Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 165 · 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, voltage is like … (a) the tap handle (b) the water tank lid (c) the pipe colour (d) the water pressure
2. 2.True or false: the flow of charge is measured in watts (W). (a) True (b) False
3. 3.📏 Which unit measures power? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
4. 4.📏 How many milliamperes (mA) is 3 A?
5. 5.📏 Which unit measures current? (a) watt (W) (b) volt (V) (c) ampere (A) (d) ohm (Ω)
6. 6.📏 How many amperes (A) is 140 mA? =
7. 7.📏 Which unit measures the flow of charge? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
8. 8.Which of these is measured in amperes (A)? (a) energy used each second (b) current (c) the push of a cell (d) how much a part resists
9. 9.Which of these is measured in volts (V)? (a) energy used each second (b) current (c) voltage (d) the flow of charge
10. 10.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
11. 11.📏 How many kilowatts (kW) is 3500 W? =
12. 12.📏 How many kilo-ohms (kΩ) is 9600 Ω? =
13. 13.📏 How many milliamperes (mA) is 2.63 A?
14. 14.📏 In the water-pipe picture of a circuit, current is like … (a) the water pressure (b) a narrow pipe (c) the pipe colour (d) the flow of water
15. 15.True or false: resistance is measured in watts (W). (a) True (b) False
16. 16.📏 Voltmeter or ammeter: which one is joined in series? (a) voltmeter (b) ammeter
17. 17.Which of these is measured in watts (W)? (a) resistance (b) how much a part resists (c) power (d) the push of a cell
18. 18.📏 How many milliamperes (mA) is 2.65 A?
19. 19.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 100 (b) 1024 (c) 10 (d) 1000
20. 20.True or false: energy used each second is measured in watts (W). (a) False (b) True
21. 21.📏 Which unit measures voltage? (a) watt (W) (b) ohm (Ω) (c) volt (V) (d) ampere (A)
22. 22.📏 How many kilowatts (kW) is 3800 W? =
23. 23.True or false: the ammeter is joined across a part. (a) True (b) False
24. 24.📏 How many milliamperes (mA) is 0.28 A?
25. 25.📏 How many kilo-ohms (kΩ) is 100 Ω? =
26. 26.True or false: the voltmeter measures current. (a) True (b) False
27. 27.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
28. 28.True or false: resistance is measured in amperes (A). (a) True (b) False
29. 29.📏 How many amperes (A) is 1690 mA? =
30. 30.📏 How many kilowatts (kW) is 900 W? =
31. 31.True or false: the ammeter is joined in series. (a) True (b) False
32. 32.📏 How many milliamperes (mA) is 2.43 A?
33. 33.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
34. 34.📏 In the water-pipe picture of a circuit, resistance is like … (a) a narrow pipe (b) a bigger tank (c) the flow of water (d) the water pressure
35. 35.True or false: current is measured in amperes (A). (a) False (b) True
36. 36.📏 How many milliamperes (mA) is 1.11 A?
37. 37.📏 How many ohms (Ω) is 0.4 kΩ?
38. 38.True or false: current is measured in watts (W). (a) False (b) True
39. 39.Which of these is measured in amperes (A)? (a) the flow of charge (b) voltage (c) resistance (d) the push of a cell
40. 40.Which of these is measured in watts (W)? (a) resistance (b) voltage (c) energy used each second (d) how much a part resists

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