PS Unit 7 L4.1 - Explaining Electric Current

Front

What is Electric Current?

Back

Electric Current is the continuous flow of electric charges from one region to another.

Front

What device measures electric current?

Back

An ammeter is used to measure the rate at which electric charges move through a wire.

Front

What happens to electric current when a circuit is open?

Back

When a circuit is open or broken, the electric current is 0 amperes.

Front

What is the unit of electric current?

Back

The unit of electric current is amperes (A).

Front

What is the relationship between current and the number of charges passing a point?

Back

If the current is halved, the number of charges passing a point per second is also halved.

Front

What is Voltage?

Back

Voltage is the difference in electric potential energy per charge between two points in a circuit.

Front

What is Resistance?

Back

Resistance is the opposition to the flow of electric current, measured in ohms (Ω).

Front

What is the role of a circuit in electric current?

Back

A circuit provides a closed path for electric current to flow.

Front

What is Capacitance?

Back

Capacitance is the ability of a system to store electric charge, measured in farads (F).

Front

How does an ammeter connect in a circuit?

Back

An ammeter must be connected in series with the circuit to measure the current.