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 happens to current if voltage remains constant and resistance increases?

Back

The current decreases.

Front

What is the formula to calculate voltage using current and resistance?

Back

Voltage (V) = Current (I) × Resistance (R) or V = I × R.

Front

Define resistance in the context of electricity.

Back

Resistance is a measure of how difficult it is for electrons to flow through a material. It is measured in Ohms (Ω).

Front

What is the unit of measurement for current?

Back

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

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 resistance?

Back

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

Front

If a 12 Volt battery is used and a current of 3 Amps is desired, what size resistor is needed?

Back

4 Ohms.

Front

What is required for the flow of electricity?

Back

A complete path.

Front

What does increasing resistance do to current if voltage is constant?

Back

It decreases the current.