Electricity & Magnetism MCQs with Answers

In which direction does a compass needle always point?

• A.East
• B.South
• C.North
• D.West

A network which contains one or more sources of EMF is known as ?

• A.Passive Network
• B.Active Network
• C.Linear Network
• D.Bilateral Network

Past Paper MCQ

The SI unit of electric current is _?

• A.Volt
• B.Ampere
• C.Ohm
• D.Watt

Never connect Ohm's meter on _ circuits.

• A.Live
• B.Open
• C.Short
• D.Closed

Which of the following is the correct relation between current density and magnetization?

• A.J = Curl(M)
• B.J = Div(M)
• C.J = Grad(M)
• D.J = Curl(B)

DIAC is ?

• A.An AC switch
• B.A DC switch
• C.A rectifier
• D.A voltage regulator

Which metal is used to make filaments in electric light bulbs?

• A.Copper
• B.Tungsten
• C.Nichrome
• D.Aluminum

Which part of a D.C motor reverses the direction of current through the coil every half-cycle?

• A.Armature
• B.Field magnet
• C.Carbon brushes
• D.Commutator

Two bulbs are connected in a series circuit. If one bulb blows (blasts), what will happen to the other bulb?

• A.It will keep glowing normally
• B.It will glow brighter
• C.It will also blow (blast)
• D.It will glow dimmer

Dielectric field created by positive charges ?

• A.Radially inward
• B.Radially outward
• C.Tangential to the charge
• D.Circular around the charge