Question # 1

Tesla is the unit of

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Magnetic induction or flux density

Magnetic flux

Self inductance

None of these

A long wire wound tightly on a cylindrical core is called:

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Potentiometer

Solenoid

Toroid

Wheat and stone bridge

None of these

If current through conductor is 1 A and length of conductor is 1m placed at right angle to the magnetic field, then the strength of magnetic field is

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F = B²

F = 0

F = B

F = B/2

NmA^-1is commonly called:

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Weber

Apmere

Guass

Coulomb

None of these

When current passes through a solenoid coil, it behaves like a

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loop

circle

bar magnet

none of these

Ammeter is used to measure

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voltage

resistance

voltage and current

current

The force acting as one meter length of the conductor placed at right angle to the magnetic field, when one A current is passing through it, defines the

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magnetic flux

magnetic induction

magnetic field

self inductance

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)

Electron gun consist of

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three anodes

heating cathode

three anodes

three anodes , heating cathode, grid

A beam of electrons is provided by an

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electron gun

Suppray

Injection

None of these

The sources of magnetic field are

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isolated magnetic poles

charges at rest

charges in motion

none of these

Current is measured in

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volts

watt

ohm

ampere

The permeability of free space is measured in:

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Wb/Am

Wb A/m

Am/Wb

m/Web A

None of these

The SI unit of flux density is

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Newton/Amp-meter

Newton-m/Ampere

Newton-m/Amp²

Newton-Amp/meter

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

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ECAT Physics Chapter 14 Electromagnetism Online Test MCQs With Answers

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