Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 445 · 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 the flow of charge? (a) volt (V) (b) ampere (A) (c) ohm (Ω) (d) watt (W)
2. 2.📏 How many watts (W) is 2.3 kW?
3. 3.📏 Which unit measures voltage? (a) watt (W) (b) ampere (A) (c) ohm (Ω) (d) volt (V)
4. 4.📏 Which unit measures current? (a) watt (W) (b) volt (V) (c) ampere (A) (d) ohm (Ω)
5. 5.True or false: the voltmeter is joined across a part. (a) False (b) True
6. 6.📏 Which unit measures power? (a) ampere (A) (b) volt (V) (c) watt (W) (d) ohm (Ω)
7. 7.Which of these is measured in ohms (Ω)? (a) the flow of charge (b) how much a part resists (c) the push of a cell (d) current
8. 8.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
9. 9.Which of these is measured in watts (W)? (a) voltage (b) energy used each second (c) resistance (d) how much a part resists
10. 10.📏 Which unit measures energy used each second? (a) watt (W) (b) volt (V) (c) ampere (A) (d) ohm (Ω)
11. 11.📏 How many milliamperes (mA) make 1 ampere? (a) 10 (b) 100 (c) 60 (d) 1000
12. 12.True or false: power is measured in ohms (Ω). (a) True (b) False
13. 13.True or false: voltage is measured in volts (V). (a) True (b) False
14. 14.Which of these is measured in amperes (A)? (a) power (b) how much a part resists (c) resistance (d) current
15. 15.📏 How many ohms (Ω) is 6.7 kΩ?
16. 16.📏 In the water-pipe picture of a circuit, current is like … (a) the pipe colour (b) the water pressure (c) the flow of water (d) a narrow pipe
17. 17.True or false: energy used each second is measured in watts (W). (a) False (b) True
18. 18.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
19. 19.True or false: the voltmeter is joined in series. (a) False (b) True
20. 20.True or false: the ammeter is joined in series. (a) False (b) True
21. 21.📏 Which unit measures resistance? (a) watt (W) (b) volt (V) (c) ohm (Ω) (d) ampere (A)
22. 22.📏 How many watts (W) is 1.4 kW?
23. 23.📏 How many amperes (A) is 580 mA? =
24. 24.True or false: the ammeter measures voltage. (a) False (b) True
25. 25.True or false: the push of a cell is measured in volts (V). (a) True (b) False
26. 26.📏 How many milliamperes (mA) is 0.56 A?
27. 27.True or false: the voltmeter measures voltage. (a) False (b) True
28. 28.True or false: the voltmeter measures current. (a) False (b) True
29. 29.True or false: power is measured in watts (W). (a) False (b) True
30. 30.True or false: voltage is measured in amperes (A). (a) True (b) False
31. 31.True or false: the flow of charge is measured in amperes (A). (a) False (b) True
32. 32.True or false: how much a part resists is measured in ohms (Ω). (a) False (b) True
33. 33.True or false: energy used each second is measured in amperes (A). (a) True (b) False
34. 34.📏 How many milliamperes (mA) is 0.22 A?
35. 35.True or false: current is measured in volts (V). (a) False (b) True
36. 36.📏 How many ohms (Ω) is 8.2 kΩ?
37. 37.📏 In the water-pipe picture of a circuit, resistance is like … (a) a narrow pipe (b) a bigger tank (c) the flow of water (d) the water pressure
38. 38.True or false: power is measured in volts (V). (a) True (b) False
39. 39.Which of these is measured in volts (V)? (a) how much a part resists (b) power (c) energy used each second (d) voltage
40. 40.📏 How many kilo-ohms (kΩ) is 9200 Ω? =

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