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8th grade electricity and magnetism

8th grade (Year 9 in England) · 16 questions · Common Core: NGSS.HS-PS3-1, NGSS.MS-PS2-3, NGSS.HS-PS3-5 · England: KS3 Physics: Electricity and electromagnetism (current electricity), KS4 Combined Science: Electricity, KS3 Physics: Electricity and electromagnetism

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  1. Question 1

    A 30 V supply is connected across a 10 Ω resistor. What current flows, in A?

    AnswerA

  2. Question 2

    A 6 V battery drives a current of 2 A through a lamp. What is the resistance of the lamp, in Ω?

    AnswerΩ

  3. Question 3

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

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

  4. Question 4

    Two resistors of 4 Ω and 8 Ω are connected in series. What is their total resistance, in Ω?

    AnswerΩ

  5. Question 5

    Two lamps are in parallel. The current through one branch is 0.3 A and through the other is 1.2 A. What current flows from the battery, in A?

    AnswerA

  6. Question 6

    A current of 2 A flows through a 5 Ω resistor. What is the potential difference (voltage) across it, in V?

    AnswerV

  7. Question 7

    How is an ammeter connected to measure the current through a lamp?

    • A. it is not connected
    • B. in parallel with the lamp
    • C. in series with the lamp
    • D. across the battery only

  8. Question 8

    Two lamps are connected in series to a 6 V battery. The voltage across the first lamp is 3 V. What is the voltage across the second lamp, in V?

    AnswerV

  9. Question 9

    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. Voltmeters are connected in parallel.
    • D. In a series circuit, if one bulb breaks, the others go out.

  10. Question 10

    A 2 V supply is connected across a 4 Ω resistor. What current flows, in A?

    AnswerA

  11. Question 11

    A 6 V battery drives a current of 2 A through a lamp. What is the resistance of the lamp, in Ω?

    AnswerΩ

  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. they get brighter
    • C. only one goes out
    • D. they go out

  13. Question 13

    A parallel circuit has two branches. The current in one branch is 0.2 A and in the other is 0.5 A. What is the current from the battery, in A?

    AnswerA

  14. Question 14

    Two lamps are in parallel. The current through one branch is 0.2 A and through the other is 0.6 A. What current flows from the battery, in A?

    AnswerA

  15. Question 15

    A current of 4 A flows through a 6 Ω resistor. What is the potential difference (voltage) across it, in V?

    AnswerV

  16. Question 16

    How is an ammeter connected to measure the current through a lamp?

    • A. it is not connected
    • B. across the battery only
    • C. in series with the lamp
    • D. in parallel with the lamp

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  1. 3 A
  2. 3 Ω
  3. they go out
  4. 12 Ω
  5. 1.5 A
  6. 10 V
  7. in series with the lamp
  8. 3 V
  9. In a series circuit, current is used up by each bulb.
  10. 0.5 A
  11. 3 Ω
  12. they go out
  13. 0.7 A
  14. 0.8 A
  15. 24 V
  16. in series with the lamp