Electric Current

Front

What is Electric Current?

Back

Electric current is the flow of electric charge, typically measured in amperes (A). It is caused by 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 is Voltage?

Back

Voltage, also known as electric potential difference, is the measure of the energy per unit charge available to drive the flow of current in a circuit, measured in volts (V).

Front

What is Resistance?

Back

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

Front

What is Ohm's Law?

Back

Ohm's Law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R). It can be expressed as V = I × R.

Front

What happens to current if voltage increases while resistance stays the same?

Back

If voltage increases while resistance stays the same, the current will increase.

Front

What happens to current if resistance increases while voltage stays the same?

Back

If resistance increases while voltage stays the same, the current will decrease.

Front

What is a Conductor?

Back

A conductor is a material that allows electrons to flow easily, facilitating the movement of electric current.

Front

What is an Insulator?

Back

An insulator is a material that resists the flow of electric current, preventing the movement of electrons.

Front

Calculate the current in a circuit with a 12V battery and a 4Ω resistor.

Back

Current (I) = Voltage (V) / Resistance (R) = 12V / 4Ω = 3A.