Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 440 · 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 1.51 A?
2. 2.True or false: power is measured in watts (W). (a) True (b) False
3. 3.📏 Which unit measures the flow of charge? (a) volt (V) (b) ohm (Ω) (c) watt (W) (d) ampere (A)
4. 4.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1000 (b) 1024 (c) 100 (d) 10
5. 5.📏 How many watts (W) is 4.2 kW?
6. 6.True or false: the push of a cell is measured in amperes (A). (a) False (b) True
7. 7.True or false: the voltmeter is joined across a part. (a) True (b) False
8. 8.📏 How many amperes (A) is 680 mA? =
9. 9.True or false: the ammeter is joined in series. (a) False (b) True
10. 10.Which of these is measured in ohms (Ω)? (a) voltage (b) the flow of charge (c) how much a part resists (d) current
11. 11.True or false: the ammeter is joined across a part. (a) True (b) False
12. 12.True or false: energy used each second is measured in watts (W). (a) True (b) False
13. 13.True or false: energy used each second is measured in ohms (Ω). (a) True (b) False
14. 14.📏 How many amperes (A) is 1610 mA? =
15. 15.📏 In the water-pipe picture of a circuit, resistance is like … (a) a narrow pipe (b) the flow of water (c) the water pressure (d) a bigger tank
16. 16.📏 Which unit measures energy used each second? (a) volt (V) (b) ohm (Ω) (c) watt (W) (d) ampere (A)
17. 17.Which of these is measured in watts (W)? (a) the push of a cell (b) current (c) resistance (d) energy used each second
18. 18.📏 How many watts (W) is 3.5 kW?
19. 19.True or false: voltage is measured in ohms (Ω). (a) True (b) False
20. 20.📏 How many watts (W) is 4.4 kW?
21. 21.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
22. 22.📏 How many amperes (A) is 1500 mA? =
23. 23.Which of these is measured in watts (W)? (a) resistance (b) voltage (c) current (d) power
24. 24.Which of these is measured in amperes (A)? (a) current (b) energy used each second (c) resistance (d) the push of a cell
25. 25.📏 Which unit measures how much a part resists? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
26. 26.📏 How many watts (W) is 0.2 kW?
27. 27.True or false: the flow of charge is measured in ohms (Ω). (a) False (b) True
28. 28.True or false: the voltmeter measures voltage. (a) True (b) False
29. 29.📏 How many ohms (Ω) is 7.8 kΩ?
30. 30.📏 How many kilo-ohms (kΩ) is 2100 Ω? =
31. 31.📏 How many amperes (A) is 2060 mA? =
32. 32.📏 How many ohms (Ω) is 9.2 kΩ?
33. 33.True or false: current is measured in watts (W). (a) False (b) True
34. 34.📏 In the water-pipe picture of a circuit, voltage is like … (a) the pipe colour (b) the tap handle (c) the water pressure (d) the water tank lid
35. 35.📏 How many milliamperes (mA) is 2.26 A?
36. 36.True or false: the ammeter measures voltage. (a) False (b) True
37. 37.📏 Which unit measures the push of a cell? (a) watt (W) (b) ampere (A) (c) ohm (Ω) (d) volt (V)
38. 38.True or false: the ammeter measures current. (a) False (b) True
39. 39.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
40. 40.📏 How many milliamperes (mA) make 1 ampere? (a) 10 (b) 1000 (c) 60 (d) 100

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