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T6 L3 Electromagnetic Force

Authored by Jennifer Julius

Physics

8th Grade

Used 1+ times

T6 L3 Electromagnetic Force
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28 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is a magnetic field created by a current-carrying wire?

Due to the temperature of the wire

As a result of the wire's length

Due to the movement of electric charges within the wire

Because of the color of the wire

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does an electromagnet differ from a permanent magnet?

An electromagnet is made of copper while a permanent magnet is made of iron.

An electromagnet is only used in small electronic devices while a permanent magnet is used in large machinery.

An electromagnet has a weaker magnetic force than a permanent magnet.

An electromagnet can be turned on and off by controlling the flow of electricity.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does the strength of a magnetic field change with the distance from the current-carrying wire?

Remains constant

Decreases

Increases

Becomes zero

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the applications of electromagnetic force in everyday life?

Benefits in space exploration

Some applications include electric motors, generators, transformers, MRI machines, and everyday electronics like smartphones and computers.

Applications in agriculture

Uses in marine biology

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does the direction of the current affect the direction of the magnetic field in a current-carrying wire?

The direction of the current does not affect the direction of the magnetic field

The direction of the magnetic field is always perpendicular to the direction of the current

The direction of the magnetic field is always parallel to the direction of the current

The direction of the magnetic field is opposite to the direction of the current

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to the magnetic field when the current in the wire is reversed?

The magnetic field also reverses direction

The magnetic field becomes stronger

The magnetic field becomes weaker

The magnetic field disappears

7.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

The magnetic field lines are__________.

curves

closed loops

lines

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