Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 225 · 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 how much a part resists? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
2. 2.📏 In the water-pipe picture of a circuit, resistance is like … (a) the water pressure (b) the flow of water (c) a bigger tank (d) a narrow pipe
3. 3.📏 In the water-pipe picture of a circuit, current is like … (a) the pipe colour (b) a narrow pipe (c) the flow of water (d) the water pressure
4. 4.📏 How many watts (W) is 0.4 kW?
5. 5.True or false: voltage is measured in volts (V). (a) True (b) False
6. 6.True or false: current is measured in amperes (A). (a) True (b) False
7. 7.Which of these is measured in amperes (A)? (a) how much a part resists (b) current (c) the push of a cell (d) resistance
8. 8.Which of these is measured in watts (W)? (a) energy used each second (b) how much a part resists (c) current (d) the push of a cell
9. 9.True or false: how much a part resists is measured in amperes (A). (a) True (b) False
10. 10.📏 How many milliamperes (mA) is 1.98 A?
11. 11.Which of these is measured in watts (W)? (a) current (b) the flow of charge (c) voltage (d) power
12. 12.True or false: the ammeter is joined in series. (a) True (b) False
13. 13.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
14. 14.True or false: the ammeter is joined across a part. (a) False (b) True
15. 15.True or false: the push of a cell is measured in amperes (A). (a) True (b) False
16. 16.📏 Which unit measures energy used each second? (a) volt (V) (b) ampere (A) (c) ohm (Ω) (d) watt (W)
17. 17.📏 How many kilowatts (kW) is 250 W? =
18. 18.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
19. 19.📏 How many milliamperes (mA) make 1 ampere? (a) 60 (b) 10 (c) 1000 (d) 100
20. 20.📏 How many kilowatts (kW) is 350 W? =
21. 21.Which of these is measured in volts (V)? (a) how much a part resists (b) current (c) voltage (d) energy used each second
22. 22.📏 How many milliamperes (mA) is 2.22 A?
23. 23.📏 How many amperes (A) is 630 mA? =
24. 24.📏 How many kilo-ohms (kΩ) is 8200 Ω? =
25. 25.📏 Which unit measures power? (a) watt (W) (b) ampere (A) (c) ohm (Ω) (d) volt (V)
26. 26.📏 Which unit measures the push of a cell? (a) watt (W) (b) volt (V) (c) ampere (A) (d) ohm (Ω)
27. 27.True or false: the flow of charge is measured in amperes (A). (a) False (b) True
28. 28.Which of these is measured in amperes (A)? (a) the flow of charge (b) voltage (c) resistance (d) how much a part resists
29. 29.📏 How many amperes (A) is 860 mA? =
30. 30.📏 How many watts (W) is 2.8 kW?
31. 31.📏 Which unit measures the flow of charge? (a) ohm (Ω) (b) volt (V) (c) watt (W) (d) ampere (A)
32. 32.📏 How many ohms (Ω) is 0.6 kΩ?
33. 33.True or false: resistance is measured in watts (W). (a) True (b) False
34. 34.True or false: the push of a cell is measured in watts (W). (a) False (b) True
35. 35.📏 How many watts (W) is 3 kW?
36. 36.True or false: current is measured in watts (W). (a) True (b) False
37. 37.📏 How many kilo-ohms (kΩ) is 3900 Ω? =
38. 38.📏 How many kilo-ohms (kΩ) is 3700 Ω? =
39. 39.📏 Voltmeter or ammeter: which one is joined in series? (a) voltmeter (b) ammeter
40. 40.True or false: energy used each second is measured in watts (W). (a) False (b) True

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