Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 2 · 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, resistance is like … (a) the water pressure (b) a bigger tank (c) the flow of water (d) a narrow pipe
2. 2.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
3. 3.📏 Which unit measures energy used each second? (a) ohm (Ω) (b) volt (V) (c) ampere (A) (d) watt (W)
4. 4.📏 Which unit measures how much a part resists? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
5. 5.📏 How many watts (W) is 3.9 kW?
6. 6.📏 How many kilowatts (kW) is 4950 W? =
7. 7.True or false: the push of a cell is measured in volts (V). (a) False (b) True
8. 8.True or false: the ammeter measures voltage. (a) False (b) True
9. 9.📏 How many kilowatts (kW) is 2950 W? =
10. 10.Which of these is measured in ohms (Ω)? (a) the flow of charge (b) the push of a cell (c) energy used each second (d) resistance
11. 11.True or false: the voltmeter is joined in series. (a) False (b) True
12. 12.📏 How many milliamperes (mA) is 1.87 A?
13. 13.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
14. 14.📏 How many ohms (Ω) is 0.7 kΩ?
15. 15.📏 Which unit measures current? (a) ohm (Ω) (b) watt (W) (c) volt (V) (d) ampere (A)
16. 16.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
17. 17.📏 How many amperes (A) is 2900 mA? =
18. 18.True or false: energy used each second is measured in amperes (A). (a) True (b) False
19. 19.📏 In the water-pipe picture of a circuit, current is like … (a) a narrow pipe (b) the flow of water (c) the water pressure (d) the pipe colour
20. 20.📏 Which unit measures resistance? (a) watt (W) (b) ampere (A) (c) ohm (Ω) (d) volt (V)
21. 21.True or false: the voltmeter measures current. (a) False (b) True
22. 22.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water tank lid (b) the water pressure (c) the tap handle (d) the pipe colour
23. 23.Which of these is measured in watts (W)? (a) resistance (b) current (c) power (d) how much a part resists
24. 24.📏 How many amperes (A) is 2710 mA? =
25. 25.True or false: the ammeter measures current. (a) False (b) True
26. 26.Which of these is measured in ohms (Ω)? (a) energy used each second (b) the flow of charge (c) current (d) how much a part resists
27. 27.True or false: resistance is measured in ohms (Ω). (a) True (b) False
28. 28.True or false: the ammeter is joined in series. (a) False (b) True
29. 29.📏 How many watts (W) is 3.8 kW?
30. 30.📏 How many kilowatts (kW) is 2150 W? =
31. 31.📏 How many milliamperes (mA) is 1.01 A?
32. 32.📏 How many amperes (A) is 2570 mA? =
33. 33.📏 How many kilowatts (kW) is 2800 W? =
34. 34.📏 How many amperes (A) is 590 mA? =
35. 35.📏 How many watts (W) is 1.9 kW?
36. 36.📏 How many amperes (A) is 470 mA? =
37. 37.True or false: how much a part resists is measured in amperes (A). (a) True (b) False
38. 38.📏 How many milliamperes (mA) make 1 ampere? (a) 60 (b) 10 (c) 1000 (d) 100
39. 39.📏 Which unit measures voltage? (a) watt (W) (b) ampere (A) (c) volt (V) (d) ohm (Ω)
40. 40.True or false: power is measured in ohms (Ω). (a) True (b) False

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