Circuits Review Quiz

A circuit is connected in series with a 20 volt source. There are three resistors placed in the circuit. The resistances are 8 ohms, 10 ohms, and 4 ohms. What is the total power of the circuit?

• 0.91 W

• 18.18 W

• 440 W

• 8800 W

A student makes the following claim about electron flow through a circuit that includes a battery and a bulb:

“The current through the circuit is called direct current because the electrons move from the negative side of the battery, through the circuit, to the positive side of the battery."

• The student is incorrect and is actually describing Alternating Current

• The student is incorrect because the electrons go from positive to negative

• The student is incorrect because electrons don't flow through the wire

• The student is correct

A battery is wired to a single lightbulb in series. How can the current in the wire be described?

• The current goes into the lightbulb and uses all the current

• The current goes through the lightbulb and uses some of the current

• The current goes through the circuit and none is removed

Two resistors are wired in parallel and have an equivalent resistance of 8 ohms. Which of the following could be the resistance of R1?

• 8 ohm

• 7 ohms

• 5 ohms

• 10 ohms

A voltmeter should be wired in ________

A voltmeter should be wired in ________ and a ammeter should be wired in _______

• series, parallel

• parallel, series

• series, series

• parallel, parallel

Equivalent resistance of a circuit means ___________

• resistance of a single resistor

• all resistors have an equal resistance

• total resistance of the circuit

Which appliance costs the most?

TV I=4A V=120V t=4.0 hrs

Vacuum I=6A V=120V t=0.10 hrs

Heater I=10A V=120V t=0.75 hrs

Gaming Console I=8A V=120V t=2.5 hrs

• TV

• Vacuum

• Heater

• Gaming Console

A series circuit with two lightbulbs is attached to a 10 volt battery. Which of the following circuit elements should the student use to ensure the bulbs do not blow when too much current goes through the circuit?

• fuse

• switch

• resistor

What is the total current in the circuit?

• 2.08A

• 0.96A

• 11.53A

• 9.8A