Electricity: Ohm's law

Front

What is the unit of electric current?

Back

Amps (A)

Front

What does Ohm's Law state?

Back

Voltage (V) = Current (I) x Resistance (R)

Front

How is resistance measured?

Back

In Ohms (Ω)

Front

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

Back

Ohm's Law describes the relationship: V = I x R.

Front

If the resistance is constant, what happens to current when voltage increases?

Back

The current increases.

Front

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

Back

V = I x R

Front

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

Back

I = V / R

Front

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

Back

R = V / I

Front

What does a resistor do in a circuit?

Back

A resistor limits the flow of electric current.

Front

What is the symbol for resistance in electrical equations?

Back

R