Electric Current Flashcard

Front

What is electric current?

Back

Electric current is the flow of electric charge, typically measured in amperes (A). It represents the movement of electrons through a conductor.

Front

What is the unit of electric current?

Back

The unit of electric current is the ampere (A).

Front

What does voltage represent in an electric circuit?

Back

Voltage is the measure of electric potential difference between two points in a circuit, often described as what 'pushes' electrons.

Front

What is a circuit?

Back

A circuit is a closed loop that allows electric current to flow, consisting of a power source, conductors, and electrical devices.

Front

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

Back

A resistor limits the flow of electric current in a circuit, helping to control the voltage and current levels.

Front

What is the relationship between voltage, current, and resistance?

Back

This relationship is described by Ohm's Law: V = I × R, where V is voltage, I is current, and R is resistance.

Front

What is a conductor?

Back

A conductor is a material that allows electric current to flow easily, such as copper or 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 static electricity?

Back

Static electricity is the buildup of electric charge on the surface of objects, which can discharge suddenly.

Front

What is the difference between AC and DC current?

Back

AC (Alternating Current) changes direction periodically, while DC (Direct Current) flows in one direction only.