Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 978 · 40 questions

Remember (Push, flow, resist): Voltage → volts (V), current → amperes (A), resistance → ohms (Ω), power → watts (W). milli (m) = ÷ 1000 and kilo (k) = × 1000: 250 mA = 0.25 A, 2.2 kΩ = 2200 Ω. Voltmeter across a part; ammeter in series.

1. 1.📏 Which unit measures energy used each second? (a) watt (W) (b) volt (V) (c) ohm (Ω) (d) ampere (A)
2. 2.📏 In the water-pipe picture of a circuit, current is like … (a) the flow of water (b) the water pressure (c) a narrow pipe (d) the pipe colour
3. 3.📏 Which unit measures the flow of charge? (a) ohm (Ω) (b) ampere (A) (c) volt (V) (d) watt (W)
4. 4.True or false: the ammeter measures current. (a) False (b) True
5. 5.📏 How many kilowatts (kW) is 1600 W? =
6. 6.📏 Which unit measures power? (a) ampere (A) (b) ohm (Ω) (c) watt (W) (d) volt (V)
7. 7.True or false: the voltmeter is joined across a part. (a) True (b) False
8. 8.Which of these is measured in volts (V)? (a) energy used each second (b) current (c) voltage (d) resistance
9. 9.📏 Which unit measures current? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
10. 10.📏 How many amperes (A) is 410 mA? =
11. 11.Which of these is measured in amperes (A)? (a) energy used each second (b) current (c) how much a part resists (d) resistance
12. 12.True or false: the ammeter is joined across a part. (a) False (b) True
13. 13.📏 How many watts (W) is 1.1 kW?
14. 14.📏 How many ohms (Ω) is 7 kΩ?
15. 15.📏 How many kilo-ohms (kΩ) is 5900 Ω? =
16. 16.True or false: energy used each second is measured in ohms (Ω). (a) True (b) False
17. 17.True or false: the ammeter measures voltage. (a) True (b) False
18. 18.Which of these is measured in watts (W)? (a) the push of a cell (b) voltage (c) power (d) the flow of charge
19. 19.Which of these is measured in volts (V)? (a) the flow of charge (b) the push of a cell (c) resistance (d) how much a part resists
20. 20.True or false: current is measured in amperes (A). (a) False (b) True
21. 21.📏 How many kilo-ohms (kΩ) is 2700 Ω? =
22. 22.📏 How many milliamperes (mA) is 2.69 A?
23. 23.📏 How many amperes (A) is 1480 mA? =
24. 24.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
25. 25.📏 How many watts (W) is 2.9 kW?
26. 26.📏 Which unit measures the push of a cell? (a) ampere (A) (b) volt (V) (c) ohm (Ω) (d) watt (W)
27. 27.📏 How many amperes (A) is 2070 mA? =
28. 28.📏 How many ohms (Ω) is 0.5 kΩ?
29. 29.True or false: energy used each second is measured in watts (W). (a) False (b) True
30. 30.True or false: the voltmeter measures current. (a) False (b) True
31. 31.📏 How many watts (W) is 4.2 kW?
32. 32.📏 Which unit measures how much a part resists? (a) volt (V) (b) watt (W) (c) ampere (A) (d) ohm (Ω)
33. 33.📏 How many milliamperes (mA) make 1 ampere? (a) 100 (b) 60 (c) 10 (d) 1000
34. 34.📏 How many kilowatts (kW) is 2800 W? =
35. 35.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
36. 36.📏 Which unit measures voltage? (a) ampere (A) (b) volt (V) (c) ohm (Ω) (d) watt (W)
37. 37.Which of these is measured in watts (W)? (a) energy used each second (b) voltage (c) current (d) the push of a cell
38. 38.📏 How many milliamperes (mA) is 0.71 A?
39. 39.📏 Which unit measures resistance? (a) volt (V) (b) ohm (Ω) (c) watt (W) (d) ampere (A)
40. 40.True or false: the voltmeter is joined in series. (a) False (b) True

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