Ohm's Law Basics - Flashcard

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 x R.

Front

What does V represent in the formula V = I x R?

Back

V represents Voltage.

Front

What does I represent in the formula V = I x R?

Back

I represents Current.

Front

What does R represent in the formula V = I x R?

Back

R represents Resistance.

Front

What is the unit of Voltage?

Back

The unit of Voltage is Volts (V).

Front

What is the unit of Current?

Back

The unit of Current is Amps (A).

Front

What is the unit of Resistance?

Back

The unit of Resistance is Ohms (Ω).

Front

If the resistance in a circuit is doubled, what happens to the current?

Back

The current halves.

Front

If the voltage in a circuit is increased while resistance remains constant, what happens to the current?

Back

The current increases.

Front

Calculate the current in a circuit with a 12V battery and a 4Ω resistor.

Back

The current is 3 Amps (I = V/R = 12V/4Ω).