Back to the lesson and practice
PrintablePractice worksheet
Do it🖨️ On paper✏️ On screen
Layout1 column2 columns
Answer keyNoneAnswersWith steps
Questions10162430
LevelEasierMixedHarder
Print sizeNormalLarge print
New copyMake a new one

Free to print and copy for home or class. This link always prints the same sheet.

eurekami

9th grade electricity and magnetism

9th grade (Year 10 in England) · 16 questions · Common Core: NGSS.HS-PS3-1, NGSS.HS-PS3-3 · England: KS4 Combined Science: Electricity, GCSE Combined Science: Electricity, GCSE Combined Science: Electricity (domestic uses and safety)

Name

Date

Score/ 16

  1. Question 1

    How long does it take for 60 C to flow when the current is 4 A, in s?

    Answers

  2. Question 2

    A current of 3 A flows for 30 s. How much charge flows, in coulombs (C)?

    AnswerC

  3. Question 3

    Why is it dangerous to touch the live wire even if the appliance is switched off at the switch?

    • A. It is not dangerous
    • B. The live wire is always cold
    • C. The switch makes the voltage higher
    • D. The live wire is still at a high voltage, so current could flow through you to earth

  4. Question 4

    A current of 1 A flows for 30 s. How much charge flows, in coulombs?

    AnswerC

  5. Question 5

    240 C of charge flows through a lamp in 2 minutes. What is the current, in A?

    AnswerA

  6. Question 6

    An appliance on a 12 V car battery draws a current of 5 A. What is its power, in W?

    AnswerW

  7. Question 7

    In a UK three-pin plug, which wire is this: blue insulation?

    • A. live wire
    • B. neutral wire
    • C. earth wire

  8. Question 8

    A 10 W device is used for 10 s. How much energy does it transfer, in J?

    AnswerJ

  9. Question 9

    Mains electricity: which statement is NOT true?

    • A. Double-insulated appliances do not need an earth wire.
    • B. The fuse is connected in the live wire.
    • C. The earth wire only carries current when there is a fault.
    • D. A battery supplies alternating current.

  10. Question 10

    How long does it take for 225 C to flow when the current is 5 A, in s?

    Answers

  11. Question 11

    A current of 4 A flows for 10 s. How much charge flows, in coulombs (C)?

    AnswerC

  12. Question 12

    What is the difference between ac and dc?

    • A. there is no difference
    • B. ac comes from batteries
    • C. dc is used in mains sockets
    • D. ac keeps reversing direction; dc flows in one direction only

  13. Question 13

    A current of 3 A flows for 60 s. How much charge flows, in coulombs?

    AnswerC

  14. Question 14

    900 C of charge flows through a lamp in 5 minutes. What is the current, in A?

    AnswerA

  15. Question 15

    An appliance on UK mains (230 V) draws a current of 10 A. What is its power, in W?

    AnswerW

  16. Question 16

    In a UK three-pin plug, which wire is this: stops a metal case becoming live?

    • A. live wire
    • B. neutral wire
    • C. earth wire

All done? Color in the animal! · Free from eurekami.com/math

for the adult only

Answer key: 9th grade electricity and magnetism

  1. 1. 15 s

  2. 2. 90 C

  3. 3. D. The live wire is still at a high voltage, so current could flow through you to earth

  4. 4. 30 C

  5. 5. 2 A

  6. 6. 60 W

  7. 7. B. neutral wire

  8. 8. 100 J

  9. 9. D. A battery supplies alternating current.

  10. 10. 45 s

  11. 11. 40 C

  12. 12. D. ac keeps reversing direction; dc flows in one direction only

  13. 13. 180 C

  14. 14. 3 A

  15. 15. 2300 W

  16. 16. C. earth wire