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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
Two resistors of 14 Ω and 11 Ω are connected in series. What is their total resistance, in Ω?
AnswerΩ
2
Question 2
Series and parallel: which statement is NOT true?
- A. In series, total resistance is the sum of the resistances.
- B. In a series circuit, current is used up by each bulb.
- 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.
3
Question 3
How is an ammeter connected to measure the current through a lamp?
- A. across the battery only
- B. in parallel with the lamp
- C. in series with the lamp
- D. it is not connected
Question 4
A parallel circuit has two branches. The current in one branch is 1.5 A and in the other is 0.7 A. What is the current from the battery, in A?
AnswerA
5
Question 5
Series and parallel: which statement is NOT true?
- A. Adding resistors in parallel increases the total resistance.
- B. Voltmeters are connected in parallel.
- 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.
6
Question 6
Why are lights in a house wired in parallel?
- A. Each can be switched on and off separately and gets the full voltage
- B. If one breaks, they all go off
- C. So the current is the same everywhere
- D. It uses less wire
Question 7
Two resistors of 20 Ω and 15 Ω are connected in series. What is their total resistance, in Ω?
AnswerΩ
8
Question 8
Series and parallel: which statement is NOT true?
- A. In a series circuit, if one bulb breaks, the others go out.
- B. In a parallel circuit, the voltage across each branch is the same.
- C. In series, total resistance is the sum of the resistances.
- D. Ammeters are connected in parallel.
9
Question 9
In a series circuit, the current is…
- A. biggest after the bulb
- B. the same at every point
- C. zero at the battery
- D. used up by each component
Question 10
Two lamps are in series with a 24 V battery. The voltage across one lamp is 23 V. What is the voltage across the other lamp, in V?
AnswerV
11
Question 11
Series and parallel: which statement is NOT true?
- A. In a series circuit, if one bulb breaks, the others go out.
- B. Ammeters are connected in parallel.
- C. In series, total resistance is the sum of the resistances.
- D. In a parallel circuit, the voltage across each branch is the same.
12
Question 12
In a series circuit, the current is…
- A. used up by each component
- B. the same at every point
- C. biggest after the bulb
- D. zero at the battery
Question 13
A parallel circuit has two branches. The current in one branch is 0.3 A and in the other is 0.5 A. What is the current from the battery, in A?
AnswerA
14
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 a series circuit, current is used up by each bulb.
- C. In series, total resistance is the sum of the resistances.
- D. In a series circuit, if one bulb breaks, the others go out.
15
Question 15
In a series circuit, the current is…
- A. the same at every point
- B. biggest after the bulb
- C. used up by each component
- D. zero at the battery
Question 16
Two resistors of 6 Ω and 19 Ω are connected in series. What is their total resistance, in Ω?
AnswerΩ

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