Electricity review

Front

What is the formula to calculate resistance in a circuit?

Back

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

Front

What is the unit of resistance?

Back

Ohm (Ω)

Front

What is the unit of voltage?

Back

Volt (V)

Front

What is the unit of power?

Back

Watt (W)

Front

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

Back

Ohm's Law

Front

If a circuit has a voltage of 120 V and a current of 4 A, what is the resistance?

Back

30 ohms

Front

What happens to the current if the resistance in a circuit increases while the voltage remains constant?

Back

The current decreases.

Front

What is the effect of rubbing a balloon on your hair?

Back

The balloon becomes negatively charged, and your hair becomes positively charged.

Front

What is potential difference?

Back

It is the difference in electric potential energy per unit charge between two points in a circuit, also known as voltage.

Front

What does a multimeter measure?

Back

It measures voltage, current, and resistance.