Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 330 · 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.📏 How many milliamperes (mA) is 0.23 A?
2. 2.📏 How many amperes (A) is 420 mA? =
3. 3.True or false: resistance is measured in watts (W). (a) False (b) True
4. 4.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
5. 5.True or false: the ammeter is joined in series. (a) False (b) True
6. 6.True or false: the voltmeter is joined across a part. (a) True (b) False
7. 7.📏 How many milliamperes (mA) is 2.72 A?
8. 8.📏 How many milliamperes (mA) is 1.43 A?
9. 9.True or false: voltage is measured in watts (W). (a) True (b) False
10. 10.True or false: voltage is measured in volts (V). (a) False (b) True
11. 11.📏 How many amperes (A) is 2220 mA? =
12. 12.📏 How many watts (W) is 1 kW?
13. 13.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
14. 14.True or false: power is measured in volts (V). (a) True (b) False
15. 15.True or false: energy used each second is measured in watts (W). (a) False (b) True
16. 16.📏 Voltmeter or ammeter: which one is joined in series? (a) voltmeter (b) ammeter
17. 17.📏 Which unit measures the push of a cell? (a) watt (W) (b) ohm (Ω) (c) volt (V) (d) ampere (A)
18. 18.📏 In the water-pipe picture of a circuit, current is like … (a) the pipe colour (b) the water pressure (c) a narrow pipe (d) the flow of water
19. 19.Which of these is measured in watts (W)? (a) energy used each second (b) how much a part resists (c) resistance (d) the flow of charge
20. 20.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water pressure (b) the pipe colour (c) the tap handle (d) the water tank lid
21. 21.📏 Which unit measures resistance? (a) volt (V) (b) watt (W) (c) ohm (Ω) (d) ampere (A)
22. 22.📏 How many kilowatts (kW) is 1300 W? =
23. 23.True or false: the voltmeter is joined in series. (a) False (b) True
24. 24.Which of these is measured in amperes (A)? (a) resistance (b) current (c) energy used each second (d) power
25. 25.📏 Which unit measures power? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
26. 26.True or false: current is measured in watts (W). (a) True (b) False
27. 27.📏 How many amperes (A) is 2950 mA? =
28. 28.True or false: voltage is measured in amperes (A). (a) False (b) True
29. 29.Which of these is measured in ohms (Ω)? (a) resistance (b) the flow of charge (c) current (d) power
30. 30.📏 How many milliamperes (mA) is 0.89 A?
31. 31.📏 How many kilowatts (kW) is 1150 W? =
32. 32.True or false: the push of a cell is measured in watts (W). (a) False (b) True
33. 33.📏 How many watts (W) is 2 kW?
34. 34.📏 How many ohms (Ω) is 1.9 kΩ?
35. 35.📏 How many amperes (A) is 790 mA? =
36. 36.📏 Which unit measures current? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
37. 37.📏 Which unit measures energy used each second? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
38. 38.📏 How many kilowatts (kW) is 150 W? =
39. 39.True or false: how much a part resists is measured in ohms (Ω). (a) True (b) False
40. 40.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 100 (b) 1000 (c) 1024 (d) 10

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