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 type of materials are strongly attracted to magnets?

Diamagnetic

Ferromagnetic

Paramagnetic

2 / 40

What is the SI unit of magnetic flux?

Gauss

Tesla

Weber

3 / 40

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

Circular

Linear

Random

4 / 40

What is the unit of magnetic field strength?

Henry

Tesla

Gauss

5 / 40

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

Reverses

Doubles in strength

Remains the same

6 / 40

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

From north to south

Randomly

From south to north

7 / 40

Which scientist discovered electromagnetic induction?

James Clerk Maxwell

Michael Faraday

Nikola Tesla

8 / 40

What is a hysteresis loop?

Graph of B versus H for a ferromagnetic material

Plot of I versus V for a semiconductor

Curve of F versus x for a spring

9 / 40

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

Exponentially proportional

Inversely proportional

Directly proportional

10 / 40

Which instrument measures the strength of a magnetic field?

Voltmeter

Ammeter

Gaussmeter

11 / 40

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

Movements in the Earth's core

The oceans

The atmosphere

12 / 40

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

Energy loss due to hysteresis

Magnetic permeability

Magnetic susceptibility

13 / 40

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

Storing data in magnetic media

Measuring temperature

Conducting electricity

14 / 40

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

Aluminum

Copper

Mu-metal

15 / 40

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

Superconductivity

Paramagnetism

Ferromagnetism

16 / 40

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

Transformer

Generator

Motor

17 / 40

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

Fleming's rule

Right-hand rule

Left-hand rule

18 / 40

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

Alternating current

Direct current

No current

19 / 40

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

Only attractive

Only repulsive

Attractive or repulsive

20 / 40

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

Remains the same with increasing temperature

Decreases with increasing temperature

Increases with increasing temperature

21 / 40

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

Electromagnetic induction

Electrolysis

Electrostatic induction

22 / 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

23 / 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

24 / 40

What is the magnetic effect of electric current called?

Electrolysis

Electrostatics

Electromagnetism

25 / 40

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

Increases

Decreases

Remains the same

26 / 40

What does Lenz's Law state about induced current?

Enhances the change causing it

Has no effect on the change causing it

Opposes the change causing it

27 / 40

What is the principle of a galvanometer?

Torque on a current-carrying coil

Capacitance in a circuit

Resistance in a circuit

28 / 40

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

Doubles

Halves

Remains the same

29 / 40

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

Temporary magnets

Permanent magnets

Non-magnetic materials

30 / 40

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

Faraday's Law

Ampere's Law

Ohm's Law

31 / 40

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

Uniform

Non-uniform

Zero

32 / 40

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

Weakly magnetized

Not magnetized

Strongly magnetized

33 / 40

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

Each piece retains a north and south pole

Magnetism is lost completely

Only the larger piece retains magnetism

34 / 40

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

Temperature at which superconductivity occurs

Temperature below which a material becomes diamagnetic

Temperature above which a material loses its ferromagnetic properties

35 / 40

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

Ferromagnetic

Paramagnetic

Diamagnetic

36 / 40

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

Fleming's left-hand rule

Right-hand grip rule

Fleming's right-hand rule

37 / 40

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

Perpendicular to the plane

Parallel to the plane

Tangential to the plane

38 / 40

What is the main component of a magnetic compass?

Semiconductor

Electric coil

Magnetized needle

39 / 40

What does a moving charge create around itself?

Magnetic field

Gravitational field

Electric field

40 / 40

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

Decreases

Remains the same

Increases

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adminApril 3, 2024

0 5 1 minute read