Magnetic Effects of Electric Current

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Questions and Answers

What happens to a compass needle when an electric current passes through a nearby wire?

The compass needle deflects.

What does the deflection of a compass needle near a current-carrying wire demonstrate?

It demonstrates that electricity and magnetism are linked.

What are the two effects mentioned in the text that are caused by an electric current?

Heating and magnetic effects.

What is the reverse possibility mentioned in the text regarding electricity and magnetism?

The possibility of an electric effect of moving magnets. Signup and view all the answers

What is an electromagnet?

Electromagnets involve the magnetic effect of electric current. Signup and view all the answers

Who discovered the relationship between electricity and magnetism?

Hans Christian Oersted. Signup and view all the answers

What crucial role did Hans Christian Oersted play in science?

Understanding electromagnetism. Signup and view all the answers

In what year did Oersted make his discovery?

1820 Signup and view all the answers

Name one technology that resulted from Oersted's research?

Radio, television, or fiber optics. Signup and view all the answers

What unit is named in honor of Oersted?

The oersted. Signup and view all the answers

What observation led Oersted to conclude that electricity and magnetism were related phenomena?

He observed that a compass needle deflected when an electric current passed through a nearby wire. Signup and view all the answers

In Activity 12.1, what is the purpose of placing the copper wire perpendicular to the plane of the paper?

To ensure the magnetic field produced by the current-carrying wire interacts optimally with the compass needle, allowing for easier observation of deflection. Signup and view all the answers

Besides heating, what other effect of electric current is explored in the beginning of Chapter 12?

The magnetic effect. Signup and view all the answers

What is the significance of the unit 'oersted'?

It is a unit of magnetic field strength. Signup and view all the answers

Based on the text, can a moving magnet produce electricity? Answer yes or no and provide reasoning.

Yes. The text mentions 'the reverse possibility of an electric effect of moving magnets'. Signup and view all the answers

In Activity 12.1, what happens when the key is inserted into the plug and why?

The compass needle deflects because the current flowing through the copper wire creates a magnetic field. Signup and view all the answers

What is the relationship between electricity and magnetism as stated in Chapter 12?

Electricity and magnetism are linked to each other. Signup and view all the answers

How did Oersted make his discovery about electromagnetism?

He made the discovery accidentally while experimenting with electric currents. Signup and view all the answers

What is the practical implication of Oersted's discovery regarding electricity and magnetism?

It led to the development of technologies such as radio, television, and fiber optics. Signup and view all the answers

After observing the deflection in Activity 12.1, what conclusion can be drawn about the space surrounding the wire?

The space surrounding the wire has a magnetic field. Signup and view all the answers

Flashcards

Magnetic Effect of Electric Current

Electric current passing through a wire produces a magnetic field.

Compass Needle Deflection

When electric current flows, the compass needle shows a change in direction.