Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 243 · 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 the flow of charge? (a) ampere (A) (b) volt (V) (c) ohm (Ω) (d) watt (W)
2. 2.📏 Voltmeter or ammeter: which one is joined in series? (a) voltmeter (b) ammeter
3. 3.📏 Which unit measures resistance? (a) volt (V) (b) ampere (A) (c) ohm (Ω) (d) watt (W)
4. 4.📏 How many milliamperes (mA) is 1.55 A?
5. 5.True or false: the voltmeter measures voltage. (a) True (b) False
6. 6.True or false: the voltmeter is joined across a part. (a) False (b) True
7. 7.📏 In the water-pipe picture of a circuit, resistance is like … (a) the water pressure (b) a bigger tank (c) a narrow pipe (d) the flow of water
8. 8.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
9. 9.📏 How many amperes (A) is 2890 mA? =
10. 10.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1024 (b) 100 (c) 1000 (d) 10
11. 11.True or false: current is measured in amperes (A). (a) False (b) True
12. 12.True or false: the voltmeter is joined in series. (a) False (b) True
13. 13.True or false: the ammeter is joined across a part. (a) True (b) False
14. 14.📏 How many watts (W) is 3.1 kW?
15. 15.Which of these is measured in watts (W)? (a) current (b) voltage (c) energy used each second (d) how much a part resists
16. 16.📏 How many milliamperes (mA) is 1.6 A?
17. 17.True or false: the voltmeter measures current. (a) False (b) True
18. 18.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
19. 19.Which of these is measured in amperes (A)? (a) voltage (b) current (c) how much a part resists (d) power
20. 20.📏 How many milliamperes (mA) is 0.99 A?
21. 21.Which of these is measured in volts (V)? (a) current (b) voltage (c) energy used each second (d) the flow of charge
22. 22.Which of these is measured in ohms (Ω)? (a) voltage (b) how much a part resists (c) the push of a cell (d) the flow of charge
23. 23.True or false: the ammeter measures voltage. (a) True (b) False
24. 24.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
25. 25.True or false: energy used each second is measured in watts (W). (a) False (b) True
26. 26.📏 How many amperes (A) is 920 mA? =
27. 27.True or false: the flow of charge is measured in amperes (A). (a) False (b) True
28. 28.True or false: resistance is measured in volts (V). (a) True (b) False
29. 29.📏 How many amperes (A) is 2290 mA? =
30. 30.📏 How many kilo-ohms (kΩ) is 6200 Ω? =
31. 31.📏 How many amperes (A) is 1730 mA? =
32. 32.True or false: power is measured in watts (W). (a) False (b) True
33. 33.Which of these is measured in watts (W)? (a) how much a part resists (b) power (c) resistance (d) current
34. 34.📏 How many amperes (A) is 1410 mA? =
35. 35.True or false: energy used each second is measured in amperes (A). (a) True (b) False
36. 36.Which of these is measured in volts (V)? (a) the push of a cell (b) current (c) the flow of charge (d) energy used each second
37. 37.📏 Which unit measures energy used each second? (a) ohm (Ω) (b) ampere (A) (c) volt (V) (d) watt (W)
38. 38.📏 In the water-pipe picture of a circuit, voltage is like … (a) the tap handle (b) the water tank lid (c) the water pressure (d) the pipe colour
39. 39.True or false: resistance is measured in watts (W). (a) True (b) False
40. 40.📏 Which unit measures current? (a) ohm (Ω) (b) volt (V) (c) watt (W) (d) ampere (A)

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