Electric and Magnetic Fields: Interactive Learning Quizzes for Year 13 Physics

Question 1

Determine the electric field intensity (E) at a specific point due to a point charge (q). Utilize Coulomb's constant (k).

Accepted Answer

E = k * q / r²

Answer

E = q * r / k

Answer

E = k / q * r

Answer

E = r / k * q

Question 2

In the historical development of electric and magnetic field theories, which scientist is NOT a key figure?

Accepted Answer

Albert Einstein

Answer

Michael Faraday

Answer

James Clerk Maxwell

Answer

Hans Christian Ørsted

Question 3

A positively charged particle is moving perpendicular to a uniform magnetic field. Describe the trajectory of the particle and explain the principles governing its motion.

Accepted Answer

The particle will move in a circular path in the plane perpendicular to the magnetic field.

Answer

The particle will move in a straight line perpendicular to both the magnetic field and its initial velocity.

Answer

The particle will move in an elliptical path in the plane perpendicular to the magnetic field.

Question 4

What device transforms mechanical energy into electrical energy through electromagnetic induction?

Accepted Answer

Generator

Answer

Fuse

Answer

Transformer

Answer

Resistor

Question 5

A positively charged particle is moving at an angle to a uniform magnetic field. Describe the trajectory of the particle, explaining the forces acting on it and how they influence its motion.

Accepted Answer

The particle will move in a helical path, with a circular motion around the magnetic field lines and a forward motion along the field lines.

Answer

The particle will move in a circular path perpendicular to the magnetic field.

Answer

The particle will move in a straight line parallel to the magnetic field.

Answer

The particle will move in a parabolic path.

Question 6

A proton enters a non-uniform magnetic field perpendicular to the field lines. The field strength increases as the proton moves through it. How will the proton's path change?

Accepted Answer

The proton will experience an increasing force and move in a circular path with an increasing radius.

Answer

The proton will experience a constant force and travel in a straight line.

Answer

The proton will experience a decreasing force and move in a circular path with a decreasing radius.

Answer

The proton will experience no force and continue moving in a straight line.

Question 7

Gauss's law states that the total electric flux through a closed surface is proportional to the:

Accepted Answer

Total charge enclosed by the surface.

Answer

Total current enclosed by the surface.

Answer

Surface area of the surface.

Answer

Permittivity of the medium inside the surface.

Question 8

A charged particle moving in a magnetic field experiences a force perpendicular to both:

Accepted Answer

Its velocity and the magnetic field.

Answer

Its acceleration and the magnetic field.

Answer

Its position and the magnetic field.

Answer

Its momentum and the magnetic field.

Question 9

Which of the following correctly describes the relationship established by Faraday's law of induction?

Accepted Answer

The rate of change of magnetic flux through a conductor induces an electromotive force (EMF) in the conductor.

Answer

The presence of a potential difference across a conductor results in a changing magnetic field around the conductor.

Answer

The strength of a magnetic field determines the current induced in a moving conductor.

Answer

The force experienced by a moving charge in a magnetic field is directly proportional to the charge's velocity.

Question 10

Within a conductor, the electric field is:

Accepted Answer

Zero.

Answer

Equal to the electric field outside the conductor.

Answer

Proportional to the surface charge density.

Answer

Inversely proportional to the conductivity of the conductor.

Question 11

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

Accepted Answer

Circular and perpendicular to the wire.

Answer

Radial and parallel to the wire.

Answer

Parallel and perpendicular to the wire.

Answer

Radial and perpendicular to the wire.

Question 12

The force between two parallel current-carrying wires is:

Accepted Answer

Attractive if the currents are in the same direction.

Answer

Repulsive if the currents are in the same direction.

Answer

Zero if the currents are in the same direction.

Answer

Attractive if the currents are in opposite directions.

Question 13

The magnetic permeability of a material is a measure of its ability to:

Accepted Answer

Transmit magnetic fields.

Answer

Conduct electric current.

Answer

Store magnetic energy.

Answer

Generate magnetic fields.

Question 14

A transformer is primarily used to:

Accepted Answer

Increase or decrease the voltage of an AC current.

