Circuits Basics
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- 1.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
- 2.What is the unit for current?
- A.
Volts
- B.
Amperes
- C.
Ohms
- D.
Joules
- 3.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
- 4.What is the unit for voltage?
- A.
Volts
- B.
Amperes
- C.
Ohms
- D.
Joules
- 5.What is the unit for resistance?
- A.
Volts
- B.
Amperes
- C.
Ohms
- D.
Joules
- 6.What is the unit for energy?
- A.
Volts
- B.
Amperes
- C.
Ohms
- D.
Joules
- 7.Which of these is the equation for Ohm's Law?
- A.
W = Fd
- B.
V = IR
- C.
R = IV
- D.
PE = mgh
- 8.
![What is shown in this picture?]( "What is shown in this picture?")
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
- 9.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
- 10.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
- 11.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
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