Free Printable Electricity, Motors, & Generators summative assessment

Worksheets

Electricity, Motors, & Generators summative assessment

Total questions: 15

Worksheet time: 10mins

Name

Class

Date

What will happen when a balloon is rubbed against a wool sweater?

The negatively charged balloon attracts the positively charged sweater.

The negatively charged balloon repels the positively charged sweater.

Both the balloon and the wool sweater will become negatively charged.

Both the balloon and the wool sweater will become positively charged.

Choose all the answers that are correct to increase the brightness of a lightbulb in a SERIES circuit. (pick 2 answers!)

Increase the battery size from 9V to 12V

Decrease the number of lightbulbs (less resistance)

Decrease the battery size from 12V to 9V

Increase the number of lightbulbs (more resistance)

Which pairs of bar magnets attract each other? (pick 2 answers!).

South to South

North to North

South to North

North to South

The two magnets were placed near each other on a table. Which statement is FALSE (NOT TRUE)?

The south and north poles of two magnets will be attracted to each other.

The two north poles of the magnets will repel each other.

There will be a magnetic field between the magnets.

The magnetic forces will electrically charge the magnets.

The picture shows an iron nail with a coil of wire around it. What will happen to the nail when electric current flows through the wire?

The iron nail will quickly melt.

The iron nail will spin.

The nail and wires will become a magnet.

Nothing will happen to the nail.

The wire coil around the iron nail in the device pictured here is an _______________.

Parallel Circuit

Electromagnet

Motor

Permanent Magnet

Which bar material would make the strongest electromagnet?

Wood Bar

Glass Bar

Iron Bar

Which amount of wire coils would make the strongest electromagnet?

7 wire coils (top)

5 wire coils (middle)

3 wire coils (bottom)

Which number of batteries would make the strongest electromagnet?

Two 9-Volt batteries

Three 9-Volt batteries

Four 9-Volt batteries

10.

What happens to an electromagnet when the electric current suddenly turns off?

The magnetic field gets stronger

The magnetic field reverses direction

The magnetic field stays the same

The magnetic field disappears

11.

A generator...

turns radiant energy to electrical energy

turns mechanical energy into chemical energy

transforms mechanical energy into electrical energy.

transforms electrical energy into mechanical energy.

12.

What is electromagnetic induction?

process of generating an electric current by changing the magnetic field around it (used in generators)

The conversion of electrical energy into thermal energy through resistance.

A motor rotates in only one direction producing alternating electricity.

The attraction between two permanent magnets of opposite poles.

13.

What is the energy flow diagram used to describe the process in a nuclear power plant? (enlarge the picture and use MRCENT!)

Chemical -> mechanical -> thermal -> electrical

Radiant -> thermal -> nuclear -> electrical

Nuclear -> radiant -> mechanical -> thermal

Nuclear -> thermal -> mechanical -> electrical

14.

Magnetic Fields are created by (a) electric currents

Choose from the below words

moving

non-moving

15.

Increasing the number of loops in a solenoid will cause the strength of its magnetic field to (a)

Choose from the below words

increase.

decrease.

100 %

Electricity, Motors, & Generators summative assessment

Total questions: 15

Worksheet time: 10mins

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