Circuits Basics
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- 1.
What is the unit for voltage?
- A.
Volts
- B.
Amperes
- C.
Ohms
- D.
Joules
Correct Answer
A. Volts -
- 2.
What is the unit for current?
- A.
Volts
- B.
Amperes
- C.
Ohms
- D.
Joules
Correct Answer
B. Amperes -
- 3.
What is the unit for resistance?
- A.
Volts
- B.
Amperes
- C.
Ohms
- D.
Joules
Correct Answer
C. Ohms -
- 4.
What is the unit for energy?
- A.
Volts
- B.
Amperes
- C.
Ohms
- D.
Joules
Correct Answer
D. Joules -
- 5.
Which of these is the equation for Ohm's Law?
- A.
W = Fd
- B.
V = IR
- C.
R = IV
- D.
PE = mgh
Correct Answer
B. V = IR -
- 6.
What is shown in this picture?
- A.
Resistors connected in parallel
- B.
Batteries connected in parallel
- C.
Resistors connected in series
- D.
Batteries connected in series
Correct Answer
C. Resistors connected in series -
- 7.
Why can birds sit on a power line?
- A.
Because birds have minimal resistance compared to household electronics, so current is diverted to the houses instead
- B.
Because the wire is in the air and air has infinite resistance so no current flows through the wire
- C.
Because birds' feet are insulated so current is not conducted through them
- D.
Because both feet are on the same voltage line, so there is no potential difference, so current does not flow through the bird
Correct Answer
D. Because both feet are on the same voltage line, so there is no potential difference, so current does not flow through the bird -
- 8.
What if a bird sat on a power line that was very close to the ground, placing one foot on the wire and one foot on the ground?
- A.
No current would flow through the bird, so nothing would happen
- B.
The bird would experience a voltage difference between the wire and the ground and would get fried
- C.
The bird's feet are insulated, so it doesn't matter what it touches
Correct Answer
B. The bird would experience a voltage difference between the wire and the ground and would get fried -
- 9.
A certain steam iron carries a current of 6.4 A when connected to a 120 V source. What is the resistance of the steam iron?
- A.
1.875 Ω
- B.
0.05 Ω
- C.
768 Ω
- D.
18.75 Ω
Correct Answer
D. 18.75 Ω -
- 10.
Voltage is a measurement of what?
- A.
Radiant energy of a lightbulb in a circuit
- B.
Kinectic energy of a motor in a circuit
- C.
Potential energy stored in a battery
- D.
The flow of electrons
Correct Answer
C. Potential energy stored in a battery -
- 11.
What is current?
- A.
The flow of charges, usually in the form of electrons
- B.
The newness of a battery or resistor
- C.
Something that blocks or slows the flow of electrons
- D.
The potential energy stored in a battery
Correct Answer
A. The flow of charges, usually in the form of electrons -
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Current Version
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Oct 31, 2014Quiz Edited by
ProProfs Editorial Team -
Oct 30, 2014Quiz Created by
Ebusis
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