Ohm's Law

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) of the conductor. It is usually expressed as V = I × R.

Front

What is the formula to calculate resistance?

Back

Resistance (R) can be calculated using the formula R = V / I, where V is voltage and I is current.

Front

What unit is current measured in?

Back

Current is measured in Amperes (A), commonly referred to as Amps.

Front

What unit is voltage measured in?

Back

Voltage is measured in Volts (V).

Front

What unit is resistance measured in?

Back

Resistance is measured in Ohms (Ω).

Front

What is a circuit?

Back

A circuit is a closed path through which electricity flows.

Front

If the voltage is 12 Volts and the current is 3 Amps, what is the resistance?

Back

Using Ohm's Law, R = V / I = 12V / 3A = 4Ω.

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 happens to voltage if current increases while resistance remains constant?

Back

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

Front

What is the relationship between voltage, current, and resistance in a circuit?

Back

The relationship is defined by Ohm's Law: V = I × R.