Master Electrical and Magnetic Fundamentals: Interactive Learning Quizzes

Question 1

In a uniform magnetic field, the force experienced by a positive charge is:

Accepted Answer

Perpendicular to the field

Answer

Parallel to the field

Answer

Antiparallel to the field

Answer

Zero

Question 2

The property of a material that determines its ability to conduct electric current is:

Accepted Answer

Conductivity

Answer

Resistivity

Answer

Capacitance

Answer

Permeability

Question 3

The SI unit of magnetic flux density is:

Accepted Answer

Tesla

Answer

Weber

Answer

Ampere

Answer

Volt

Question 4

In a charge-free region, the divergence of the electric field (∇⋅E) is:

Accepted Answer

Zero

Answer

Positive

Answer

Negative

Answer

Dependent on the permittivity of the medium

Question 5

The curl of the magnetic field (∇×B) is directly proportional to:

Accepted Answer

Current density

Answer

Electric field

Answer

Charge density

Answer

Voltage

Question 6

The energy (U) stored in a capacitor is given by:

Accepted Answer

U = 1/2 CV²

Answer

U = CV

Answer

U = 1/2 LI²

Answer

U = LI

Question 7

A characteristic property of ferromagnetic materials is:

Accepted Answer

High permeability

Answer

Low coercivity

Answer

Low retentivity

Answer

High resistivity

Question 8

The resonant frequency of an LC circuit depends on:

Accepted Answer

Inductance and capacitance

Answer

Voltage and current

Answer

Resistance and capacitance

Answer

Voltage and inductance

Question 9

Which property is unique to electric fields, not shared by magnetic fields?

Accepted Answer

Exertion of forces on stationary charged particles

Answer

Generation by moving charges

Answer

Energy storage

Question 10

What is the SI unit of electric field strength?

Accepted Answer

Volt per meter (V/m)

Answer

Coulomb (C)

Answer

Newton per meter (N/m)

Answer

Tesla (T)

Question 11

What is the direction of the magnetic field around a current-carrying wire?

Accepted Answer

Circular around the wire

Answer

Perpendicular to the wire

Answer

Parallel to the wire

Answer

Away from the wire

Question 12

Which material is a good electrical conductor?

Accepted Answer

Gold

Answer

Rubber

Answer

Wood

Answer

Glass

Question 13

What is a characteristic of an ideal inductor?

Accepted Answer

Zero resistance

Answer

Infinite resistance

Answer

Infinite inductance

Answer

Zero inductance

Question 14

Which law determines the direction of induced EMF in a generator?

Accepted Answer

Lenz's law

Answer

Ohm's law

Answer

Faraday's law

Answer

Ampère's law

Question 15

An electric field is a region of space around an electric charge where other charges experience:

Accepted Answer

A Coulomb force

Answer

An acceleration

Answer

A displacement

Answer

An electric torque

Question 16

The SI unit of electric potential is the:

Accepted Answer

Volt

Answer

Coulomb

Answer

Ampere

Answer

Tesla

Question 17

A transformer is primarily used to:

Accepted Answer

Change the voltage level of an AC signal

Answer

Convert AC to DC

Answer

Convert DC to AC

Answer

Store electrical energy in a magnetic field

Question 18

The relationship between voltage, current, and resistance in a resistor is known as:

Accepted Answer

Ohm's law

Answer

Kirchhoff's voltage law

Answer

Kirchhoff's current law

Answer

Faraday's law of induction

Question 19

The magnetic field produced around a current-carrying wire is:

Accepted Answer

Circular

Answer

Elliptical

Answer

Parabolic

Answer

Hyperbolic

Question 20

The capacitance of a capacitor is measured in:

Accepted Answer

Farads

Answer

Henrys

Answer

Ohms

Answer

Sieverts

Question 21

Inductance is defined as the ratio of:

Accepted Answer

Magnetic flux linkage to current

Answer

Voltage to current

Answer

Current to flux linkage

Answer

Capacitance to resistance

Question 22

The root-mean-square (RMS) voltage of a sinusoidal waveform is:

Accepted Answer

Equal to √2 times its peak voltage

Answer

Equal to its peak voltage

Answer

Half of its peak voltage

Answer

Equal to 1/√2 times its peak voltage