PS Unit 7 L4.1 - Explaining Electric Current

Front

What is the unit of measure for electric current?

Back

Ampere

Front

If a circuit has a current of 4 amperes and the current is halved, how does this affect the number of charges passing a point per second?

Back

The number of charges is halved.

Front

Why is it often impossible to track the motion of individual electric charges in a device?

Back

Because there are too many charges moving.

Front

Why is it important to measure the rate of electric charge movement in a circuit?

Back

To ensure the circuit is safe and functioning correctly.

Front

What might happen if a device requires a current of 2 amperes to operate, but the current drops to 1 ampere?

Back

The device may not function properly.

Front

What is electric current?

Back

The flow of electric charge in a circuit.

Front

What is the relationship between current (I), charge (Q), and time (t)?

Back

I = Q/t, where I is current in amperes, Q is charge in coulombs, and t is time in seconds.

Front

What is the role of a conductor in an electric circuit?

Back

To allow electric charges to flow easily.

Front

What is resistance in an electrical context?

Back

The opposition to the flow of electric current, measured in ohms.

Front

How does increasing resistance in a circuit affect the current?

Back

Increasing resistance decreases the current, according to Ohm's Law.