Electromagnetic Induction Quiz

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Questions and Answers

What was the revolutionary invention that led to the discovery of electric lights, trains, telephones, and personal computers?

The discovery of electric fields

The discovery of electromagnetic induction (correct)

The discovery of electric current

The discovery of magnetic fields

Who conducted experiments that led to the discovery of electromagnetic induction?

Benjamin Franklin and George Washington

Albert Einstein and Max Planck

Thomas Edison and Nikola Tesla

Michael Faraday and Joseph Henry (correct)

What is Faraday's Law of Induction?

The magnitude of the induced emf in a closed loop is equal to the magnetic flux through the loop.

The magnitude of the induced emf in a closed loop is equal to the resistance of the loop.

The magnitude of the induced emf in a closed loop is equal to the electric current through the loop.

The magnitude of the induced emf in a closed loop is equal to the time rate of change of magnetic flux through the loop. (correct)

What is Lenz's Law?

The induced current opposes the change in flux, work has to be done against the opposition offered by the induced current in changing the flux. Signup and view all the answers

What is self-inductance?

The property of a coil by which an induced emf is developed in itself due to a change in the strength of the current flowing through the coil itself. Signup and view all the answers

What are eddy currents?

Currents that flow through a conductor in response to a changing magnetic field. Signup and view all the answers

What is mutual induction?

The phenomenon by which an induced emf is produced in one coil due to a change in the strength of the current flowing through another coil. Signup and view all the answers

What is an AC generator and how does it work?

It converts mechanical energy into electrical energy, and it consists of a coil mounted on a rotor shaft, which is mechanically rotated in the uniform magnetic field by some external means. Signup and view all the answers

What was the result of Faraday and Henry's experiments on electromagnetic induction?

The discovery of electric lights, trains, telephones, and personal computers Signup and view all the answers

What does Faraday's Law of Induction state?

The magnitude of the induced emf in a closed loop is equal to the time rate of change of magnetic flux through the loop Signup and view all the answers

What is Lenz's Law?

The induced current opposes the change in flux Signup and view all the answers

What is self-inductance?

The property of a coil by which an induced emf is developed in itself due to a change in the strength of the current flowing through the coil itself Signup and view all the answers

What are eddy currents?

Undesirable currents that heat up the core and dissipate electrical energy in the form of heat Signup and view all the answers

What is mutual induction?

The phenomenon by which an induced emf is produced in one coil due to a change in the strength of the current flowing through another coil Signup and view all the answers

What is the energy stored in an inductor?

In the form of a magnetic field, and it is given by W=1/2Li^2 Signup and view all the answers

What is an AC generator?

A device that converts mechanical energy into electrical energy, consisting of a coil mounted on a rotor shaft, which is mechanically rotated in the uniform magnetic field by some external means Signup and view all the answers

What did the discovery of electromagnetic induction lead to?

Discovery of electric lights, trains, telephones, and personal computers Signup and view all the answers

Who conducted experiments that led to the discovery of electromagnetic induction?

Michael Faraday and Joseph Henry Signup and view all the answers

What is Faraday's Law of Induction?

The magnitude of the induced emf in a closed loop is equal to the time rate of change of magnetic flux through the loop Signup and view all the answers

What is Lenz's Law?

The induced current opposes the change in flux, work has to be done against the opposition offered by the induced current in changing the flux Signup and view all the answers

What are eddy currents?

Currents that flow in a circular path Signup and view all the answers

What is self-inductance?

The property of a coil by which an induced emf is developed in itself due to a change in the strength of the current flowing through the coil itself Signup and view all the answers

What is the energy stored in an inductor?

The energy stored in an inductor is in the form of a magnetic field Signup and view all the answers

What does an AC generator convert?

Mechanical energy into electrical energy Signup and view all the answers

Study Notes

Experiments of Electromagnetic Induction and Their Applications

Electromagnetic induction was a revolutionary invention that led to the discovery of electric lights, trains, telephones, and personal computers.
Michael Faraday and Joseph Henry conducted experiments that led to the discovery of electromagnetic induction.
The coil C1 connected to a galvanometer G experiment showed that the presence of electric current in the coil is indicated by the deflection of the pointer in the galvanometer when the North-pole of a bar magnet is pushed towards the coil.
The deflection in the galvanometer is found to be larger when the magnet is pushed towards or pulled away from the coil faster.
Faraday's Law of Induction states that the magnitude of the induced emf in a closed loop is equal to the time rate of change of magnetic flux through the loop.
Lenz's Law is in accordance with the law of conservation of energy, as the induced current opposes the change in flux, work has to be done against the opposition offered by the induced current in changing the flux.
An electric field is induced in any region of space in which a magnetic field is changing with time, and the induced electric field and magnetic field are at right angles to each other.
Eddy currents are undesirable since they heat up the core and dissipate electrical energy in the form of heat. However, they are used to advantage in certain applications.
Self-inductance is the property of a coil by which an induced emf is developed in itself due to a change in the strength of the current flowing through the coil itself.
The energy stored in an inductor is in the form of a magnetic field, and it is given by W=1/2Li^2.
Mutual induction is the phenomenon by which an induced emf is produced in one coil due to a change in the strength of the current flowing through another coil.
An AC generator converts mechanical energy into electrical energy, and it consists of a coil mounted on a rotor shaft, which is mechanically rotated in the uniform magnetic field by some external means.

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Description

Test your knowledge on the experiments of electromagnetic induction and their applications with this informative quiz. From the discovery of electric lights to the invention of personal computers, electromagnetic induction has played a significant role in shaping the world we live in today. This quiz covers the key concepts, including Faraday's Law of Induction, Lenz's Law, self-inductance, mutual induction, and AC generators. Challenge yourself and see how much you know about this fascinating subject!