Electricity & Magnetism MCQs with Answers

A D.C motor converts _?

• A.Electrical energy into mechanical energy
• B.Mechanical energy into electrical energy
• C.Heat energy into electrical energy
• D.Chemical energy into mechanical energy

01 V is equal to?

• A.1 N m⁻¹
• B.1 C J⁻¹
• C.1 J s⁻¹
• D.1 J C⁻¹

Which of the following performs its function by converting electrical energy into motion?

• A.An electric motor
• B.A loudspeaker
• C.An electric generator
• D.A transformer

The work done on a unit charge against electric field intensity is called?

• A.Electric current
• B.Electric capacitance
• C.Electric resistance
• D.Electric potential

Wheatstone bridge is ?

• A.A type of microscope
• B.A chemical compound
• C.A measuring scale
• D.A circuit

Eddy currents are set up in a direction ?

• A.Parallel to the flux
• B.Along the direction of current
• C.Perpendicular to the flux
• D.Opposite to the magnetic field

An electron enters a magnetic field acting vertically downward with velocity v from east. The electron is deflected along?

• A.North
• B.South
• C.East
• D.West

The general generator works on the principle of ?

• A.Electromagnetic induction
• B.Electrostatic induction
• C.Thermionic emission
• D.Photoelectric effect

A square loop of wire lies in the plane of the page. A decreasing magnetic field is directed into the page. The induced current in the loop is ?

• A.Clockwise
• B.Alternating
• C.Zero
• D.Counterclockwise

Which one of the following devices stores energy within itself in the form of magnetic field?

• A.Capacitor
• B.Inductor
• C.Resistor
• D.Transformer