Question # 1

In a moving coil galvanometer, the deflecting couple depends upon

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area of the coil

number of turns of coil

value of magnetic field

all of the above

The SI unit of magnetic flux is

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NmA^-2

NmA^-1

NAm^-1

Nm²A^-1

The direction of lines of force depends upon the direction of

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voltage

current

charges

none of these

A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is

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minimum

maximum

zero

none of these

CRO deflects the beam of

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proton

a-particle

electron

neutron

Amperean path is a:

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Closed path

Rectangular path

Circular path

Any of above

Broken path

How many number of anodes used in electron gun

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one

two

three

six

The sources of magnetic field are

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isolated magnetic poles

charges at rest

charges in motion

none of these

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

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

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

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Circular and endless

Oval in shape and endless

Straight

Parabolic

All are true

Which is modified form of galvanometer

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potentiometer

battery

voltmeter

slide wire bridge

NmA^-1is commonly called:

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Weber

Apmere

Guass

Coulomb

None of these

When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into

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Voltmeter

Avometer

Ammeter

None of these

The current sensitivity of the galvanometer is

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C/BAN

BAN/C

CAN/B

CBN/A

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)

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ECAT Physics Chapter 14 Electromagnetism Online Test MCQs With Answers

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