Electric Circuits Quiz

Match each unit of measurement to its physical quantity on the left.

• joule

• ampere

• watt

• volt

• coulomb

Match each description to the items below.

• parallel

• resistors

• current

• series

• ammeter

The conservation of charge in a circuit implies that _____.

• electrons cannot be created or destroyed

• the total amount of charge is constant

• electrons can move through the circuit

• all of the above

A conventional current is the flow of _____.

• electrons

• alternating current

• positive charge

• electrons or ions

The potential difference between two points in space is 1000 V, and 2 coulombs of charge is transferred from the point of lower potential to the point of higher potential. The amount of work done is ______.

• 500 J

• 2000 J

• 2×10^-3 J

• 1000 J

A 9-V battery is connected to a toy car, and the current produced is 2 A. The rate at which energy is delivered to the toy car is ______.

• 4.5 W

• 4.5 J

• 18 J

• 18 W

A 60-W lightbulb runs for 2 hours. The energy transformed is ______.

• 120,000 J

• 432,000 J

• 120 J

• 30 J

A heater that operates at 220 W is connected to a 110-V outlet. The current through the heater is ______.

• 2.2 A

• 2 A

• 0.5 A

• 20 A

A lamp is connected to a battery of 50 V, and the current through the circuit is 2 A. The resistance of the lamp is ______.

• 100 Ω

• 150 Ω

• 0.04 Ω

• 25 Ω

The current through a resistor of 15 Ω is 5.0 A. The potential difference across the resistor is ______.

• 45 V

• 0.33 V

• 75 V

• 3.0 V