Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 998 · 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 resistance? (a) ampere (A) (b) volt (V) (c) ohm (Ω) (d) watt (W)
2. 2.📏 Which unit measures current? (a) ampere (A) (b) ohm (Ω) (c) watt (W) (d) volt (V)
3. 3.True or false: the voltmeter is joined across a part. (a) False (b) True
4. 4.📏 How many amperes (A) is 2130 mA? =
5. 5.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 10 (b) 1024 (c) 1000 (d) 100
6. 6.Which of these is measured in ohms (Ω)? (a) energy used each second (b) voltage (c) the push of a cell (d) resistance
7. 7.📏 In the water-pipe picture of a circuit, voltage is like … (a) the tap handle (b) the water pressure (c) the pipe colour (d) the water tank lid
8. 8.True or false: the ammeter is joined across a part. (a) False (b) True
9. 9.📏 How many watts (W) is 3 kW?
10. 10.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
11. 11.📏 How many amperes (A) is 2160 mA? =
12. 12.True or false: the voltmeter measures voltage. (a) False (b) True
13. 13.True or false: voltage is measured in volts (V). (a) True (b) False
14. 14.True or false: resistance is measured in ohms (Ω). (a) True (b) False
15. 15.📏 Which unit measures how much a part resists? (a) volt (V) (b) ampere (A) (c) ohm (Ω) (d) watt (W)
16. 16.True or false: voltage is measured in ohms (Ω). (a) False (b) True
17. 17.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
18. 18.True or false: resistance is measured in amperes (A). (a) False (b) True
19. 19.True or false: energy used each second is measured in watts (W). (a) False (b) True
20. 20.📏 Which unit measures energy used each second? (a) ampere (A) (b) volt (V) (c) watt (W) (d) ohm (Ω)
21. 21.📏 How many milliamperes (mA) is 1.81 A?
22. 22.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
23. 23.📏 Which unit measures the push of a cell? (a) watt (W) (b) volt (V) (c) ohm (Ω) (d) ampere (A)
24. 24.📏 How many milliamperes (mA) is 0.7 A?
25. 25.Which of these is measured in volts (V)? (a) how much a part resists (b) current (c) the flow of charge (d) voltage
26. 26.📏 How many amperes (A) is 30 mA? =
27. 27.Which of these is measured in amperes (A)? (a) energy used each second (b) current (c) power (d) resistance
28. 28.True or false: the voltmeter is joined in series. (a) True (b) False
29. 29.📏 How many ohms (Ω) is 8.6 kΩ?
30. 30.📏 How many kilowatts (kW) is 4250 W? =
31. 31.📏 How many milliamperes (mA) make 1 ampere? (a) 10 (b) 60 (c) 100 (d) 1000
32. 32.📏 In the water-pipe picture of a circuit, resistance is like … (a) the water pressure (b) the flow of water (c) a bigger tank (d) a narrow pipe
33. 33.📏 How many ohms (Ω) is 1.3 kΩ?
34. 34.📏 How many milliamperes (mA) is 2.15 A?
35. 35.📏 How many milliamperes (mA) is 0.65 A?
36. 36.📏 Which unit measures voltage? (a) ohm (Ω) (b) watt (W) (c) volt (V) (d) ampere (A)
37. 37.📏 How many watts (W) is 0.6 kW?
38. 38.True or false: how much a part resists is measured in ohms (Ω). (a) True (b) False
39. 39.True or false: the ammeter measures current. (a) True (b) False
40. 40.📏 How many watts (W) is 3.1 kW?

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