Resistance is measured in a unit called the ____.

• ampere

• coulomb

• ohm

• volt

Electric charge that has accumulated on an object is referred to as ____.

• circuit electricity

• current circuit

• current electricity

• static electricity

The region around a magnet where the magnetic forces act is the ____.

• electromagnetic pole

• magnetic domain

• magnetic field

• magnetic pole

Tags

NGSS.MS-PS2-5

There is a repulsive force between two charged objects when

• their charges are of unlike sign.

• they have the same number of protons.

• their charges are of like sign.

• they have the same number of electrons.

Tags

NGSS.MS-PS2-3

The electric force between charged objects is

• attractive only

• repulsive only

• either attractive or repulsive

• neither attractive nor repulsive

Tags

NGSS.MS-PS2-3

Current is the rate at which charges move through a(n)

• conductor.

• insulator.

• voltage.

• joule.

A 13 Ω resistor has 0.050 A of current in it. What is the potential difference across the resistor?

• 6.5 V

• 0.65 V

• 0.065 V

• 0.0065 V

8. Magnetically soft substances

• a. retain their magnetism longer than others.

• b. lose their magnetism more easily than others.

• c. cannot be magnetized easily.

• d. pick up more iron nails than magnetically hard substances.

The strength of a magnetic field created by current in a wire can be increased by

• using shorter wire.

• decreasing the current in the wire.

• using longer wire.

• wrapping the wire into a coil.

Tags

NGSS.MS-PS2-3

Generators convert

• mechanical energy to electrical energy

• electrical energy to mechanical energy

• chemical energy to electrical energy

• electrical energy to chemical energy

Tags

NGSS.HS-PS3-3