Flashcards on Magnetic Effects of Electric Current

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What is the magnetic effect of an electric current?

The creation of a magnetic field by an electric current

Name the device that uses the magnetic effect of electric current to convert electrical energy into mechanical energy.

Electric motor

State the right-hand rule for determining the direction of magnetic field produced around a current-carrying conductor.

Curl the fingers of the right hand in the direction of current flow, and the thumb will point in the direction of the magnetic field.

What is the SI unit of magnetic field strength?

Tesla (T)

Explain the working principle of an electric generator.

An electric generator converts mechanical energy into electrical energy using the principle of electromagnetic induction.

What is the purpose of a galvanometer?

To detect and measure small electric currents

What are the two types of magnetic poles?

North and South

State Fleming's left-hand rule.

It is used to determine the direction of force experienced by a current-carrying conductor placed in a magnetic field.

Name the phenomenon observed when a current-carrying conductor experiences a force in a magnetic field.

Magnetic force

What happens to the strength of the magnetic field around a current-carrying conductor when the current is increased?

The strength of the magnetic field increases

What is an electromagnet?

A temporary magnet produced by passing an electric current through a coil of wire wrapped around an iron core

State the Flemings's right-hand rule for finding the direction of the induced current.

Extend the thumb, forefinger, and middle finger of the right hand such that they are perpendicular to each other. If the forefinger points in the direction of the magnetic field and the thumb points in the direction of motion, then the middle finger points in the direction of the induced current.

Name the device that uses the magnetic effect of electric current to measure electric current.

Ammeter

Explain the working principle of an electromagnetic crane.

An electromagnetic crane uses the magnetic effect of current to lift heavy loads. When current passes through a coil, it creates a strong magnetic field that attracts ferromagnetic materials.

What is the difference between an AC (Alternating Current) and a DC (Direct Current)?

AC periodically changes its direction while DC flows in one direction only.

What is the magnetic effect of an electric current?

The creation of a magnetic field by an electric current

Name the device that uses the magnetic effect of electric current to convert electrical energy into mechanical energy.

Electric motor

State the right-hand rule for determining the direction of magnetic field produced around a current-carrying conductor.

Curl the fingers of the right hand in the direction of current flow, and the thumb will point in the direction of the magnetic field.

What is the SI unit of magnetic field strength?

Tesla (T)

Explain the working principle of an electric generator.

An electric generator converts mechanical energy into electrical energy using the principle of electromagnetic induction.

What is the purpose of a galvanometer?

To detect and measure small electric currents

What are the two types of magnetic poles?

North and South

State Fleming's left-hand rule.

It is used to determine the direction of force experienced by a current-carrying conductor placed in a magnetic field.

Name the phenomenon observed when a current-carrying conductor experiences a force in a magnetic field.

Magnetic force

What happens to the strength of the magnetic field around a current-carrying conductor when the current is increased?

The strength of the magnetic field increases

What is an electromagnet?

A temporary magnet produced by passing an electric current through a coil of wire wrapped around an iron core

State the Flemings's right-hand rule for finding the direction of the induced current.

Extend the thumb, forefinger, and middle finger of the right hand such that they are perpendicular to each other. If the forefinger points in the direction of the magnetic field and the thumb points in the direction of motion, then the middle finger points in the direction of the induced current.

Name the device that uses the magnetic effect of electric current to measure electric current.

Ammeter

Explain the working principle of an electromagnetic crane.

An electromagnetic crane uses the magnetic effect of current to lift heavy loads. When current passes through a coil, it creates a strong magnetic field that attracts ferromagnetic materials.

What is the difference between an AC (Alternating Current) and a DC (Direct Current)?

AC periodically changes its direction while DC flows in one direction only.

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