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 can be expressed as V = I × R.

Front

What does 'current' mean in electrical terms?

Back

Current refers to the flow of electric charge, measured in Amperes (A). It indicates how fast the electrons are flowing through a circuit.

Front

What is the unit of measurement for resistance?

Back

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

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 Amperes (A).

Front

How do you calculate current using voltage and resistance?

Back

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

Front

If a circuit has a voltage of 12 volts and a resistance of 3 ohms, what is the current?

Back

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

Front

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

Back

The relationship is defined by Ohm's Law: V = I × R. This means that if you increase the voltage, the current will increase if resistance remains constant.

Front

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

Back

If resistance increases while voltage remains constant, the current will decrease according to Ohm's Law.

Front

What is a resistor?

Back

A resistor is an electrical component that limits or regulates the flow of electrical current in a circuit.