Electricity & Magnetism MCQs with Answers

Past Paper MCQ

The potential of pure water is ?

• A.Fourteen
• B.One
• C.Seven
• D.Zero

In a dipole, the Gauss theorem value will be _?

• A.Depends on the charge magnitude
• B.1
• C.Infinity
• D.0

Why do electricians wear rubber gloves while touching electric wires?

• A.Rubber is a good conductor of electricity
• B.Rubber is a bad conductor of electricity
• C.Rubber increases the flow of current
• D.Rubber makes hands warm

The numerical value of orange color in color code carbon resistor is ?

• A.2
• B.3
• C.4
• D.5

The current produced due to induced emf depends upon?

• A.Resistance of the circuit
• B.Magnetic flux change
• C.Number of turns in the coil
• D.All of these

A _ is an electric circuit offering little or no resistance to the flow of electrons.

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

Current flows in one direction, has two terminals called cathode and anode, and current flows when positive voltage is applied to the anode and negative voltage to the cathode — these are the characteristics of which of the following devices?

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

Volt x Ampere is the measure of ?

• A.Resistance
• B.Energy
• C.Power
• D.Capacitance

Let an emf of 120 volt of negligible internal resistance connected across a resistance of 1000 ohm. Then the current flowing through the circuit will be ?

• A.0.012 A
• B.1.2 A
• C.12 A
• D.0.12 A

What is the typical voltage used in a handheld metal detector?

• A.1.5 to 9 volts
• B.12 to 24 volts
• C.110 to 220 volts
• D.0.5 to 1 volt