Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 218 · 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) make 1 ampere? (a) 1000 (b) 10 (c) 60 (d) 100
2. 2.Which of these is measured in ohms (Ω)? (a) energy used each second (b) how much a part resists (c) current (d) power
3. 3.📏 In the water-pipe picture of a circuit, current is like … (a) the water pressure (b) a narrow pipe (c) the pipe colour (d) the flow of water
4. 4.True or false: the voltmeter measures current. (a) False (b) True
5. 5.Which of these is measured in amperes (A)? (a) current (b) voltage (c) power (d) resistance
6. 6.True or false: the ammeter measures voltage. (a) True (b) False
7. 7.True or false: the voltmeter is joined in series. (a) True (b) False
8. 8.True or false: the ammeter is joined across a part. (a) True (b) False
9. 9.📏 Which unit measures voltage? (a) watt (W) (b) volt (V) (c) ampere (A) (d) ohm (Ω)
10. 10.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
11. 11.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
12. 12.📏 Which unit measures the flow of charge? (a) watt (W) (b) volt (V) (c) ohm (Ω) (d) ampere (A)
13. 13.📏 Voltmeter or ammeter: which one is joined in series? (a) voltmeter (b) ammeter
14. 14.📏 How many ohms (Ω) is 0.9 kΩ?
15. 15.📏 How many kilowatts (kW) is 500 W? =
16. 16.📏 How many ohms (Ω) is 1.3 kΩ?
17. 17.📏 How many milliamperes (mA) is 1.66 A?
18. 18.True or false: the flow of charge is measured in amperes (A). (a) False (b) True
19. 19.📏 Which unit measures energy used each second? (a) ohm (Ω) (b) volt (V) (c) ampere (A) (d) watt (W)
20. 20.Which of these is measured in ohms (Ω)? (a) the flow of charge (b) energy used each second (c) resistance (d) current
21. 21.Which of these is measured in volts (V)? (a) resistance (b) voltage (c) energy used each second (d) how much a part resists
22. 22.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 100 (b) 10 (c) 1024 (d) 1000
23. 23.📏 How many watts (W) is 2.5 kW?
24. 24.📏 How many kilowatts (kW) is 2500 W? =
25. 25.📏 How many watts (W) is 0.6 kW?
26. 26.📏 Which unit measures how much a part resists? (a) volt (V) (b) watt (W) (c) ampere (A) (d) ohm (Ω)
27. 27.📏 How many watts (W) is 4.9 kW?
28. 28.📏 Which unit measures current? (a) ohm (Ω) (b) volt (V) (c) ampere (A) (d) watt (W)
29. 29.📏 How many milliamperes (mA) is 0.46 A?
30. 30.True or false: the voltmeter is joined across a part. (a) True (b) False
31. 31.True or false: voltage is measured in volts (V). (a) True (b) False
32. 32.📏 How many ohms (Ω) is 4.5 kΩ?
33. 33.True or false: the flow of charge is measured in ohms (Ω). (a) True (b) False
34. 34.True or false: the flow of charge is measured in volts (V). (a) False (b) True
35. 35.📏 In the water-pipe picture of a circuit, resistance is like … (a) a narrow pipe (b) the flow of water (c) a bigger tank (d) the water pressure
36. 36.📏 Which unit measures resistance? (a) ohm (Ω) (b) volt (V) (c) watt (W) (d) ampere (A)
37. 37.📏 How many kilowatts (kW) is 2050 W? =
38. 38.📏 How many amperes (A) is 1800 mA? =
39. 39.📏 How many watts (W) is 4.8 kW?
40. 40.📏 How many watts (W) is 0.5 kW?

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