Solved Electricity and Magnetism (Physics Basics)

Electricity and Magnetism MCQs for Competitive Exams

Practice with answers, explanations, and exam-focused revision notes.

27 MCQs Page 1

Topic Notes: Electricity and Magnetism

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Electricity and Magnetism MCQs in General Science-Everyday Science are useful for candidates who need targeted practice for CSS, PMS, FPSC, PPSC, NTS, entry tests, and other competitive exams in Pakistan. This topic page is designed for quick revision, repeated practice, and exam-focused preparation.

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What is the physical mechanism behind the formation of lightning?

Water vapour produces electricity in the clouds

Clouds strike against impurities in air and the friction burns up these impurities

Similar charges of electricity rush towards each other and then get repelled

Strong opposite charges in different clouds breakdown the resistance offered by the intervening air

Report

What is the fundamental operating principle behind the functionality of a fluorescent tube light?

Chemical effect of current

Discharge of electricity through gases

Magnetic effect of current

Heating effect of current

Report

Which of the following statements regarding electrical charges is incorrect?

The presence of moisture in the air reduces the conductivity of charge

When a body is charged positively, some electrons escape from it

A body is said to be negatively charged when it has got some electrons

None of the above statements is correct

Report

What form of energy is converted into electrical energy by a generator?

Thermal

Mechanical

Potential

Chemical

Report

Which of the following is not considered an advantage of a three-phase electric power supply system compared to a single-phase system?

The output of a 3-phase machine is greater than that of a single phase machine

The output voltage is higher

The power consumption is less

The total output is almost constant

Report

The ohm is the standard unit of measurement for which physical quantity?

Heat

Length

Force

Resistance

Report

What energy conversion process occurs within a dynamo?

Mechanical energy into electrical energy

Electrical energy into mechanical energy

Mechanical energy into magnetic energy

None of these

Report

Which of the following effects can be produced by an electric current?

Chemical effect

Magnetic effect

Heating effect

All of these three

Report

Which material is most commonly utilized in the construction of electromagnets?

Iron

Cobalt

Nickel

Copper

Report

What is the fundamental physical principle behind the operation of an electric motor?

Electrical energy can be converted into chemical energy in the presence of magnetic fields

A conductor carrying current in the direction perpendicular to the external magnetic field feels a force

The current flowing through a conductor causes generation of heat that drives the engine

None of these

Report

Electricity and Magnetism MCQs for Competitive Exams

Electricity and Magnetism MCQs for Competitive Exams

Topic Notes: Electricity and Magnetism

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