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Current and voltage rules in series and parallel circuits

8th grade (Year 9 in England) · 16 questions · Common Core: NGSS.MS-PS2-3, NGSS.HS-PS3-5 · England: KS3 Physics: Electricity and electromagnetism, GCSE Combined Science: Electricity (series and parallel)

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  1. Question 1

    Two lamps are in parallel. The current through one branch is 1.5 A and through the other is 0.4 A. What current flows from the battery, in A?

    AnswerA

  2. Question 2

    Two lamps are connected in series to a 4.5 V battery. The voltage across the first lamp is 1.5 V. What is the voltage across the second lamp, in V?

    AnswerV

  3. Question 3

    An ammeter reads 0.4 A before the first lamp in a series circuit. What will it read after the last lamp?

    • A. 0.4 A
    • B. more than 0.4 A
    • C. 0 A
    • D. less than 0.4 A

  4. Question 4

    Two lamps are in parallel. The current through one branch is 1 A and through the other is 2 A. What current flows from the battery, in A?

    AnswerA

  5. Question 5

    Two lamps are connected in series to a 4.5 V battery. The voltage across the first lamp is 1.5 V. What is the voltage across the second lamp, in V?

    AnswerV

  6. Question 6

    In a series circuit with three lamps, one lamp breaks. What happens to the other two?

    • A. only one goes out
    • B. they go out
    • C. they get brighter
    • D. they stay the same

  7. Question 7

    A 1.9 A current leaves a battery and splits into two parallel branches. One branch carries 1.5 A. What current flows in the other branch, in A?

    AnswerA

  8. Question 8

    Two lamps are connected in series to a 3 V battery. The voltage across the first lamp is 0.75 V. What is the voltage across the second lamp, in V?

    AnswerV

  9. Question 9

    In a parallel circuit with three lamps, one lamp breaks. What happens to the other two?

    • A. they stay lit
    • B. they get dimmer
    • C. they flicker and stop
    • D. they all go out

  10. Question 10

    A 2.2 A current leaves a battery and splits into two parallel branches. One branch carries 0.2 A. What current flows in the other branch, in A?

    AnswerA

  11. Question 11

    Two lamps are connected in series to a 6 V battery. The voltage across the first lamp is 1.5 V. What is the voltage across the second lamp, in V?

    AnswerV

  12. Question 12

    In a series circuit with three lamps, one lamp breaks. What happens to the other two?

    • A. they stay the same
    • B. only one goes out
    • C. they get brighter
    • D. they go out

  13. Question 13

    A 0.6 A current leaves a battery and splits into two parallel branches. One branch carries 0.2 A. What current flows in the other branch, in A?

    AnswerA

  14. Question 14

    Two lamps are connected in series to a 4.5 V battery. The voltage across the first lamp is 1.13 V. What is the voltage across the second lamp, in V?

    AnswerV

  15. Question 15

    In a parallel circuit with three lamps, one lamp breaks. What happens to the other two?

    • A. they all go out
    • B. they get dimmer
    • C. they stay lit
    • D. they flicker and stop

  16. Question 16

    A 0.6 A current leaves a battery and splits into two parallel branches. One branch carries 0.2 A. What current flows in the other branch, in A?

    AnswerA

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  1. 1.9 A
  2. 3 V
  3. 0.4 A
  4. 3 A
  5. 3 V
  6. they go out
  7. 0.4 A
  8. 2.25 V
  9. they stay lit
  10. 2 A
  11. 4.5 V
  12. they go out
  13. 0.4 A
  14. 3.37 V
  15. they stay lit
  16. 0.4 A