Electricity and Ohm's Law Review

What is voltage?

• Force that causes electric charges to flow

• The net movement or flow of charges in a single direction through a wire

• the tendency for a material to oppose the flow of electrons

What is current?

• the tendency for a material to oppose the flow of electrons

• Force that causes electric charges to flow

• The net movement or flow of charges in a single direction through a wire

Tags

NGSS.HS-PS2-5

What is resistance?

• Force that causes electric charges to flow

• the tendency for a material to oppose the flow of electrons

• The net movement or flow of charges in a single direction through a wire

If you want to increase the brightness of a bulb, you must

• increase the resistance to 3 ohms

• increase the voltage to 3 volts

• decrease the current to 1 amp

• decrease the voltage to 1.5 volts

True or False: A circuit will continue to operate and push electricity through it even if there is a break in the circuit.

• True

• False

A kettle operates from a 120V outlet. It has a heating element with a resistance of 8.0Ω. Calculate the current.

• 15 amps

• 960 amps

• 15 ohms

• 960 ohms

If you increase the resistance in the circuit, what will happen to the current?

• increase

• decrease

If you keep the resistance constant and increase the voltage , what will happen to the current?

• increase

• decrease

• stay constant

Which of the following is an example of an insulator?

• a dime

• a metal wire

• a glass door

• a metal cup

Which of the following is an example of a conductor?

• a piece of wood

• a penny

• plastic container

• glass bowl

Tags

NGSS.MS-PS2-3