Answer

Change the frequency of an AC current.

Answer

Convert AC current to DC current.

Answer

Store electrical energy.

Question 15

The electric field strength (E) at a distance (r) from a point charge (Q) is given by:

Accepted Answer

E = kQ/r^2

Answer

E = kQ/r

Answer

E = kQr

Answer

E = kQ/r^3

Question 16

Gauss's law states that the total electric flux through a closed surface is directly proportional to:

Accepted Answer

The net charge enclosed within the surface.

Answer

The surface area of the surface.

Answer

The volume enclosed by the surface.

Answer

The permittivity of the medium surrounding the surface.

Question 17

Faraday's law of electromagnetic induction describes which of the following phenomena?

Accepted Answer

Generation of an electromotive force (EMF) due to a changing magnetic field.

Answer

Production of a magnetic field due to a changing electric field.

Answer

Separation of electric charges in a material.

Answer

Flow of current in a conductor.

Question 18

When a current-carrying wire is placed in a magnetic field, the direction of the magnetic force on the wire is:

Accepted Answer

Perpendicular to both the current and the magnetic field.

Answer

Parallel to both the current and the magnetic field.

Answer

Antiparallel to both the current and the magnetic field.

Answer

There is no magnetic force on the wire.

Question 19

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

Accepted Answer

U = 1/2LI^2

Answer

U = 1/4LI^2

Answer

U = LI^2/2

Answer

U = LI^2/4

Question 20

下列哪一项是磁场强度的单位？

Accepted Answer

特斯拉

Answer

牛顿

Answer

库仑

Answer

伏特

Question 21

下列哪种器件利用了电磁感应原理？

Accepted Answer

电动机

Answer

太阳能电池

Answer

电容器

Answer

电阻

Question 22

存在磁场的空间区域称为:

Accepted Answer

磁场

Answer

磁通量

Answer

磁畴

Answer

磁矢量

Question 23

下列哪一项在电磁学中是一个标量？

Accepted Answer

电势

Answer

电场

Answer

磁通密度

Answer

磁场强度

Question 24

Consider a uniformly charged, solid conducting sphere. The electric field (E) within and outside the sphere is given by E = kQ/r^2 (outside) and E = 0 (inside), where k is Coulomb's constant, Q is the total charge on the sphere, and r is the distance from the center of the sphere. How does the electric potential (V) vary within and outside the sphere?

Accepted Answer

V = kQ/r outside the sphere and V = 0 inside the sphere

Answer

V = 0 outside the sphere and V = kQ/r inside the sphere

Answer

V = kQ/r^2 outside the sphere and V = 0 inside the sphere

Answer

V = 0 outside the sphere and V = kQ/r^2 inside the sphere

Question 25

Gauss's law is used to calculate the electric field due to a:

Accepted Answer

Any charge distribution with spherical symmetry

Answer

Point charge

Answer

Uniformly charged sphere

Answer

Infinitely long charged wire

Question 26

Which of the following materials is NOT a good conductor of electricity?

Accepted Answer

Rubber

Answer

Copper

Answer

Aluminum

Answer

Silver

Question 27

Faraday's law states that the electromotive force (emf) induced in a coil is directly proportional to:

Accepted Answer

The rate of change of magnetic flux through the coil

Answer

The strength of the magnetic field

Answer

The area of the coil

Answer

The resistance of the coil

Question 28

A step-up transformer is used to:

Accepted Answer

Increase the voltage of an AC signal

Answer

Decrease the voltage of an AC signal

Answer

Change AC to DC

Answer

Increase the current of an AC signal

Question 29

The unit of magnetic field strength in the SI system is the:

Accepted Answer

Tesla

Answer

Weber

Answer

Ampere

Answer

Gauss

Question 30

The direction of the magnetic force on a moving electron in a magnetic field is:

Accepted Answer

Perpendicular to both the electric and magnetic fields

Answer

Parallel to the electric field

Answer

Antiparallel to the electric field

Answer

Parallel to the magnetic field

Question 31

The electric field strength **E** inside a parallel-plate capacitor is directly proportional to:

Accepted Answer

The potential difference **V** across the capacitor

Answer

The capacitance **C** of the capacitor

Answer

The charge **Q** stored on the capacitor

Answer

The distance **d** between the plates of the capacitor

Question 32

What is a key characteristic of magnetic resonance imaging (MRI)?

