Electric Currents & Circuits

Front

A closed loop through which electrical charges can move

Back

circuit

Front

Current that only flows in one direction

Back

direct current

Front

What is the resistance of an electric frying pan which draws 5.8 amps when connected to a 120 V circuit?

Back

21 ohms

Front

What is the correct circuit symbol for a load?

Back

(Insert appropriate circuit symbol for a load)

Front

What do photocells do?

Back

converts light energy to electrical energy

Front

The unit of electric current is called?

Back

ampere (A)

Front

What is Ohm's Law?

Back

V = I × R (Voltage = Current × Resistance)

Front

What is the difference between alternating current (AC) and direct current (DC)?

Back

AC changes direction periodically, while DC flows in one direction.

Front

What is a resistor?

Back

A component that resists the flow of electric current.

Front

What is the purpose of a fuse in a circuit?

Back

To protect the circuit by breaking the connection if the current is too high.