Electromagnetism

Question 1

The diagram shows a setup for inducing a current in a wire.

Revolt · Accepted Answer

moving the wire downward through the magnetic field

Question 2

Juan makes an adjustment to an electromagnet that causes the electromagnet to lose some of its strength. What did Juan most likely do?

Revolt · Accepted Answer

He reduced the number of loops in the wire.

Question 3

How does adding an iron bar to a solenoid affect the magnetic field of the electromagnet?

Revolt · Accepted Answer

It increases the magnetic field’s strength.

Question 4

If the current in each wire is the same, which wire produces the strongest magnetic field?

Revolt · Accepted Answer

a 1-mm-thick coiled wire with ten loops

Question 5

Assuming a current is flowing, what increases the strength of the magnetic field of a coiled electrical wire?

Revolt · Accepted Answer

adding more coils to the wire

Question 6

What is a solenoid?

Revolt · Accepted Answer

a current-carrying wire with many coils

Question 7

Linus builds an electrical circuit with a battery and with wires that carry the current. As the battery weakens, the current also weakens.

Revolt · Accepted Answer

The field gets weaker.

Question 8

A compass needle normally points toward Earth’s magnetic pole, which is near the North Pole. Which best explains why the needle moves away from the pole when it comes close to a current-carrying wire?

Revolt · Accepted Answer

Magnetism surrounding the wire draws the needle toward the wire.

Question 9

A current is induced in a wire by moving the wire through a magnetic field. Which is one factor that affects the direction of the current?

Revolt · Accepted Answer

the direction in which the wire moves

Question 10

Which wire, when current flows through it, would be surrounded by the strongest magnetic field?

Revolt · Accepted Answer

A copper colored coil with 5 turns.

Electromagnetism Answers

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