Magnetic Fields: Interactive Learning Quizzes for Year 13 Physics

Question 1

A long, straight wire carries a current. The direction of the magnetic field at a point perpendicular to the wire is:

Accepted Answer

Perpendicular to the wire

Answer

Radially inward

Answer

Radially outward

Answer

Tangential to the circular path

Question 2

The magnetic force on a moving charge is:

Accepted Answer

Always perpendicular to both the magnetic field and the velocity of the charge

Answer

Always parallel to both the magnetic field and the velocity of the charge

Answer

Always zero if the charge is moving parallel to the magnetic field

Answer

Proportional to the square of the charge's velocity

Question 3

Two long, parallel wires carry currents in the same direction. The magnetic field between the wires is:

Accepted Answer

Uniform and parallel to the wires

Answer

Zero

Answer

Uniform and perpendicular to the wires

Answer

Non-uniform and depends on the distance between the wires

Question 4

The magnetic field inside a solenoid is:

Accepted Answer

Uniform and parallel to the axis of the solenoid

Answer

Uniform and perpendicular to the axis of the solenoid

Answer

Non-uniform and depends on the position within the solenoid

Answer

Zero

Question 5

An iron core is inserted into a solenoid. The magnetic field inside the solenoid will:

Accepted Answer

Increase

Answer

Decrease

Answer

Not change

Answer

Reverse direction

Question 6

When a bar magnet is moved towards a stationary coil of wire, an electric current is induced in the coil. This phenomenon is known as:

Accepted Answer

Electromagnetic induction

Answer

Magnetic resonance

Answer

Faraday's law

Answer

Lenz's law

Question 7

What is the SI unit of magnetic field strength?

Accepted Answer

Tesla

Answer

Weber

Answer

Ampere

Answer

Volt

Question 8

The magnetic field inside a long solenoid is:

Accepted Answer

Uniform and parallel to the axis of the solenoid

Answer

Non-uniform and parallel to the axis of the solenoid

Answer

Uniform and perpendicular to the axis of the solenoid

Answer

Non-uniform and perpendicular to the axis of the solenoid

Question 9

The magnetic moment of a current loop is defined as:

Accepted Answer

The product of the current and the area of the loop

Answer

The product of the current and the magnetic field strength

Answer

The cross product of the current and the normal to the loop

Answer

The dot product of the current and the magnetic field strength

Question 10

When a paramagnetic material is placed in a magnetic field, it:

Accepted Answer

Becomes magnetized in the same direction as the magnetic field

Answer

Becomes magnetized in the opposite direction to the magnetic field

Answer

Does not become magnetized

Answer

Becomes a permanent magnet

Question 11

The primary purpose of a magnetic core in an inductor is to:

Accepted Answer

Increase the inductance of the inductor

Answer

Decrease the inductance of the inductor

Answer

Prevent saturation of the inductor

Answer

Reduce the resistance of the inductor

Question 12

A charged particle moving perpendicular to a magnetic field experiences a force due to the magnetic field. Which of the following statements about the direction of the force is correct?

Accepted Answer

The force is perpendicular to both the particle's velocity and the magnetic field

Answer

The force is in the same direction as the particle's velocity

Answer

The force is in the opposite direction as the particle's velocity

Answer

The force is at an angle to both the particle's velocity and the magnetic field

Question 13

The magnetic permeability of a material is a measure of its ability to conduct magnetic flux. Which of the following materials has the highest magnetic permeability?

Accepted Answer

Iron

Answer

Air

Answer

Copper

Answer

Aluminum

Question 14

Which of the following is NOT a property of diamagnetic materials?

Accepted Answer

High electrical conductivity

Answer

Weakly repelled by magnets

Answer

Negative magnetic permeability

Answer

Induced magnetization opposite to the applied magnetic field

Question 15

A current-carrying wire is placed in a magnetic field. What is the direction of the magnetic force acting on the wire?

Accepted Answer

Perpendicular to both the magnetic field and the current

Answer

Antiparallel to the current

Answer

Parallel to the magnetic field

Question 16

A bar magnet is placed inside a solenoid. What effect does this have on the magnetic field inside the solenoid?

Accepted Answer

Increases the magnetic field

Answer

Reverses the direction of the magnetic field

Answer

Decreases the magnetic field

Answer

Has no effect on the magnetic field

Question 17

A charged particle enters a magnetic field with a velocity perpendicular to the field. What is the trajectory of the particle?

Accepted Answer

Circular

Answer

Rectilinear

Answer

Parabolic

Answer

Elliptical

Question 18

The magnetic field around a long straight wire carrying a current is

Accepted Answer

Circular

Answer

Elliptical

Answer

Parallel

Answer

Radial

Question 19

Describe the magnetic field lines around a current-carrying wire.

Accepted Answer

Concentric circles

Answer

Straight lines perpendicular to the wire

Answer

Straight lines parallel to the wire

Answer

Elliptical lines

Question 20

Which of the following materials exhibits ferromagnetism?

Accepted Answer

Iron

Answer

Aluminum

Answer

Copper

Answer

Silver

Question 21

When a coil of wire is placed in a magnetic field and connected to a voltmeter, what happens to the voltmeter reading when the magnetic field strength is increased?

Accepted Answer

Increases

Answer

Fluctuates

Answer

Decreases

Answer

Remains the same

Question 22

To convert a moving coil galvanometer into an ammeter, what should be connected in parallel?

Accepted Answer

A low resistance

Answer

A high resistance in series

Answer

A low resistance in series

Answer

A high resistance