Magnetism Class 10th Question Bank
What is magnetism?
Magnetism is the property of materials that exert a force on other materials that have magnetic properties.
What is a magnetic field?
A magnetic field is the region surrounding a magnet in which a magnetic force can be felt.
What is the direction of the magnetic field?
The direction of the magnetic field is from the north pole of a magnet to its south pole.
What is the unit of magnetic field?
The unit of magnetic field is Tesla (T).
What is the difference between magnetic field and magnetic force?
The magnetic field is a region around a magnet where the magnetic force is exerted.
What is the formula for the magnetic force on a charged particle moving in a magnetic field?
The formula for the magnetic force on a charged particle moving in a magnetic field is F = qvBsinθ, where q is the charge, v is the velocity, B is the magnetic field, and θ is the angle between v and B.
What is the right-hand rule for magnetic fields?
The right-hand rule for magnetic fields states that if you point your right thumb in the direction of the velocity of a positively charged particle and your fingers in the direction of the magnetic field, your palm will face the direction of the magnetic force.
What is an electromagnet?
An electromagnet is a magnet that is created when an electric current is passed through a coil of wire.
What is the difference between a permanent magnet and an electromagnet?
A permanent magnet is always magnetized, while an electromagnet is magnetized only when a current flows through it.
What is the principle of an electric motor?
The principle of an electric motor is that a current-carrying conductor placed in a magnetic field experiences a force, which causes it to rotate.
What is the principle of a generator?
The principle of a generator is that a magnet moving through a coil of wire induces an electric current in the wire.
What is the Faraday’s law of electromagnetic induction?
Faraday’s law of electromagnetic induction states that a changing magnetic field induces an electric field, which in turn induces an electric current in a conductor.
What is Lenz’s law?
Lenz’s law states that the direction of an induced current is such that it opposes the change that produced it.
What is eddy current?
Eddy currents are electric currents that are induced in conductors when they are exposed to a changing magnetic field.
What is the transformer?
A transformer is a device that is used to change the voltage of an alternating current (AC) without changing its frequency.
What is the formula for the transformer?
The formula for the transformer is V1/V2 = N1/N2, where V1 and V2 are the voltages of the primary and secondary coils, and N1 and N2 are the numbers of turns in the primary and secondary coils.
What is hysteresis?
Hysteresis is the phenomenon where the magnetic properties of a material lag behind changes in the magnetic field.
What is magnetic domain?
A magnetic domain is a region in a magnetic material in which the magnetic moments of the atoms are aligned in the same direction.
What is a solenoid?
A solenoid is a coil of wire that is used to create a magnetic field when an electric current is passed through it.
What is the magnetic moment?
The magnetic moment is a measure of the strength and direction of a magnet.
What is the relation between magnetic moment and magnetic field?
The magnetic moment of a magnet is directly proportional to the strength of the magnetic field it produces.
What is the Curie temperature?
The Curie temperature is the temperature at which a ferromagnetic material loses its magnetic properties.
What is a magnetic material?
A magnetic material is a material that can be magnetized and will produce a magnetic field.
What are the types of magnetic materials?
The types of magnetic materials are ferromagnetic, paramagnetic, and diamagnetic.
What is the difference between ferromagnetic, paramagnetic, and diamagnetic materials?
Ferromagnetic materials are strongly magnetized, paramagnetic materials are weakly magnetized, and diamagnetic materials are not magnetized.
What is the Earth’s magnetic field?
The Earth’s magnetic field is the magnetic field that surrounds the Earth.
What causes the Earth’s magnetic field?
The Earth’s magnetic field is caused by the movement of molten iron in the Earth’s core.
What is the geomagnetic field?
The geomagnetic field is the magnetic field that surrounds the Earth and extends into space.
What is the Van Allen radiation belt?
The Van Allen radiation belt is a region in space where charged particles are trapped by the Earth’s magnetic field.
What is a magnetic compass?
A magnetic compass is a device that uses a magnet to show the direction of magnetic north.
What is a magnetic anomaly?
A magnetic anomaly is a deviation in the Earth’s magnetic field from its normal value.
What is the magnetic declination?
The magnetic declination is the angle between magnetic north and true north.
What is the magnetic inclination?
The magnetic inclination is the angle between the Earth’s magnetic field and the horizontal plane.
What is a magnetic storm?
A magnetic storm is a disturbance in the Earth’s magnetic field caused by solar activity.
What is a solar flare?
A solar flare is a sudden burst of energy on the Sun’s surface.
What is a coronal mass ejection?
A coronal mass ejection is a massive burst of plasma and magnetic field from the Sun’s corona.
What is magnetohydrodynamics?
Magnetohydrodynamics is the study of the interaction between magnetic fields and electrically conductive fluids.
What is the magnetic reconnection?
Magnetic reconnection is a process in which magnetic field lines break and reconnect, releasing a large amount of energy.
What is the solar wind?
The solar wind is a stream of charged particles that flows from the Sun’s corona into space.
What is the magnetosphere?
The magnetosphere is the region around the Earth where the Earth’s magnetic field dominates over the solar wind.
What is the aurora borealis?
The aurora borealis, also known as the Northern Lights, is a natural light display in the sky caused by charged particles from the Sun interacting with the Earth’s magnetic field.
What is the aurora australis?
The aurora australis, also known as the Southern Lights, is a natural light display in the sky caused by charged particles from the Sun interacting with the Earth’s magnetic field in the southern hemisphere.
What is a magnetic levitation train?
A magnetic levitation train, also known as a maglev train, is a train that uses magnetic levitation to float above the track and eliminate friction.
What is a magnetic storage device?
A magnetic storage device is a device that uses magnetic fields to store and retrieve data, such as hard drives and magnetic tape.
What is a solenoid?
A solenoid is a coil of wire that produces a magnetic field when an electric current is passed through it.
What is an electromagnet?
An electromagnet is a magnet that is created by passing an electric current through a coil of wire.
What is a magnetic field line?
A magnetic field line is a line that represents the direction and strength of the magnetic field at every point in space.
What is a magnetic dipole?
A magnetic dipole is a pair of equal and opposite magnetic poles separated by a small distance.
What is the right-hand rule for magnetic fields?
The right-hand rule for magnetic fields is a rule that determines the direction of the magnetic field around a current-carrying wire.
What is magnetic hysteresis?
Magnetic hysteresis is the lagging of magnetic field intensity behind the magnetizing force in a magnetic material. It is the property of a ferromagnetic material to retain a certain amount of magnetism even after the removal of the magnetizing field.