Electricity & Magnetism MCQs with Answers

A small flashlight bulb draws 300 mA from its 1.5 V battery. What is the resistance of the bulb?

• A.500 Ω
• B.0.5 Ω
• C.50 Ω
• D.5 Ω

When the wire is connected and bulb is lit, this is called?

• A.Open Circuit
• B.Closed Circuit
• C.Short Circuit
• D.Broken Circuit

Which of the following is an insulator?

• A.Copper
• B.Glass
• C.Silver
• D.Iron

Find the power when the current is 51.2 milliampere (mA) and the voltage is 220 V.

• A.0.232 W
• B.112.64 W
• C.1.126 W
• D.11.26 W

The field inside a hollow spherical conductor is ?

• A.Equal to the field on the surface
• B.Maximum at the center
• C.Varies with distance from the surface
• D.Constantly zero

What is a transistor?

• A.An insulating material
• B.A type of resistor
• C.A magnetic storage device
• D.A semiconductor device

The velocity of an oscillating charge as it moves to and fro along a wire is _?

• A.Constant
• B.Infinite
• C.Zero
• D.Changing

What is the power factor for a series LCR circuit at resonance?

• A.0
• B.1
• C.0.5
• D.Infinity

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

• A.It will also blow
• B.It will remain the same
• C.It will glow brighter
• D.It will stop glowing

Magnetic lines are greater on?

• A.Poles of magnet
• B.Middle of magnet
• C.Sides of magnet
• D.None of these