Magnetic Fields: Interactive Learning Quizzes for Physics BSc

Question 1

The direction of the magnetic force between two parallel current-carrying wires depends on the direction of the currents. Which of the following statements describes the magnetic force correctly?

Accepted Answer

Attractive if currents are in the same direction, Repulsive if currents are in opposite directions

Answer

Repulsive if currents are in the same direction, Attractive if currents are in opposite directions

Answer

Attractive in both cases

Answer

Repulsive in both cases

Question 2

Which of the following materials has a high magnetic permeability, allowing it to concentrate magnetic fields?

Accepted Answer

Iron

Answer

Aluminum

Answer

Copper

Answer

Plastic

Question 3

Inside a long solenoid, the magnetic field is characterized by:

Accepted Answer

Uniform and parallel to the axis

Answer

Non-uniform and parallel to the axis

Answer

Uniform but perpendicular to the axis

Answer

Non-uniform and perpendicular to the axis

Question 4

Ampère's law establishes a fundamental relationship between:

Accepted Answer

Magnetic field and current density

Answer

Electric field and charge density

Answer

Voltage and current

Answer

Inductance and resistance

Question 5

The standard unit for measuring magnetic field strength is the:

Accepted Answer

Tesla

Answer

Weber

Answer

Ampere

Answer

Volt

Question 6

Which of the following is NOT a characteristic of magnetic fields?

Accepted Answer

They are always of uniform strength

Answer

They exert forces on moving charges

Answer

They are produced by moving charges

Answer

They can be shielded

Question 7

Which of the following is **not** a characteristic of magnetic materials?

Accepted Answer

High electrical conductivity

Answer

High magnetic permeability

Answer

Low coercivity

Answer

Attraction to magnets

Question 8

According to the right-hand rule, which direction does the magnetic field produced by a current-carrying wire point?

Accepted Answer

Perpendicular to the wire, in a counterclockwise direction

Answer

Parallel to the wire, in the same direction as the current

Answer

Perpendicular to the wire, in a clockwise direction

Question 9

The fundamental property of magnetic fields is that they

Accepted Answer

Exert a force on moving electric charges

Answer

Store energy

Answer

Can be created by electric currents

Answer

Are always perpendicular to electric fields

Question 10

Ampère's law is mathematically expressed as:

Accepted Answer

∮ B · dl = μ₀I

Answer

F = qvB

Answer

B = μ₀nI

Answer

V = IR

Question 11

Which of the following materials exhibits diamagnetic properties?

Accepted Answer

Aluminium

Answer

Iron

Answer

Copper

Answer

Cobalt

Question 12

Increasing the current in a solenoid results in:

Accepted Answer

Increased magnetic field strength

Answer

Decreased magnetic field strength

Answer

Reversed direction of the magnetic field

Answer

No change in the magnetic field

Question 13

The unit of magnetic flux is the:

Accepted Answer

Weber (Wb)

Answer

Tesla (T)

Answer

Ampere (A)

Answer

Volt (V)

Question 14

The magnetic moment of a current loop is:

Accepted Answer

Product of the current and the area enclosed by the loop

Answer

Ratio of the current to the area enclosed by the loop

Answer

Difference between the current and the area enclosed by the loop

Answer

Sum of the current and the area enclosed by the loop

Question 15

Magnetic shields are used to:

Accepted Answer

Block or weaken magnetic fields

Answer

Create magnetic fields

Answer

Amplify magnetic fields

Answer

Store magnetic energy

Question 16

Inside a solenoid, the magnetic field lines are:

Accepted Answer

Parallel to the axis of the solenoid

Answer

At an angle to the axis of the solenoid

Answer

There is no magnetic field inside a solenoid

Answer

Perpendicular to the axis of the solenoid

Question 17

Which material is classified as non-magnetic?

Accepted Answer

Copper

Answer

Iron

Answer

Cobalt

Answer

Nickel

Question 18

What is the SI unit for magnetic flux?

Accepted Answer

Weber (Wb)

Answer

Tesla (T)

Answer

Ampere (A)

Answer

Henry (H)

Question 19

How is the magnetic field strength related to the current flowing through a wire?

Accepted Answer

The magnetic field strength is directly proportional to the current

Answer

The magnetic field strength is inversely proportional to the current squared

Answer

The magnetic field strength is independent of the current

Answer

The magnetic field strength is inversely proportional to the current

Question 20

What is the direction of the magnetic force experienced by a moving charged particle in a magnetic field?

Accepted Answer

Perpendicular to both the velocity of the particle and the direction of the magnetic field

Answer

In the same direction as the velocity of the particle

Answer

Opposite to the direction of the velocity of the particle

Question 21

State Ampère's law.

Accepted Answer

Ampère's law relates the magnetic field around a current-carrying wire to the current flowing through the wire

Answer

Ampère's law relates the electric field around a charge to the charge

Question 22

What is the purpose of using a magnetic shield?

Accepted Answer

To reduce the strength of a magnetic field in a specific region

Answer

To store magnetic energy

Answer

To increase the strength of a magnetic field in a specific region

Answer

To deflect magnetic fields

Question 23

Which of the following is NOT a property of magnetic fields?

Accepted Answer

Magnetic fields cannot be shielded by non-magnetic materials.

Answer

Magnetic fields exert forces on moving charged particles

Answer

Magnetic fields can induce currents in conductors

Answer

Magnetic fields have both magnitude and direction