Electricity & Magnetism MCQs with Answers

Which statement is true about the magnetic poles?

• A.Magnetic poles are only found in permanent magnets
• B.A single magnetic pole can exist independently
• C.Like magnetic poles attract each other
• D.Magnetic poles always exist in pairs

An electric current in a solid metal conductor is a movement of _?

• A.Protons
• B.Electrons
• C.Neutrons
• D.Ions

The unit of electric field intensity other than N/C is ?

• A.C/V
• B.J/C
• C.W/A
• D.V/m

Keeping the cross-sectional area of a wire the same, if its length is doubled, the resistance will become ?

• A.Half
• B.Double
• C.Four times
• D.Remain the same

Past Paper MCQ

Function of salt in a battery is _?

• A.To act as an electrolyte
• B.To act as an insulator
• C.To act as a semiconductor
• D.To act as a catalyst

What is the minimum number of diodes required for full-wave rectification?

• A.2
• B.4
• C.1
• D.3

Ferromagnetic materials are obtained from _?

• A.Nickel
• B.Aluminum
• C.Copper
• D.Silver

In an electric circuit an ammeter is always connected in ?

• A.Series
• B.Parallel
• C.Both series and parallel
• D.None of these

A device which converts a physical quantity into voltage is called ?

• A.Actuator
• B.Transducer
• C.Sensor
• D.Amplifier

Which part of a bicycle dynamo spins to generate electricity?

• A.Coil
• B.Magnet
• C.Commutator
• D.Brush