo-meter

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

It is customary represent a current flowing towards the reader by a symbol

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(x)

(+)

(.)

(-)

(÷)

The torque per unit twist of coil is called

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proportionality constant

gravitational constant

boltzman constant

coupling constant

The CRO is used for displaying the waveform of a given

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current

voltage

both of them

none of them

Which is modified form of galvanometer

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potentiometer

battery

voltmeter

slide wire bridge

When charged particle is projected perpendicular to a uniform magnetic field its trajectory is

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circular

elliptical

cycloid

straight line

Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:

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Thumb

Curled fingers

Middle finger

Arm of right hand

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)

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 unit of magnetic flux is

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Weber-m²

Weber-m³

Henry

Weber

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

Magnetic lines of force:

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Cannot intersect at all

Intersect at infinity

Intersect within magnet

Intersect at Neutral Point

None of these

The magnetic field outside the solenoid due to current is

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strong

zero

weak

uniform

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

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90°

75°

0°

180°

The SI unit of magnetic induction is

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Gauses

Tesla

Weber

Weber²

Ammeter is used to measure

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voltage

resistance

voltage and current

current

If the number of turns of a solenoid (carrying a steady current I) is doubled without changing the length of a solenoid, then magnetic field:

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Becomes Half

Becomes double

Is not affected

Becomes one fourth

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 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

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