Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 561 · 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 watts (W) is 3.1 kW?
2. 2.Which of these is measured in volts (V)? (a) the flow of charge (b) the push of a cell (c) how much a part resists (d) current
3. 3.Which of these is measured in amperes (A)? (a) voltage (b) energy used each second (c) current (d) how much a part resists
4. 4.📏 How many milliamperes (mA) is 0.77 A?
5. 5.📏 How many amperes (A) is 1820 mA? =
6. 6.True or false: the voltmeter measures voltage. (a) True (b) False
7. 7.True or false: the flow of charge is measured in amperes (A). (a) True (b) False
8. 8.📏 Which unit measures voltage? (a) volt (V) (b) ohm (Ω) (c) ampere (A) (d) watt (W)
9. 9.Which of these is measured in volts (V)? (a) energy used each second (b) current (c) voltage (d) power
10. 10.📏 How many milliamperes (mA) is 2.48 A?
11. 11.True or false: the ammeter measures current. (a) True (b) False
12. 12.True or false: the voltmeter is joined across a part. (a) False (b) True
13. 13.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
14. 14.True or false: resistance is measured in volts (V). (a) False (b) True
15. 15.📏 Which unit measures energy used each second? (a) ohm (Ω) (b) ampere (A) (c) watt (W) (d) volt (V)
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: power is measured in watts (W). (a) True (b) False
18. 18.📏 How many amperes (A) is 1790 mA? =
19. 19.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1000 (b) 100 (c) 1024 (d) 10
20. 20.📏 How many kilowatts (kW) is 4100 W? =
21. 21.📏 How many milliamperes (mA) make 1 ampere? (a) 10 (b) 1000 (c) 100 (d) 60
22. 22.📏 Which unit measures the push of a cell? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
23. 23.Which of these is measured in amperes (A)? (a) the push of a cell (b) voltage (c) the flow of charge (d) resistance
24. 24.True or false: the voltmeter is joined in series. (a) False (b) True
25. 25.📏 How many milliamperes (mA) is 0.64 A?
26. 26.📏 How many milliamperes (mA) is 2.99 A?
27. 27.📏 Which unit measures the flow of charge? (a) ampere (A) (b) volt (V) (c) ohm (Ω) (d) watt (W)
28. 28.True or false: energy used each second is measured in volts (V). (a) True (b) False
29. 29.📏 How many ohms (Ω) is 3.4 kΩ?
30. 30.📏 How many amperes (A) is 840 mA? =
31. 31.📏 How many amperes (A) is 1560 mA? =
32. 32.📏 How many watts (W) is 2.2 kW?
33. 33.📏 How many milliamperes (mA) is 2.2 A?
34. 34.📏 How many kilo-ohms (kΩ) is 5100 Ω? =
35. 35.True or false: the ammeter is joined across a part. (a) True (b) False
36. 36.📏 Which unit measures power? (a) watt (W) (b) ampere (A) (c) volt (V) (d) ohm (Ω)
37. 37.True or false: power is measured in volts (V). (a) False (b) True
38. 38.📏 Which unit measures resistance? (a) ampere (A) (b) ohm (Ω) (c) watt (W) (d) volt (V)
39. 39.📏 How many kilo-ohms (kΩ) is 2400 Ω? =
40. 40.📏 How many milliamperes (mA) is 2.32 A?

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