Accepted Answer

MRI is a non-invasive imaging technique.

Answer

MRI employs X-rays for image generation.

Answer

MRI is solely used for brain imaging.

Answer

MRI can provide real-time moving images.

Question 33

Gauss's law states that the net electric flux through a closed surface is proportional to the:

Accepted Answer

Total charge **Q** enclosed by the surface

Answer

Magnitude of the electric field **E** on the surface

Answer

Area **A** of the surface

Answer

Permittivity **ε** of the medium

Question 34

Faraday's law of electromagnetic induction states that the electromotive force (EMF) induced in a coil is proportional to the:

Accepted Answer

Rate of change of magnetic flux **Φ** through the coil

Answer

Current **I** flowing through the coil

Answer

Magnetic field strength **B** around the coil

Answer

Area **A** of the coil

Question 35

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

Accepted Answer

Uniform and parallel to the wire

Answer

Uniform and perpendicular to the wire

Answer

Non-uniform and parallel to the wire

Answer

Non-uniform and perpendicular to the wire

Question 36

Which of the following materials is **NOT** ferromagnetic?

Accepted Answer

Copper

Answer

Iron

Answer

Steel

Answer

Nickel

Question 37

The hysteresis loop of a ferromagnetic material represents:

Accepted Answer

The relationship between the magnetic field strength and the magnetization of the material

Answer

The relationship between the current and the voltage in a circuit containing the material

Answer

The relationship between the temperature and the resistivity of the material

Answer

The relationship between the frequency and the reactance of the material

Question 38

A charged particle with charge q moves with velocity v perpendicular to a uniform magnetic field B. The magnetic force experienced by the particle is:

Accepted Answer

qBv

Answer

qvB/2

Answer

qvB^2

Answer

0

Question 39

Faraday's law of electromagnetic induction states that the electromotive force (EMF) induced in a circuit is:

Accepted Answer

Equal to the rate of change of magnetic flux through the circuit

Answer

Equal to the magnetic flux through the circuit

Answer

Equal to the current flowing through the circuit

Answer

Equal to the voltage across the circuit

Question 40

A conducting rod of length L is moved perpendicularly to a magnetic field B with a constant velocity v. The potential difference developed across the ends of the rod is:

Accepted Answer

BLv

Answer

BLv/2

Answer

BL^2v

Answer

0

Question 41

Which device operates on the principle of electromagnetic induction?

Accepted Answer

Transformer

Answer

Capacitor

Answer

Resistor

Answer

Transistor

Question 42

The magnetic field inside a long solenoid is:

Accepted Answer

Uniform and parallel to its axis

Answer

Non-uniform and parallel to its axis

Answer

Uniform and perpendicular to its axis

Answer

Non-uniform and perpendicular to its axis

Question 43

The SI unit of magnetic flux density is the:

Accepted Answer

Tesla (T)

Answer

Weber (Wb)

Answer

Ampere (A)

Answer

Volt (V)

Question 44

To measure the magnetic field strength around a current-carrying wire using a Hall probe, which orientation should the probe be placed in?

Accepted Answer

Perpendicular to the magnetic field lines

Answer

Parallel to the magnetic field lines

Answer

At an angle to the magnetic field lines

Answer

Inside the current-carrying wire

Question 45

According to Gauss's law, the electric flux through a closed surface is proportional to the:

Accepted Answer

Total electric charge enclosed by the surface

Answer

Surface area of the surface

Answer

Permittivity of the material inside the surface

Answer

Volume enclosed by the surface

Question 46

Faraday's law of electromagnetic induction states that the emf induced in a closed loop is:

Accepted Answer

Equal to the negative rate of change of magnetic flux through the loop

Answer

Equal to the product of the current in the loop and the magnetic field

Answer

Proportional to the area of the loop

Answer

Independent of the material of the loop

Question 47

A current-carrying wire placed in a magnetic field will experience a magnetic force that is:

Accepted Answer

Perpendicular to both the current and the magnetic field

Answer

Parallel to both the current and the magnetic field

Answer

Perpendicular to the current

Answer

Parallel to the magnetic field

Question 48

Which of the following is not a type of magnetic material?

