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 current in a circuit?

Back

The formula to calculate current (I) in a circuit is I = V / R, where V is the voltage and R is the resistance.

Front

What is the unit of measurement for voltage?

Back

The unit of measurement for voltage is Volts (V).

Front

What is the unit of measurement for current?

Back

The unit of measurement for current is Amps (A).

Front

What is the unit of measurement for resistance?

Back

The unit of measurement for resistance is Ohms (Ω).

Front

If a circuit has a voltage of 12 volts and a resistance of 4 ohms, what is the current?

Back

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

Front

How does increasing resistance affect current in a circuit?

Back

Increasing resistance in a circuit decreases the current, assuming the voltage remains constant.

Front

How does increasing voltage affect current in a circuit?

Back

Increasing voltage in a circuit increases the current, assuming the resistance remains constant.

Front

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

Back

The relationship is defined by Ohm's Law: V = I × R, meaning voltage is the product of current and resistance.

Front

What is a practical application of Ohm's Law?

Back

Ohm's Law is used in electrical engineering to design circuits, calculate the required resistance for desired current, and troubleshoot electrical issues.