Physical Science Midterm Review

Sort the definition and examples for motor and generator.

Groups:

(a) Motors

,

(b) Generators

• Converts electricity to mechanical energy (motion)

• Escalator

• An electrical current causes a coil of wire to rotate in a magnetic field.

• Windmill

• A magnet is rotated through a coil of wire to produce an electric current.

• Hydroelectric

• Fan

• converts mechanical energy (motion) into electricity

How can the power of the electromagnet increase?

Groups:

(a) power of the electromagnet increases

,

(b) does not affect power of electromagnet

• add voltage

• add magnets

• add resistors

• add current

• add coils

• add loads

Tags

NGSS.MS-PS2-3

Which conclusion is BEST supported by the data table?

• The shorter the wire, the stronger the magnetic force.

• The lower the battery voltage, the stronger the magnetic force.

• The higher the number of coils, the stronger the magnetic force.

• The longer the wire, the weaker the magnetic force.

Tags

NGSS.MS-PS2-3

A balloon has a negative charge. A wall has a positive charge. What will happen when the balloon is brought near the wall?

• The balloon will be attracted to the wall.

• The balloon will repel from the wall

• The balloon will not do anything

• The balloon will spin

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Match the following scenarios with their outcomes.

• North pole of one magnet and north pole of another magnet

• No reaction

• North pole of one magnet and south pole of another magnet

• Repel

• Two non-magnetic objects

• Attract

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-4

NGSS.MS-PS2-5

These objects would...

• Attract

• Repel

• No reaction

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

What is the primary function of an electromagnet?

• To create light using electrical energy

• To generate a magnetic field when electric current flows through it. It can be turned on and off.

• To store electrical energy for later use

• To convert magnetic energy into electrical energy

Tags

NGSS.MS-PS2-3

What kind of circuit is this?

• Series
• Consecutive
• Parallel
• Training

This is an example of a _______ circuit

• open
• series
• parallel
• square

The diagram shows a simple electrical circuit.

Which of the following would always increase the flow of current through the lights in the circuit shown? Select all that apply.

• Decreasing the battery voltage

• Increasing the battery voltage

• Increasing the resistance of the lights.

• Decreasing the resistance of the lights.