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 Voltage?

Back

Voltage, or 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). It depends on the material, length, and cross-sectional area of the conductor.

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). Formula: V = I × R.

Front

How do you calculate current using Ohm's Law?

Back

To calculate current (I), use the formula: I = V / R, where V is voltage and R is resistance.

Front

What is the unit of electric current?

Back

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

Front

What factors affect resistance in a conductor?

Back

Resistance is affected by the material, length, cross-sectional area, and temperature of the conductor.

Front

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

Back

The relationship is defined by Ohm's Law: V = I × R, meaning voltage equals current times resistance.

Front

What happens to current if resistance increases while voltage remains constant?

Back

If resistance increases while voltage remains constant, the current will decrease.

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 a load.