2 ways to increase the magnetic force of an electro-magnet

Increase the number of coils and the current flow

Increase the current flow, reduce the number of coils

Increase the voltage, decrease the number of coils

Spread out the coils, replace iron core with rubber.

How can magnets cause objects to have kinetic energy?

A magnetic force can convert potential energy stored in a magnetic field to kinetic energy.

A magnetic force can convert kinetic energy stored in a magnetic field to potential energy.

Kinetic energy can convert potential energy stored in a gravitational field.

A magnetic energy can convert potential energy stored in a gravitational field to kinetic energy.

Are the magnetic field lines in the picture correct?

Yes, because they point from north to south.

No, because they point from north to south (they're supposed to go the other way).

Yes, because the North pole is on the left in all pictures.

No, because the North pole is on the left in all pictures (it's supposed to be on the right).

In this image, matching north poles from two magnets are introduced. What do you predict will be the outcome?

The two north poles will repel each other

There will be no interaction. The poles of magnets do not have an effect on one another.

The two north poles will attract each other

The two magnets will combine and become one magnet

A split ring commutator in a DC motor does what?

A split ring commutator changes the direction of current every half turn

A split ring commutator changes the direction of voltage every half turn

A split ring commutator changes the force of power charge every half turn

A split ring commutator changes the curent of the voltage of the power every half turn

A student carries out an experiment to see the effect of a magnetic field on a wire carrying a current. The wire moves upwards as shown. What should the student do to make the wire move downwards?

change the direction of the current

move the poles of the magnet closer together

send a smaller current through the wire

The diagram shows a simple DC electric motor which is rotating. Which change will make the motor rotate more quickly?

reversing the polarity of the magnets

A current-carrying coil in a magnetic field experiences a turning effect. How can the turning effect be increased?

increase the number of turns on the coil

reverse the direction of the magnetic field

You know this substance is magnetized because

all the domains have right angles

The relative strength of magnetic field is show by

Degree of closeness of field lines

Magnets and Electric

Authored by Charles Martinez

Other Sciences

KG - University

AI Actions

Add similar questions

Adjust reading levels

Convert to real-world scenario

Translate activity

More...

Content View

Student View

35 questions

Show all answers

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Produces an electric current when a coil of wire wrapped around an iron core is rotated near a magnet.

generator

electric motor

electromagnet

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Used at power stations to produce electrical energy for our homes.

generator

electric motor

electromagnet

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Contains coils of wire that are stationary and rotating magnets that are moved by turbines.

generator

electric motor

electromagnet

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Huge wheels that rotate when pushed by water, wind or steam.

turbines

leads

magnets

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Transforms mechanical energy to electrical energy.

generator

electric motor

electromagnet

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Changes electrical energy into mechanical energy

generator

electric motor

electromagnet

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Contains an electromagnet that rotates between the poles of a magnet.

generator

electric motor

electromagnet

Access all questions and much more by creating a free account

Create resources

Host any resource

Get auto-graded reports

Continue with Google

Continue with Email

Continue with Classlink

Continue with Clever

or continue with

Microsoft

Apple

Others

Already have an account?

Similar Resources on Wayground

33 questions

Aliens

Quiz

•

9th Grade - University

35 questions

Seasons, Tides, Eclipses and Moon Phases

Quiz

•

8th Grade

31 questions

Cell Organelles

Quiz

•

KG - University

30 questions

Volcanoes, Earthquakes, and Plate Tectonics Review

Quiz

•

6th - 8th Grade

40 questions

Unit 3 Test Review

Quiz

•

9th - 11th Grade

38 questions

4th Grade Science Quiz

Quiz

•

4th - 5th Grade

39 questions

Rock & Fossil Record TEST

Quiz

•

8th - 10th Grade

30 questions

Water Cycle, Weather, Climate review

Quiz

•

6th Grade

Popular Resources on Wayground

7 questions

History of Valentine's Day

Interactive video

•

4th Grade

15 questions

Fractions on a Number Line

Quiz

•

3rd Grade

20 questions

Equivalent Fractions

Quiz

•

3rd Grade

25 questions

Multiplication Facts

Quiz

•

5th Grade

$fractions$

22 questions

fractions

Quiz

•

3rd Grade

15 questions

Valentine's Day Trivia

Quiz

•

3rd Grade

20 questions

Main Idea and Details

Quiz

•

5th Grade

20 questions

Context Clues

Quiz

•

6th Grade

Discover more resources for Other Sciences

12 questions

Presidents' Day

Quiz

•

KG - 5th Grade

11 questions

FOREST Growth Mindset

Lesson

•

10 questions

THEME

Quiz

•

KG - University

7 questions

Copy of G5_U5_L14_22-23

Lesson

•

KG - Professional Dev...

10 questions

Add & Subtract Mixed Numbers with Like Denominators

Quiz

•

KG - University

10 questions

Long i- igh, ie, and y Quiz

Quiz

•

KG - 3rd Grade

10 questions

2D & 3D Shapes

Quiz

•

20 questions

Capitalization in sentences

Quiz

•

KG - 4th Grade

Magnets and Electric

Produces an electric current when a coil of wire wrapped around an iron core is rotated near a magnet.

Used at power stations to produce electrical energy for our homes.

Contains coils of wire that are stationary and rotating magnets that are moved by turbines.

Huge wheels that rotate when pushed by water, wind or steam.

Transforms mechanical energy to electrical energy.

Changes electrical energy into mechanical energy

Contains an electromagnet that rotates between the poles of a magnet.

The coil of the electromagnet must be connected to a __________ or another source of electricity.

What is this device?

The battery in this machine is our ____________ of electrical energy.

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Other Sciences