Welcome to the Magnetism and Electromagnetism MCQs with Answers. In this post, we are sharing Magnetism and Electromagnetism Multiple Choice Questions and Answers in Everyday Science section for various competitive exams in Pakistan. Each question offers a chance to enhance your knowledge regarding Magnetism and Electromagnetism online MCQs Test.
What is the unit of magnetic flux?
a) Tesla
b) Weber
c) Ampere
d) Henry
Which material is commonly used to make permanent magnets?
a) Iron
b) Aluminum
c) Copper
d) Silver
What is the direction of the magnetic field lines around a current-carrying conductor?
a) From south to north
b) From north to south
c) In circular loops around the conductor
d) In straight lines along the conductor
What happens to the magnetic field inside a solenoid when the current through it increases?
a) It decreases
b) It remains the same
c) It increases
d) It reverses direction
Which law states that the induced electromotive force (EMF) in a circuit is proportional to the rate of change of the magnetic flux through the circuit?
a) Faraday’s Law
b) Ohm’s Law
c) Ampere’s Law
d) Lenz’s Law
What is the effect of placing a magnetic material inside a coil of wire carrying a current?
a) It decreases the magnetic field strength
b) It has no effect
c) It increases the magnetic field strength
d) It reverses the magnetic field direction
What type of magnetism is exhibited by materials that can be magnetized but do not retain their magnetism when the external field is removed?
a) Ferromagnetism
b) Paramagnetism
c) Diamagnetism
d) Antiferromagnetism
What is the term for a material that creates a magnetic field in response to an applied electric current?
a) Magnetic flux
b) Magnetic dipole
c) Electromagnet
d) Permanent magnet
Which of the following factors affects the strength of an electromagnet?
a) Number of coils
b) Type of wire
c) Magnetic field of the Earth
d) Shape of the magnet
What does the right-hand rule for a current-carrying wire determine?
a) The direction of the magnetic field
b) The magnitude of the current
c) The direction of the electric field
d) The rate of change of flux
Which law describes the force between two current-carrying conductors?
a) Ohm’s Law
b) Coulomb’s Law
c) Ampere’s Law
d) Faraday’s Law
What is the relationship between electric current and magnetic field in a solenoid?
a) Directly proportional
b) Inversely proportional
c) No relation
d) Exponentially proportional
Which of the following materials is commonly used as a core in transformers to enhance magnetic flux?
a) Iron
b) Copper
c) Aluminum
d) Plastic
What phenomenon occurs when a magnetic field is used to generate an electric current?
a) Electromagnetic induction
b) Magnetic resonance
c) Magnetic flux
d) Magnetic polarization
Which type of current is generated by an alternator?
a) Direct current
b) Alternating current
c) Pulsating current
d) Static current
In which direction do magnetic field lines point inside a magnet?
a) From north to south
b) From south to north
c) In circular loops around the magnet
d) From the center outwards
What is the name of the force experienced by a charged particle moving through a magnetic field?
a) Lorentz force
b) Coulomb force
c) Gravitational force
d) Centripetal force
Which instrument is used to measure the strength of a magnetic field?
a) Ammeter
b) Voltmeter
c) Gaussmeter
d) Thermometer
What type of magnetism is exhibited by materials like bismuth and graphite?
a) Paramagnetism
b) Ferromagnetism
c) Diamagnetism
d) Antiferromagnetism
Which of the following best describes the magnetic field of a bar magnet?
a) Uniform
b) Irregular
c) Circular
d) Radial
What is the primary factor that determines the strength of a magnetic field in a solenoid?
a) Current through the solenoid
b) Temperature of the solenoid
c) Length of the solenoid
d) Material of the solenoid
What is the effect of increasing the number of turns in a solenoid?
a) It decreases the magnetic field strength
b) It increases the magnetic field strength
c) It has no effect
d) It reverses the magnetic field direction
Which of the following materials is used to create a magnetic field in a magnetron?
a) Steel
b) Aluminum
c) Iron
d) Nickel
What does the term “magnetic flux” refer to?
a) The number of magnetic field lines passing through a surface
b) The strength of the magnetic field
c) The direction of the magnetic field
d) The speed of a magnetic field change
What is the primary function of a magnetic compass?
a) To measure the strength of a magnetic field
b) To indicate the direction of the Earth’s magnetic field
c) To generate a magnetic field
d) To measure electric current
What is the principle behind the operation of an electric motor?
a) Electromagnetic induction
b) Magnetic repulsion
c) Magnetic attraction
d) Lorentz force
Which of the following is a property of ferromagnetic materials?
a) They cannot be magnetized
b) They retain their magnetism after the external field is removed
c) They are repelled by magnets
d) They have weak magnetic properties
In which direction do magnetic field lines point outside a magnet?
a) From south to north
b) From north to south
c) In a circular path
d) From the center to the edge
What effect does a magnetic field have on a charged particle moving perpendicular to it?
a) It increases the speed of the particle
b) It decreases the speed of the particle
c) It changes the direction of the particle’s motion
d) It has no effect on the particle
What phenomenon occurs when an electric current produces a magnetic field?
a) Electromagnetic induction
b) Magnetic resonance
c) Ampere’s effect
d) Faraday’s effect
Which device uses the principle of electromagnetic induction to generate electrical energy?
a) Transformer
b) Motor
c) Generator
d) Capacitor
What is the primary function of a transformer in an electrical circuit?
a) To increase or decrease voltage
b) To generate electrical energy
c) To measure magnetic flux
d) To store electrical energy
What happens to the magnetic field strength of a solenoid if the core material is replaced with a non-magnetic material?
a) It increases
b) It decreases
c) It remains the same
d) It becomes erratic
Which device uses a moving coil to measure magnetic fields?
a) Galvanometer
b) Thermometer
c) Voltmeter
d) Ammeter
What does the term “Lenz’s Law” describe?
a) The direction of induced EMF
b) The strength of magnetic fields
c) The rate of magnetic field change
d) The force between magnetic poles
What type of electromagnetic wave is used in radio communication?
a) Infrared
b) Microwaves
c) X-rays
d) Radio waves
Which principle explains the operation of a magnetic resonance imaging (MRI) machine?
a) Electromagnetic induction
b) Magnetic resonance
c) Faraday’s Law
d) Ampere’s Law
What is the primary cause of Earth’s magnetic field?
a) The movement of molten iron in the outer core
b) The rotation of the Earth
c) The presence of iron deposits
d) Solar winds
Which device converts electrical energy into mechanical energy using magnetic fields?
a) Transformer
b) Generator
c) Motor
d) Battery
What type of current is generated by a battery?
a) Alternating current
b) Direct current
c) Pulsating current
d) Static current
Which principle is used in the operation of a dynamo?
a) Electromagnetic induction
b) Magnetic resonance
c) Faraday’s Law
d) Lenz’s Law
What happens to the magnetic field strength if the current in an electromagnet is increased?
a) It decreases
b) It remains the same
c) It increases
d) It reverses direction
Which of the following materials would be a good core material for an electromagnet?
a) Iron
b) Wood
c) Plastic
d) Glass
What is the primary effect of an electric current passing through a conductor in a magnetic field?
a) It generates a force on the conductor
b) It changes the conductor’s temperature
c) It decreases the magnetic field strength
d) It creates an electric field
Which of the following is not a characteristic of ferromagnetic materials?
a) High magnetic permeability
b) Ability to retain magnetization
c) Magnetic fields are temporary
d) Alignment of magnetic domains
If you are interested to enhance your knowledge regarding Physics, Chemistry, Computer, and Biology please click on the link of each category, you will be redirected to dedicated website for each category.
