Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 427 · 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.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
2. 2.📏 How many watts (W) is 2 kW?
3. 3.📏 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
4. 4.📏 How many amperes (A) is 2940 mA? =
5. 5.📏 How many milliamperes (mA) is 1.03 A?
6. 6.📏 How many milliamperes (mA) make 1 ampere? (a) 100 (b) 1000 (c) 60 (d) 10
7. 7.📏 How many amperes (A) is 2610 mA? =
8. 8.True or false: current is measured in volts (V). (a) True (b) False
9. 9.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water tank lid (b) the tap handle (c) the water pressure (d) the pipe colour
10. 10.True or false: the push of a cell is measured in ohms (Ω). (a) False (b) True
11. 11.📏 Which unit measures power? (a) volt (V) (b) ampere (A) (c) ohm (Ω) (d) watt (W)
12. 12.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
13. 13.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
14. 14.📏 How many amperes (A) is 2970 mA? =
15. 15.📏 How many amperes (A) is 2750 mA? =
16. 16.True or false: how much a part resists is measured in ohms (Ω). (a) False (b) True
17. 17.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
18. 18.True or false: energy used each second is measured in amperes (A). (a) False (b) True
19. 19.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 100 (b) 10 (c) 1024 (d) 1000
20. 20.True or false: voltage is measured in watts (W). (a) False (b) True
21. 21.True or false: the ammeter is joined in series. (a) False (b) True
22. 22.Which of these is measured in watts (W)? (a) how much a part resists (b) voltage (c) current (d) power
23. 23.📏 Which unit measures resistance? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
24. 24.📏 How many ohms (Ω) is 0.8 kΩ?
25. 25.📏 How many kilowatts (kW) is 600 W? =
26. 26.📏 Which unit measures the flow of charge? (a) ampere (A) (b) ohm (Ω) (c) watt (W) (d) volt (V)
27. 27.📏 How many amperes (A) is 270 mA? =
28. 28.True or false: power is measured in watts (W). (a) True (b) False
29. 29.📏 How many ohms (Ω) is 1 kΩ?
30. 30.True or false: the ammeter is joined across a part. (a) False (b) True
31. 31.True or false: the voltmeter is joined in series. (a) True (b) False
32. 32.True or false: the push of a cell is measured in volts (V). (a) True (b) False
33. 33.📏 Which unit measures voltage? (a) volt (V) (b) ohm (Ω) (c) ampere (A) (d) watt (W)
34. 34.True or false: the voltmeter measures voltage. (a) False (b) True
35. 35.📏 Which unit measures current? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
36. 36.📏 How many ohms (Ω) is 5 kΩ?
37. 37.📏 How many kilo-ohms (kΩ) is 2900 Ω? =
38. 38.📏 How many milliamperes (mA) is 2.31 A?
39. 39.📏 How many amperes (A) is 880 mA? =
40. 40.📏 Which unit measures energy used each second? (a) ampere (A) (b) ohm (Ω) (c) volt (V) (d) watt (W)

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