What is the relationship between electrical current and magnetic field strength in an electromagnet?

When current is increased, magnetic field strength increases

When current is increased the strength of magnetic field decreases

How are electromagnets different from magnets?

you can turn an electromagnet on/off

magnets have a North and South pole

The picture below shows a turbine generator used to produce electricity at a geothermal power plant. Electricity is produced by using steam to _____________.

reduce friction in the turbine generators

reduce emissions from the turbine generators

What is the job of the generator in a coal power plant?

To change mechanical energy into electrical energy

Use electrical energy to turn a turbine.

Convert electrical energy into mechanical energy

Turn the turbine which changes water into steam

What does a motor do?

Uses Electricity to cause motion (usually, rotational motion)

What should the blanks be? When a wire carrying an electric current is placed in a ________________, it may experience a force. The field from the fixed magnet ___________ with the field due to the current. This can cause the wire to be attracted or repelled from the fixed magnet you will see the effect of the attraction/repulsion in the ___________of the wire.

magnetic field, interacts, movement

electric field, interacts, movement

magnetic field, interacts, vibration

12.4 The closer together a magnet's magnetic field lines are,

the stronger the magnetic field.

the closer they are to the magnet's center.

the closer they are to disappearing.

Motors and Generators

Quiz

•

Physics

•

8th - 12th Grade

•

Practice Problem

•

Medium

•

NGSS

HS-PS2-5, HS-PS3-5, HS-PS3-3

+3

Standards-aligned

Brittany Murphy

Used 302+ times

FREE Resource

32 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

The strength of an electromagnet can be affected by

changing the current in the wire

adding more coils

increasing the mass of the iron core

All of the above

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

2.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Bob made an electromagnet but it was very weak. How can he make it stronger?

take away a d-cell

wrap the wire loosely

use thicker wire

use less winds

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

3.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

A _______________ is a current-carrying coil of wire with many loops

electromagnet

solenoid

magnet

compass

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

4.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

Add more coils of wire to the nail.

Use a smaller battery.

Reverse the poles of the magnet.

Remove all the coils and the nail.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

5.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

In order for an electromagnet to be formed, an current must pass through a coil of wrapped around an core.

wire, iron, electric

electric, wire, iron

iron, electric, wire

excited, hair, apple

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

6.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

How do electromagnets differ from regular magnets?

A. They can be turned off and on

B. Their polarity can be reversed

C. Their strength can be changed

D. All of the above

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

7.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

The flow of electrical energy starts at the ___ side of the d-cell.

negative

positve

complete circuit

bulb

Tags

NGSS.MS-PS2-3

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Motors and Generators

32 questions

The strength of an electromagnet can be affected by

Bob made an electromagnet but it was very weak. How can he make it stronger?

A _______________ is a current-carrying coil of wire with many loops

This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

In order for an electromagnet to be formed, an __________ current must pass through a coil of __________ wrapped around an ________ core.

How do electromagnets differ from regular magnets?

The flow of electrical energy starts at the ___ side of the d-cell.

What is the relationship between electrical current and magnetic field strength in an electromagnet?

How are electromagnets different from magnets?

Surrounding every magnet is a __________ __________.

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In order for an electromagnet to be formed, an current must pass through a coil of wrapped around an core.

Surrounding every magnet is a .