Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 78 · 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 2.5 A?
2. 2.📏 How many kilowatts (kW) is 3150 W? =
3. 3.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
4. 4.📏 Which unit measures voltage? (a) volt (V) (b) watt (W) (c) ampere (A) (d) ohm (Ω)
5. 5.True or false: energy used each second is measured in watts (W). (a) True (b) False
6. 6.📏 How many kilowatts (kW) is 1950 W? =
7. 7.📏 How many ohms (Ω) is 5.4 kΩ?
8. 8.True or false: the ammeter measures current. (a) True (b) False
9. 9.📏 How many watts (W) is 2.3 kW?
10. 10.True or false: the voltmeter is joined in series. (a) False (b) True
11. 11.Which of these is measured in watts (W)? (a) voltage (b) resistance (c) power (d) the flow of charge
12. 12.📏 How many ohms (Ω) is 4.7 kΩ?
13. 13.📏 How many watts (W) is 2.9 kW?
14. 14.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
15. 15.Which of these is measured in amperes (A)? (a) power (b) the flow of charge (c) voltage (d) how much a part resists
16. 16.📏 How many amperes (A) is 2890 mA? =
17. 17.📏 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
18. 18.📏 How many amperes (A) is 170 mA? =
19. 19.True or false: energy used each second is measured in amperes (A). (a) False (b) True
20. 20.📏 Which unit measures how much a part resists? (a) ampere (A) (b) ohm (Ω) (c) watt (W) (d) volt (V)
21. 21.Which of these is measured in volts (V)? (a) current (b) how much a part resists (c) voltage (d) resistance
22. 22.True or false: the ammeter is joined across a part. (a) False (b) True
23. 23.True or false: voltage is measured in volts (V). (a) True (b) False
24. 24.📏 How many milliamperes (mA) is 0.86 A?
25. 25.True or false: the push of a cell is measured in amperes (A). (a) True (b) False
26. 26.📏 How many milliamperes (mA) is 1.15 A?
27. 27.📏 Which unit measures resistance? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
28. 28.📏 How many ohms (Ω) is 7.6 kΩ?
29. 29.📏 Which unit measures the push of a cell? (a) ohm (Ω) (b) ampere (A) (c) watt (W) (d) volt (V)
30. 30.📏 How many watts (W) is 3 kW?
31. 31.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
32. 32.📏 How many kilowatts (kW) is 600 W? =
33. 33.True or false: resistance is measured in amperes (A). (a) False (b) True
34. 34.📏 Which unit measures current? (a) volt (V) (b) ohm (Ω) (c) ampere (A) (d) watt (W)
35. 35.True or false: current is measured in watts (W). (a) True (b) False
36. 36.Which of these is measured in watts (W)? (a) resistance (b) energy used each second (c) the flow of charge (d) the push of a cell
37. 37.True or false: current is measured in volts (V). (a) True (b) False
38. 38.📏 How many amperes (A) is 540 mA? =
39. 39.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
40. 40.📏 In the water-pipe picture of a circuit, resistance is like … (a) the flow of water (b) the water pressure (c) a bigger tank (d) a narrow pipe

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