Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 20 · 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.📏 Which unit measures energy used each second? (a) watt (W) (b) volt (V) (c) ampere (A) (d) ohm (Ω)
2. 2.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
3. 3.📏 Voltmeter or ammeter: which one is joined in series? (a) voltmeter (b) ammeter
4. 4.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1000 (b) 1024 (c) 10 (d) 100
5. 5.📏 How many milliamperes (mA) is 0.28 A?
6. 6.True or false: the ammeter measures current. (a) False (b) True
7. 7.True or false: power is measured in volts (V). (a) False (b) True
8. 8.True or false: voltage is measured in volts (V). (a) False (b) True
9. 9.📏 How many amperes (A) is 2270 mA? =
10. 10.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water tank lid (b) the tap handle (c) the pipe colour (d) the water pressure
11. 11.True or false: the voltmeter is joined across a part. (a) False (b) True
12. 12.📏 How many watts (W) is 4.3 kW?
13. 13.📏 Which unit measures resistance? (a) watt (W) (b) volt (V) (c) ampere (A) (d) ohm (Ω)
14. 14.Which of these is measured in ohms (Ω)? (a) the flow of charge (b) the push of a cell (c) current (d) how much a part resists
15. 15.📏 How many kilowatts (kW) is 3550 W? =
16. 16.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
17. 17.📏 Which unit measures the flow of charge? (a) ampere (A) (b) ohm (Ω) (c) volt (V) (d) watt (W)
18. 18.📏 Which unit measures how much a part resists? (a) ampere (A) (b) volt (V) (c) ohm (Ω) (d) watt (W)
19. 19.True or false: the ammeter measures voltage. (a) True (b) False
20. 20.Which of these is measured in volts (V)? (a) the flow of charge (b) power (c) voltage (d) how much a part resists
21. 21.Which of these is measured in amperes (A)? (a) energy used each second (b) the push of a cell (c) current (d) voltage
22. 22.True or false: the ammeter is joined in series. (a) True (b) False
23. 23.📏 How many milliamperes (mA) is 0.8 A?
24. 24.True or false: the voltmeter is joined in series. (a) True (b) False
25. 25.📏 How many milliamperes (mA) is 0.47 A?
26. 26.📏 Which unit measures voltage? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
27. 27.True or false: current is measured in watts (W). (a) True (b) False
28. 28.📏 In the water-pipe picture of a circuit, current is like … (a) the pipe colour (b) a narrow pipe (c) the flow of water (d) the water pressure
29. 29.True or false: the flow of charge is measured in volts (V). (a) True (b) False
30. 30.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
31. 31.True or false: how much a part resists is measured in volts (V). (a) False (b) True
32. 32.📏 How many watts (W) is 0.2 kW?
33. 33.📏 Which unit measures current? (a) watt (W) (b) ohm (Ω) (c) volt (V) (d) ampere (A)
34. 34.True or false: the ammeter is joined across a part. (a) False (b) True
35. 35.Which of these is measured in ohms (Ω)? (a) resistance (b) power (c) the push of a cell (d) the flow of charge
36. 36.True or false: the voltmeter measures current. (a) True (b) False
37. 37.📏 How many milliamperes (mA) is 0.75 A?
38. 38.True or false: the flow of charge is measured in amperes (A). (a) True (b) False
39. 39.True or false: the push of a cell is measured in volts (V). (a) False (b) True
40. 40.True or false: energy used each second is measured in volts (V). (a) True (b) False

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