Electromagnetic Force Investigation 4 Review

The statements below describe how a motor works.

Select True if the sentence is true; select False if the sentence is false.

Electric current travels into the motor through long wires that connect directly to a set of electromagnets.

• True

• False

Tags

NGSS.MS-PS2-3

The statements below describe how a motor works.

Select True if the sentence is true; select False if the sentence is false.

The commutator is a switch that turns a set of three electromagnets on and off.

• True

• False

The statements below describe how a motor works.

Select True if the sentence is true; select False if the sentence is false.

Only two of three electromagnets are turned on at one time.

• True

• False

The statements below describe how a motor works.

Select True if the sentence is true; select False if the sentence is false.

The electromagnets that are turned on attract or repel the permanent magnets that are in the casing.

• True

• False

Tags

NGSS.MS-PS2-5

The statements below describe how a motor works.

Select True if the sentence is true; select False if the sentence is false.

When the electromagnets rotate, the commutator is in a new position and one section will turn off while another turns on, continuing the motion to keep the shaft turning.

• True

• False

The picture shows two lightbulbs powered by a solar cell.

Describe the energy transfers that make the bulbs light, starting with energy from the Sun.

Answer explanation

The Sun shines on the solar cell. The solar cell transfers light energy into electrical energy. The the solar cell transfer the electrical energy to the lightbulbs, which transfers electrical energy into light energy and heats up.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Includes electromagnets

• Just the motor

• Just the Generator

• Both the motor and generator

Tags

NGSS.MS-PS2-3

Transfers energy from electrical energy to kinetic energy

• Just the motor

• Just the generator

• Both the motor and generator

Tags

NGSS.MS-PS3-5

Includes a commutator

• Just the motor

• Just the generator

• Both the Motor and the generator

Tags

NGSS.MS-ETS1-1

Includes a shaft

• Just the motor

• Just the generator

• Both the motor and the generator