Series and parallel circuits
8th grade (Year 9 in England) · 16 questions · Common Core: NGSS.HS-PS3-1 · England: KS3 Physics: Electricity and electromagnetism (current electricity), KS4 Combined Science: Electricity
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Question 1
Why are lights in a house wired in parallel?
- A. It uses less wire
- B. If one breaks, they all go off
- C. Each can be switched on and off separately and gets the full voltage
- D. So the current is the same everywhere
Question 2
Series and parallel: which statement is NOT true?
- A. In series, total resistance is the sum of the resistances.
- B. In a parallel circuit, the voltage across each branch is the same.
- C. Voltmeters are connected in parallel.
- D. Adding resistors in parallel increases the total resistance.
Question 3
Two lamps are in series with a 12 V battery. The voltage across one lamp is 10 V. What is the voltage across the other lamp, in V?
AnswerV
Question 4
How is an ammeter connected to measure the current through a lamp?
- A. across the battery only
- B. it is not connected
- C. in parallel with the lamp
- D. in series with the lamp
Question 5
Series and parallel: which statement is NOT true?
- A. In a series circuit, if one bulb breaks, the others go out.
- B. Voltmeters are connected in parallel.
- C. Adding resistors in parallel increases the total resistance.
- D. In series, total resistance is the sum of the resistances.
Question 6
Two resistors of 17 Ω and 13 Ω are connected in series. What is their total resistance, in Ω?
AnswerΩ
Question 7
In a series circuit, the current is…
- A. used up by each component
- B. zero at the battery
- C. the same at every point
- D. biggest after the bulb
Question 8
Series and parallel: which statement is NOT true?
- A. Voltmeters are connected in parallel.
- B. Adding resistors in parallel increases the total resistance.
- C. In a series circuit, if one bulb breaks, the others go out.
- D. In a parallel circuit, the voltage across each branch is the same.
Question 9
Two resistors of 7 Ω and 5 Ω are connected in series. What is their total resistance, in Ω?
AnswerΩ
Question 10
Why are lights in a house wired in parallel?
- A. If one breaks, they all go off
- B. Each can be switched on and off separately and gets the full voltage
- C. It uses less wire
- D. So the current is the same everywhere
Question 11
Series and parallel: which statement is NOT true?
- A. In a series circuit, if one bulb breaks, the others go out.
- B. In series, total resistance is the sum of the resistances.
- C. Adding resistors in parallel increases the total resistance.
- D. Voltmeters are connected in parallel.
Question 12
A parallel circuit has two branches. The current in one branch is 1.5 A and in the other is 0.5 A. What is the current from the battery, in A?
AnswerA
Question 13
Adding more bulbs in parallel to a battery (each in its own branch) makes each bulb…
- A. stay about as bright as before
- B. explode
- C. go out
- D. get much dimmer
Question 14
Series and parallel: which statement is NOT true?
- A. In a parallel circuit, the voltage across each branch is the same.
- B. In series, total resistance is the sum of the resistances.
- C. Voltmeters are connected in parallel.
- D. Ammeters are connected in parallel.
Question 15
Two resistors of 17 Ω and 14 Ω are connected in series. What is their total resistance, in Ω?
AnswerΩ
Question 16
How is an ammeter connected to measure the current through a lamp?
- A. in series with the lamp
- B. across the battery only
- C. in parallel with the lamp
- D. it is not connected
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