Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 748 · 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 watts (W) is 1.8 kW?
2. 2.True or false: resistance is measured in amperes (A). (a) True (b) False
3. 3.📏 Which unit measures the push of a cell? (a) ohm (Ω) (b) ampere (A) (c) watt (W) (d) volt (V)
4. 4.📏 How many watts (W) is 4.2 kW?
5. 5.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1000 (b) 1024 (c) 10 (d) 100
6. 6.True or false: energy used each second is measured in watts (W). (a) True (b) False
7. 7.📏 In the water-pipe picture of a circuit, voltage is like … (a) the tap handle (b) the pipe colour (c) the water tank lid (d) the water pressure
8. 8.📏 In the water-pipe picture of a circuit, resistance is like … (a) a bigger tank (b) the flow of water (c) a narrow pipe (d) the water pressure
9. 9.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
10. 10.True or false: the ammeter is joined in series. (a) False (b) True
11. 11.True or false: current is measured in watts (W). (a) False (b) True
12. 12.📏 Which unit measures current? (a) volt (V) (b) ampere (A) (c) watt (W) (d) ohm (Ω)
13. 13.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
14. 14.True or false: the voltmeter measures voltage. (a) False (b) True
15. 15.True or false: the voltmeter is joined across a part. (a) False (b) True
16. 16.📏 How many watts (W) is 3 kW?
17. 17.📏 Which unit measures energy used each second? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
18. 18.True or false: the voltmeter measures current. (a) True (b) False
19. 19.Which of these is measured in amperes (A)? (a) current (b) voltage (c) the push of a cell (d) how much a part resists
20. 20.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
21. 21.📏 How many kilowatts (kW) is 1200 W? =
22. 22.True or false: energy used each second is measured in ohms (Ω). (a) True (b) False
23. 23.📏 How many watts (W) is 0.3 kW?
24. 24.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
25. 25.📏 How many milliamperes (mA) is 0.94 A?
26. 26.📏 Which unit measures how much a part resists? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
27. 27.📏 How many milliamperes (mA) is 1.94 A?
28. 28.📏 How many amperes (A) is 2440 mA? =
29. 29.📏 How many amperes (A) is 1070 mA? =
30. 30.True or false: voltage is measured in volts (V). (a) True (b) False
31. 31.Which of these is measured in ohms (Ω)? (a) energy used each second (b) power (c) the push of a cell (d) how much a part resists
32. 32.📏 How many milliamperes (mA) is 0.97 A?
33. 33.📏 How many kilo-ohms (kΩ) is 9200 Ω? =
34. 34.📏 How many ohms (Ω) is 8.9 kΩ?
35. 35.📏 How many milliamperes (mA) is 1.86 A?
36. 36.📏 How many kilowatts (kW) is 4450 W? =
37. 37.True or false: the flow of charge is measured in ohms (Ω). (a) False (b) True
38. 38.True or false: voltage is measured in ohms (Ω). (a) True (b) False
39. 39.📏 How many amperes (A) is 880 mA? =
40. 40.📏 How many watts (W) is 2.5 kW?

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