Accepted Answer

Superconducting

Answer

Diamagnetic

Answer

Paramagnetic

Answer

Ferromagnetic

Question 49

A transformer is used to:

Accepted Answer

Change the voltage of an AC current

Answer

Change the current of an AC current

Answer

Convert AC current to DC current

Answer

Store electrical energy

Question 50

According to Faraday's law, what causes the generation of an electric field?

Accepted Answer

Creation of a varying magnetic field

Answer

Movement of electric charges

Answer

Displacement of magnetic poles

Answer

Influence of a changing electric field

Question 51

Which of the following is NOT a key development in the understanding of electromagnetism?

Accepted Answer

Einstein's theory of relativity

Answer

Faraday's experiments on electromagnetic induction

Answer

Maxwell's equations unifying electric and magnetic fields

Answer

Coulomb's law describing electrostatic interactions

Question 52

Particle accelerators and mass spectrometers utilize magnetic fields for diverse purposes. Describe how magnetic fields are employed in each of these devices.

Accepted Answer

Particle accelerators utilize magnetic fields to:

Accepted Answer

Mass spectrometers utilize magnetic fields to:

Answer

Magnetic resonance imaging systems utilize magnetic fields to:

Question 53

Which material type displays the most pronounced magnetic characteristics?

Accepted Answer

Ferromagnetic

Answer

Diamagnetic

Answer

Paramagnetic

Answer

Antiferromagnetic

Question 54

Gauss's law states that the electric flux through any closed surface is proportional to the:

Accepted Answer

Charge enclosed by the surface.

Answer

Area of the surface.

Answer

Permittivity of the medium.

Answer

Potential difference between the surface and infinity.

Question 55

A transformer is primarily used to:

Accepted Answer

Increase or decrease voltage.

Answer

Increase or decrease current.

Answer

Change AC to DC.

Answer

Change DC to AC.

Question 56

The force experienced by a moving charged particle in a magnetic field is:

Accepted Answer

Perpendicular to the particle's velocity.

Answer

Parallel to the particle's velocity.

Answer

In the same direction as the magnetic field.

Answer

Opposite to the magnetic field.

Question 57

The magnetic field inside a solenoid is:

Accepted Answer

Uniform.

Answer

Zero.

Answer

Non-uniform.

Answer

Depends on the current.

Question 58

The unit of inductance is:

Accepted Answer

Henrys.

Answer

Farads.

Answer

Ohms.

Answer

Volts.

Question 59

The direction of the magnetic force on a current-carrying wire in a magnetic field is determined by:

Accepted Answer

Fleming's left-hand rule.

Answer

Fleming's right-hand rule.

Answer

Lenz's law.

Answer

Gauss's law.

Question 60

Gauss's Law states that the total electric flux passing through any closed surface is proportional to:

Accepted Answer

The net charge enclosed by the surface.

Answer

The magnitude of the electric field at the surface.

Answer

The potential difference across the surface.

Answer

The area of the surface.

Question 61

Which of the following is the primary cause of the force experienced by a charged particle moving within a magnetic field?

Accepted Answer

The interaction between the particle's charge and the magnetic field.

Answer

The electrostatic force between the particle and the magnet.

Answer

The gravitational force between the particle and the magnet.

Question 62

Which device operates based on the principle of electromagnetic induction?

Accepted Answer

Transformer

Answer

Diode

Answer

Resistor

Answer

Capacitor

Question 63

Which of the following materials exhibits diamagnetic properties?

Accepted Answer

Copper

Answer

Iron

Answer

Nickel

Answer

Cobalt

Question 64

The torque experienced by a current-carrying loop within a magnetic field is:

Accepted Answer

Proportional to the strength of the magnetic field, the current flowing through the loop, and the area of the loop.

Answer

Solely dependent on the current flowing through the loop.

Answer

Solely dependent on the strength of the magnetic field.