Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 364 · 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, voltage is like … (a) the water pressure (b) the water tank lid (c) the tap handle (d) the pipe colour
2. 2.📏 How many amperes (A) is 640 mA? =
3. 3.True or false: current is measured in amperes (A). (a) False (b) True
4. 4.📏 How many amperes (A) is 960 mA? =
5. 5.📏 How many watts (W) is 4.5 kW?
6. 6.True or false: current is measured in watts (W). (a) True (b) False
7. 7.📏 In the water-pipe picture of a circuit, resistance is like … (a) the flow of water (b) a bigger tank (c) a narrow pipe (d) the water pressure
8. 8.📏 Which unit measures power? (a) volt (V) (b) ampere (A) (c) watt (W) (d) ohm (Ω)
9. 9.Which of these is measured in volts (V)? (a) voltage (b) energy used each second (c) how much a part resists (d) resistance
10. 10.📏 How many ohms (Ω) is 5.7 kΩ?
11. 11.True or false: the ammeter is joined in series. (a) False (b) True
12. 12.True or false: the ammeter measures current. (a) False (b) True
13. 13.True or false: power is measured in volts (V). (a) True (b) False
14. 14.📏 How many amperes (A) is 1640 mA? =
15. 15.📏 Which unit measures energy used each second? (a) volt (V) (b) ohm (Ω) (c) ampere (A) (d) watt (W)
16. 16.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
17. 17.📏 Which unit measures resistance? (a) volt (V) (b) ampere (A) (c) watt (W) (d) ohm (Ω)
18. 18.Which of these is measured in volts (V)? (a) the flow of charge (b) resistance (c) current (d) the push of a cell
19. 19.📏 How many milliamperes (mA) make 1 ampere? (a) 10 (b) 100 (c) 60 (d) 1000
20. 20.📏 How many milliamperes (mA) is 1.99 A?
21. 21.True or false: how much a part resists is measured in amperes (A). (a) True (b) False
22. 22.📏 Which unit measures how much a part resists? (a) volt (V) (b) watt (W) (c) ohm (Ω) (d) ampere (A)
23. 23.Which of these is measured in ohms (Ω)? (a) the push of a cell (b) power (c) resistance (d) the flow of charge
24. 24.📏 Which unit measures voltage? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
25. 25.📏 Which unit measures the push of a cell? (a) ampere (A) (b) volt (V) (c) ohm (Ω) (d) watt (W)
26. 26.📏 How many milliamperes (mA) is 1.94 A?
27. 27.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 10 (b) 100 (c) 1000 (d) 1024
28. 28.True or false: power is measured in watts (W). (a) False (b) True
29. 29.📏 How many ohms (Ω) is 6.5 kΩ?
30. 30.True or false: the push of a cell is measured in ohms (Ω). (a) True (b) False
31. 31.📏 How many watts (W) is 1 kW?
32. 32.True or false: the flow of charge is measured in volts (V). (a) False (b) True
33. 33.📏 How many watts (W) is 2.2 kW?
34. 34.True or false: the push of a cell is measured in volts (V). (a) False (b) True
35. 35.📏 How many milliamperes (mA) is 0.74 A?
36. 36.True or false: the ammeter is joined across a part. (a) False (b) True
37. 37.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
38. 38.📏 How many watts (W) is 1.7 kW?
39. 39.📏 Which unit measures the flow of charge? (a) volt (V) (b) ohm (Ω) (c) watt (W) (d) ampere (A)
40. 40.True or false: voltage is measured in volts (V). (a) False (b) True

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