Question # 1

Current is measured in

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volts

watt

ohm

ampere

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

Galvanometer is a device used for the detection of

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voltage

current

temperature

pressure

The torque per unit twist of coil is called

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proportionality constant

gravitational constant

boltzman constant

coupling constant

F = I(L x B) is a

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vector

scalar

unit vector

none of these

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 magnetic field outside the solenoid due to current is

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strong

zero

weak

uniform

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

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velocity

graph plotting

time-velocity

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)

Tesla is the unit of

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Magnetic induction or flux density

Magnetic flux

Self inductance

None of these

The working of galvanometer depends upon torque exerted on a current carrying coil in

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magnetic field

electric field

gravitational field

nuclear field

NmA^-1is commonly called:

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Weber

Apmere

Guass

Coulomb

None of these

The SI unit of magnetic induction is tesla which is equal to

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Newton/ampere-meter or N/A-m

Newton/ampere²-meter or N/A²-m

Newton/ampere²-meter² or N/A²-m²

Newton/ampere²-meter²or N/A²-m²

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)

Which is modified form of galvanometer

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potentiometer

battery

voltmeter

slide wire bridge

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

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Physics ECAT Pre Engineering Chapter 14 Electromagnetism Online Test MCQs With Answers

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