Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 525 · 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 ohms make 1 kilo-ohm (kΩ)? (a) 100 (b) 1024 (c) 10 (d) 1000
2. 2.True or false: current is measured in ohms (Ω). (a) True (b) False
3. 3.True or false: energy used each second is measured in watts (W). (a) False (b) True
4. 4.📏 How many kilowatts (kW) is 3900 W? =
5. 5.Which of these is measured in ohms (Ω)? (a) the flow of charge (b) energy used each second (c) power (d) how much a part resists
6. 6.True or false: the push of a cell is measured in volts (V). (a) True (b) False
7. 7.Which of these is measured in volts (V)? (a) voltage (b) the flow of charge (c) how much a part resists (d) energy used each second
8. 8.📏 How many milliamperes (mA) make 1 ampere? (a) 100 (b) 60 (c) 10 (d) 1000
9. 9.📏 Which unit measures voltage? (a) watt (W) (b) ohm (Ω) (c) volt (V) (d) ampere (A)
10. 10.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
11. 11.True or false: the push of a cell is measured in watts (W). (a) False (b) True
12. 12.📏 Which unit measures how much a part resists? (a) ampere (A) (b) ohm (Ω) (c) watt (W) (d) volt (V)
13. 13.📏 How many kilo-ohms (kΩ) is 5100 Ω? =
14. 14.True or false: power is measured in watts (W). (a) True (b) False
15. 15.📏 Which unit measures the flow of charge? (a) volt (V) (b) ohm (Ω) (c) watt (W) (d) ampere (A)
16. 16.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
17. 17.📏 How many amperes (A) is 2780 mA? =
18. 18.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
19. 19.📏 How many kilo-ohms (kΩ) is 8700 Ω? =
20. 20.True or false: the voltmeter is joined in series. (a) True (b) False
21. 21.True or false: the ammeter is joined in series. (a) False (b) True
22. 22.True or false: the push of a cell is measured in amperes (A). (a) True (b) False
23. 23.📏 How many kilowatts (kW) is 3700 W? =
24. 24.📏 How many kilowatts (kW) is 400 W? =
25. 25.📏 Which unit measures current? (a) watt (W) (b) ampere (A) (c) volt (V) (d) ohm (Ω)
26. 26.📏 In the water-pipe picture of a circuit, resistance is like … (a) the water pressure (b) a bigger tank (c) a narrow pipe (d) the flow of water
27. 27.📏 How many watts (W) is 4.2 kW?
28. 28.📏 How many watts (W) is 0.3 kW?
29. 29.📏 How many milliamperes (mA) is 2.9 A?
30. 30.📏 How many milliamperes (mA) is 0.24 A?
31. 31.True or false: the ammeter is joined across a part. (a) False (b) True
32. 32.📏 How many ohms (Ω) is 7.9 kΩ?
33. 33.📏 How many amperes (A) is 740 mA? =
34. 34.True or false: how much a part resists is measured in watts (W). (a) False (b) True
35. 35.True or false: the voltmeter is joined across a part. (a) False (b) True
36. 36.True or false: how much a part resists is measured in amperes (A). (a) True (b) False
37. 37.True or false: the voltmeter measures current. (a) True (b) False
38. 38.📏 How many kilowatts (kW) is 850 W? =
39. 39.True or false: the voltmeter measures voltage. (a) False (b) True
40. 40.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter

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