Final Exam Review Practice #1

Front

What is Direct Current (DC)?

Back

Direct Current (DC) is the unidirectional flow of electric charge, typically produced by batteries, where the electric charge flows in a constant direction.

Front

What is Alternating Current (AC)?

Back

Alternating Current (AC) is the flow of electric charge that periodically reverses direction, commonly used in household power supply.

Front

What happens to other light bulbs in a parallel circuit when one burns out?

Back

The other light bulbs burn the same as before, as each bulb operates independently in a parallel circuit.

Front

Where do most electrons in a battery circuit come from?

Back

Most electrons flowing through a battery circuit come from the wires in the circuit.

Front

What is a conductor?

Back

A conductor is a material that allows the flow of electric current, such as metals like copper and aluminum.

Front

What is an insulator?

Back

An insulator is a material that resists the flow of electric current, such as rubber or glass.

Front

What is a semiconductor?

Back

A semiconductor is a material that has conductivity between that of an insulator and a conductor, commonly used in electronic devices.

Front

How do you calculate average speed?

Back

Average speed is calculated by dividing the total distance traveled by the total time taken (Average Speed = Total Distance / Total Time).

Front

If a trip covers 180 km in 3 hours, what is the average speed?

Back

The average speed is 60 km/h.

Front

What is the role of a battery in a circuit?

Back

A battery provides the electrical energy needed to drive the current through the circuit.