Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 785 · 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) is 0.86 A?
2. 2.True or false: the ammeter measures voltage. (a) False (b) True
3. 3.📏 Which unit measures how much a part resists? (a) watt (W) (b) ohm (Ω) (c) ampere (A) (d) volt (V)
4. 4.📏 How many watts (W) is 2.8 kW?
5. 5.True or false: current is measured in amperes (A). (a) False (b) True
6. 6.📏 How many watts (W) is 4.3 kW?
7. 7.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
8. 8.True or false: the voltmeter measures voltage. (a) False (b) True
9. 9.📏 How many kilo-ohms (kΩ) is 9400 Ω? =
10. 10.Which of these is measured in ohms (Ω)? (a) energy used each second (b) the push of a cell (c) resistance (d) the flow of charge
11. 11.📏 How many ohms (Ω) is 2.5 kΩ?
12. 12.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1024 (b) 1000 (c) 100 (d) 10
13. 13.📏 How many milliamperes (mA) is 0.54 A?
14. 14.True or false: how much a part resists is measured in volts (V). (a) True (b) False
15. 15.Which of these is measured in volts (V)? (a) voltage (b) current (c) energy used each second (d) power
16. 16.📏 Which unit measures resistance? (a) ohm (Ω) (b) watt (W) (c) volt (V) (d) ampere (A)
17. 17.Which of these is measured in volts (V)? (a) the flow of charge (b) how much a part resists (c) resistance (d) the push of a cell
18. 18.True or false: the ammeter is joined in series. (a) False (b) True
19. 19.📏 How many amperes (A) is 1720 mA? =
20. 20.True or false: the flow of charge is measured in amperes (A). (a) False (b) True
21. 21.📏 How many amperes (A) is 1520 mA? =
22. 22.True or false: the ammeter measures current. (a) False (b) True
23. 23.Which of these is measured in amperes (A)? (a) energy used each second (b) the push of a cell (c) current (d) voltage
24. 24.Which of these is measured in amperes (A)? (a) energy used each second (b) power (c) voltage (d) the flow of charge
25. 25.📏 In the water-pipe picture of a circuit, resistance is like … (a) a bigger tank (b) the flow of water (c) the water pressure (d) a narrow pipe
26. 26.📏 Which unit measures the flow of charge? (a) volt (V) (b) ohm (Ω) (c) ampere (A) (d) watt (W)
27. 27.📏 In the water-pipe picture of a circuit, voltage is like … (a) the pipe colour (b) the tap handle (c) the water tank lid (d) the water pressure
28. 28.📏 How many milliamperes (mA) make 1 ampere? (a) 100 (b) 60 (c) 1000 (d) 10
29. 29.📏 How many watts (W) is 1.9 kW?
30. 30.📏 Which unit measures voltage? (a) volt (V) (b) ohm (Ω) (c) watt (W) (d) ampere (A)
31. 31.📏 How many amperes (A) is 1730 mA? =
32. 32.📏 How many kilo-ohms (kΩ) is 200 Ω? =
33. 33.📏 Which unit measures energy used each second? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
34. 34.📏 Which unit measures power? (a) ampere (A) (b) volt (V) (c) watt (W) (d) ohm (Ω)
35. 35.True or false: the voltmeter measures current. (a) False (b) True
36. 36.True or false: the voltmeter is joined across a part. (a) True (b) False
37. 37.📏 How many milliamperes (mA) is 2.54 A?
38. 38.📏 How many ohms (Ω) is 8 kΩ?
39. 39.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
40. 40.True or false: the voltmeter is joined in series. (a) False (b) True

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