Electricity & Magnetism MCQs with Answers

Semiconductors (e.g., germanium, silicon) are substances whose electrical conductivity lies in between?

• A.Conductors and superconductors
• B.Conductors and insulators
• C.Insulators and superconductors
• D.Metals and non-metals

The materials are called conductors if the electrons _?

• A.Do not exist in the material
• B.Are tightly bound to the nucleus
• C.Can move easily
• D.Move only in one fixed direction

The relationship between voltage, current, and resistance described by Ohm's law is _?

• A.Voltage = Current × Resistance
• B.Voltage = Current / Resistance
• C.Voltage = Current + Resistance
• D.Voltage = Resistance / Current

What are conductors?

• A.Materials that conduct electricity
• B.Materials that resist electricity
• C.Materials that store electricity
• D.Materials that generate electricity

In Ampere's law, the integration is over a ?

• A.Closed path
• B.Open surface
• C.Point charge
• D.Straight line

Which of the following is NOT a correct feature of electrolytic cells?

• A.Oxidation occurs at the anode and reduction at the cathode
• B.Electrical energy is converted into chemical energy
• C.Electrodes are dipped in an electrolyte solution
• D.Alternating current source is connected to electrodes

What is the typical voltage range for a handheld metal detector?

• A.6V – 9V
• B.12V – 24V
• C.1.5V – 3V
• D.220V – 240V

Past Paper MCQ

Multi-meter is an instrument that can be used to measure:

• A.Voltage
• B.Current
• C.Resistance
• D.All of these

When 4 equal resistors are connected in series with a battery they dissipate power of 10W. The power dissipated through any of them if connected across the same battery will be _?

• A.10 W
• B.20 W
• C.40 W
• D.160 W

A _ is a path in an electronic circuit.

• A.Circuitry
• B.Resistor
• C.Capacitor
• D.Transistor