Electricity & Magnetism MCQs with Answers

The magnetic induction B is also called the ?

• A.Magnetic flux
• B.Flux density
• C.Magnetic moment
• D.Magnetic permeability

A/an _ provides an incomplete path for the current to flow through.

• A.Parallel circuit
• B.Closed circuit
• C.Short circuit
• D.Open circuit

Ohm × Farad is equivalent to:

• A.Second
• B.Joule
• C.Coulomb
• D.Henry

An iron nail/steel rod can be magnetized by?

• A.Heating it to a high temperature
• B.Passing an electric current around it
• C.Hammering it repeatedly
• D.Dipping it in salt water

Which material among the following is an insulator and not a conductor?

• A.Copper
• B.Mica
• C.Silver
• D.Graphite

A battery is charging with an EMF of 12 V, internal resistance of 20 Ω, and current of 0.1 A. What is the terminal potential difference?

• A.10 V
• B.12 V
• C.14 V
• D.16 V

When a substance was heated, its conductivity was increased, what should it be out of the following?

• A.Conductors
• B.Insulators
• C.Semi-conductors
• D.Superconductors

The Coulomb's law states ?

• A.Force between two point charges is directly proportional to the sum of the charges and inversely proportional to the distance between them
• B.Force between two point charges is directly proportional to the square of the distance and inversely proportional to the product of the charges
• C.Force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them
• D.Force between two point charges is directly proportional to the distance and inversely proportional to the product of the charges

If the direction of the initial velocity of a charged particle is neither along nor perpendicular to the magnetic field, then the orbit will be?

• A.Straight line
• B.Circle
• C.Helix
• D.Parabola

When the PN junction is reverse-biased, its reverse current is of the order of:

• A.Amperes
• B.Milliamperes
• C.Microamperes
• D.Kiloamperes