Magnetic Fields MCQs with Answers

adminApril 3, 2024

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Welcome to the Magnetic Fields MCQs with Answers. In this post, we have shared Magnetic Fields Online Test for different competitive exams. Find practice Magnetic Fields Practice Questions with answers in Physics Tests exams here. Each question offers a chance to enhance your knowledge regarding Magnetic Fields.

Magnetic Fields Online Quiz

By presenting 3 options to choose from, Magnetic Fields Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Magnetic Fields Questions and Answers and click over the correct answer.

Test Name: Magnetic Fields MCQ Quiz Practice
Type: Quiz Test
Total Questions: 40
Total Marks: 40
Time: 40 minutes

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Magnetic Fields

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1 / 40

What is the effect of temperature on the magnetic properties of ferromagnetic materials?

Increases with increasing temperature

Decreases with increasing temperature

Remains the same with increasing temperature

2 / 40

Which law quantifies the force between two magnetic poles?

Faraday's law of induction

Coulomb's law for magnetism

Ampere's law of force

3 / 40

What is the main component of a magnetic compass?

Semiconductor

Electric coil

Magnetized needle

4 / 40

What type of magnetic material has a very small, positive susceptibility to magnetic fields?

Paramagnetic

Ferromagnetic

Diamagnetic

5 / 40

What is the Earth's magnetic field primarily caused by?

The atmosphere

Movements in the Earth's core

The oceans

6 / 40

Which material is commonly used for shielding sensitive electronic equipment from external magnetic fields?

Mu-metal

Copper

Aluminum

7 / 40

Which instrument measures the strength of a magnetic field?

Gaussmeter

Ammeter

Voltmeter

8 / 40

What does Lenz's Law state about induced current?

Has no effect on the change causing it

Opposes the change causing it

Enhances the change causing it

9 / 40

What is the phenomenon where certain materials can exhibit zero electrical resistance and expulsion of magnetic fields below a characteristic temperature?

Paramagnetism

Superconductivity

Ferromagnetism

10 / 40

What happens to a magnetic field when the distance from the source increases?

Remains the same

Decreases

Increases

11 / 40

What is the magnetic field inside a long, straight solenoid?

Non-uniform

Zero

Uniform

12 / 40

What is the SI unit of magnetic flux?

Weber

Gauss

Tesla

13 / 40

What is the term for materials that create their own magnetic fields?

Temporary magnets

Non-magnetic materials

Permanent magnets

14 / 40

What happens to the magnetic field inside a toroid as the number of turns increases?

Decreases

Increases

Remains the same

15 / 40

What is the area under the B-H curve of a ferromagnetic material a measure of?

Magnetic susceptibility

Magnetic permeability

Energy loss due to hysteresis

16 / 40

What type of current does a changing magnetic field induce in a closed loop?

Direct current

No current

Alternating current

17 / 40

How does a ferromagnetic material behave in an external magnetic field?

Strongly magnetized

Not magnetized

Weakly magnetized

18 / 40

What is the magnetic field at the center of a circular loop carrying current?

Tangential to the plane

Parallel to the plane

Perpendicular to the plane

19 / 40

Which rule determines the direction of the magnetic force on a moving charge?

Left-hand rule

Right-hand rule

Fleming's rule

20 / 40

What is the principle of a galvanometer?

Resistance in a circuit

Torque on a current-carrying coil

Capacitance in a circuit

21 / 40

What happens to the magnetic field of a permanent magnet if it is cut in half?

Only the larger piece retains magnetism

Each piece retains a north and south pole

Magnetism is lost completely

22 / 40

What does a moving charge create around itself?

Magnetic field

Gravitational field

Electric field

23 / 40

What law states that the magnetic field around a current-carrying conductor is proportional to the current?

Ohm's Law

Faraday's Law

Ampere's Law

24 / 40

What is the relationship between magnetic field strength and distance from a point source?

Inversely proportional

Exponentially proportional

Directly proportional

25 / 40

What is a hysteresis loop?

Graph of B versus H for a ferromagnetic material

Curve of F versus x for a spring

Plot of I versus V for a semiconductor

26 / 40

What happens to the magnetic field strength if the current in a solenoid is doubled?

Remains the same

Halves

Doubles

27 / 40

Which rule is used to determine the direction of induced current in a conductor moving through a magnetic field?

Fleming's right-hand rule

Fleming's left-hand rule

Right-hand grip rule

28 / 40

What is the magnetic effect of electric current called?

Electrolysis

Electromagnetism

Electrostatics

29 / 40

What is the typical use of a magnetic domain in technology?

Conducting electricity

Storing data in magnetic media

Measuring temperature

30 / 40

What is the unit of magnetic field strength?

Henry

Gauss

Tesla

31 / 40

What does the Biot-Savart Law relate to?

Gravitational field due to a mass

Magnetic field due to a current element

Electric field due to a charge

32 / 40

What type of materials are strongly attracted to magnets?

Paramagnetic

Diamagnetic

Ferromagnetic

33 / 40

What is the significance of the Curie temperature in magnetic materials?

Temperature above which a material loses its ferromagnetic properties

Temperature below which a material becomes diamagnetic

Temperature at which superconductivity occurs

34 / 40

How are the magnetic field lines oriented around a bar magnet?

From north to south

From south to north

Randomly

35 / 40

What happens to the direction of the magnetic field if the direction of current is reversed?

Remains the same

Reverses

Doubles in strength

36 / 40

What phenomenon causes a magnetic field to be produced around a conductor carrying an alternating current?

Electrostatic induction

Electrolysis

Electromagnetic induction

37 / 40

What device uses the principle of electromagnetic induction to convert mechanical energy into electrical energy?

Transformer

Motor

Generator

38 / 40

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

Random

Circular

Linear

39 / 40

Which scientist discovered electromagnetic induction?

Michael Faraday

Nikola Tesla

James Clerk Maxwell

40 / 40

What is the force between two parallel current-carrying conductors?

Only repulsive

Only attractive

Attractive or repulsive

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adminApril 3, 2024

0 6 1 minute read