Power and Energy Quiz

In a circuit with a resistance of 10 ohms and a current of 2 amperes, what is the power consumed?

• 20 watts

• 10 watts

• 5 watts

• 40 watts

If the voltage across a resistor is doubled while the resistance remains constant, what happens to the power consumed by the resistor?

• It remains the same

• It doubles

• It quadruples

• It halves

What is the unit of electrical power?

• Joule

• Volt

• Ampere

• Watt

In a series circuit, if one resistor is removed, what happens to the total resistance?

• It decreases

• It increases

• It remains the same

• It becomes zero

If a circuit has a total power of 100 watts and a voltage of 50 volts, what is the current flowing through the circuit?

• 2 amperes

• 0.5 amperes

• 5 amperes

• 10 amperes

In a parallel circuit, if one branch is short-circuited, what happens to the total current in the circuit?

• It decreases

• It increases

• It remains the same

• It becomes zero

If a device operates at 120 volts and consumes 300 watts of power, what is the current drawn by the device?

• 2.5 amperes

• 3.0 amperes

• 4.0 amperes

• 5.0 amperes