Question # 1

Tesla is the unit of

Choose an answer

Magnetic induction or flux density

Magnetic flux

Self inductance

None of these

For the conversion of galvanometer into voltmeter, we connect a

Choose an answer

small resistance in series with galvanometer

small resistance in parallel with galvanometer

high resistance in parallel with galvanometer

high resistance series with galvanometer

In order to make a voltmeter, high resistance is connected with galvanometer, in

Choose an answer

perpendicular

may be paralled or pendicular

series

none of these

Strength of magnetic field is measured in SI units, in:

Choose an answer

N

N/Am

Am/N

Nm/A

None of these

The most suitable material for permanent magnet is

Choose an answer

cobalt

iron

steel

alaminium

When some compass needles are placed on a card board along a circle with the center at the wire, they will

Choose an answer

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

Which is modified form of galvanometer

Choose an answer

potentiometer

battery

voltmeter

slide wire bridge

(CRO) Cathode ray oscilloscope is a device used for high speed

Choose an answer

velocity

graph plotting

time-velocity

none of these

CRO deflects the beam of

Choose an answer

proton

a-particle

electron

neutron

The current is measured in

Choose an answer

volts

watt

ampere

ohm

Galvanometer is a device used for the detection of

Choose an answer

voltage

current

temperature

pressure

The SI unit of magnetic permeability is

Choose an answer

WB A^-1m^-1

WB mA^-1

WB Am^-1

None of these

To convert galvanometer into ammeter we connect

Choose an answer

small resistance in parallel with galvanometer

small resistance in series with galvanometer

high resistance in series with galvanometer

high resistance in parallel with galvanometer

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

Choose an answer

parallel

zero

perpendicular

none of them

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

Choose an answer

G 10^-3T

G = 10^-2T

G = 10^-4T

G = 10^-1T

the current is pass through the straight wire. The magnetic field established around it has its lines of force:

Choose an answer

Circular and endless

Oval in shape and endless

Straight

Parabolic

All are true

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

Choose an answer

changed

zero

unchanged

none of these

'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?

Choose an answer

0

1

0.5

-1

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

Choose an answer

F=eVB

F=e²V/B

F=e/VB

F=B²/ev

Charge to mass ratio (e/m) of an electron is given by the relation

Choose an answer

e/m = 2V/Br²

e/m = 2V/B²r

e/m = 2V/B²r²

e/m = V/2B²r²

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

Choose an answer

Thumb

Curled fingers

Middle finger

Arm of right hand

None of these

A resistance used in galvanometer to make it voltmeter is called

Choose an answer

shunt resistance

high resistance

zero resistance

none of these

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

Choose an answer

ammeter

voltmeter

galvanometer

avo-meter

Resistance is measured in

Choose an answer

volts

ampere

ohm

watt

Magnetic lines of force:

Choose an answer

Cannot intersect at all

Intersect at infinity

Intersect within magnet

Intersect at Neutral Point

None of these

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

Choose an answer

modification

voltage

current

resistance

Flurescent screen is a screen where visible spot

Choose an answer

vanishes

is made

becomes small and large

none of these

More Classes

Other Links

ECAT Pre General Science Physics Chapter 14 Electromagnetism Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer