Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 151 · 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.📏 In the water-pipe picture of a circuit, current is like … (a) the water pressure (b) the flow of water (c) a narrow pipe (d) the pipe colour
2. 2.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
3. 3.📏 How many ohms (Ω) is 4.9 kΩ?
4. 4.📏 Which unit measures voltage? (a) volt (V) (b) ampere (A) (c) ohm (Ω) (d) watt (W)
5. 5.True or false: the push of a cell is measured in ohms (Ω). (a) True (b) False
6. 6.📏 Which unit measures current? (a) volt (V) (b) ampere (A) (c) ohm (Ω) (d) watt (W)
7. 7.📏 How many amperes (A) is 130 mA? =
8. 8.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 100 (b) 10 (c) 1024 (d) 1000
9. 9.📏 Which unit measures how much a part resists? (a) volt (V) (b) ampere (A) (c) ohm (Ω) (d) watt (W)
10. 10.True or false: the ammeter measures current. (a) False (b) True
11. 11.Which of these is measured in amperes (A)? (a) voltage (b) power (c) the flow of charge (d) the push of a cell
12. 12.📏 How many ohms (Ω) is 0.1 kΩ?
13. 13.📏 How many amperes (A) is 2950 mA? =
14. 14.📏 How many ohms (Ω) is 6.4 kΩ?
15. 15.Which of these is measured in amperes (A)? (a) how much a part resists (b) the push of a cell (c) current (d) power
16. 16.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
17. 17.True or false: the ammeter is joined in series. (a) False (b) True
18. 18.True or false: power is measured in watts (W). (a) True (b) False
19. 19.📏 How many ohms (Ω) is 7 kΩ?
20. 20.📏 In the water-pipe picture of a circuit, resistance is like … (a) a bigger tank (b) the water pressure (c) a narrow pipe (d) the flow of water
21. 21.True or false: power is measured in volts (V). (a) True (b) False
22. 22.True or false: the voltmeter measures current. (a) False (b) True
23. 23.📏 How many milliamperes (mA) is 2.47 A?
24. 24.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
25. 25.📏 Which unit measures power? (a) volt (V) (b) ohm (Ω) (c) watt (W) (d) ampere (A)
26. 26.📏 How many watts (W) is 0.7 kW?
27. 27.📏 How many milliamperes (mA) is 1.27 A?
28. 28.True or false: the ammeter is joined across a part. (a) False (b) True
29. 29.📏 How many milliamperes (mA) is 0.71 A?
30. 30.True or false: the voltmeter is joined across a part. (a) True (b) False
31. 31.Which of these is measured in watts (W)? (a) the push of a cell (b) current (c) the flow of charge (d) power
32. 32.📏 How many watts (W) is 0.8 kW?
33. 33.📏 Which unit measures the flow of charge? (a) volt (V) (b) ampere (A) (c) ohm (Ω) (d) watt (W)
34. 34.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
35. 35.📏 In the water-pipe picture of a circuit, voltage is like … (a) the pipe colour (b) the water pressure (c) the tap handle (d) the water tank lid
36. 36.📏 How many milliamperes (mA) is 1.66 A?
37. 37.📏 How many milliamperes (mA) is 0.61 A?
38. 38.Which of these is measured in volts (V)? (a) energy used each second (b) how much a part resists (c) voltage (d) power
39. 39.📏 How many milliamperes (mA) make 1 ampere? (a) 60 (b) 1000 (c) 100 (d) 10
40. 40.📏 How many watts (W) is 0.4 kW?

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