Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 638 · 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 ohms (Ω) is 9.9 kΩ?
2. 2.📏 Which unit measures power? (a) watt (W) (b) ohm (Ω) (c) ampere (A) (d) volt (V)
3. 3.📏 Which unit measures energy used each second? (a) ohm (Ω) (b) ampere (A) (c) watt (W) (d) volt (V)
4. 4.📏 How many kilo-ohms (kΩ) is 6800 Ω? =
5. 5.True or false: voltage is measured in ohms (Ω). (a) True (b) False
6. 6.📏 Which unit measures voltage? (a) watt (W) (b) ohm (Ω) (c) ampere (A) (d) volt (V)
7. 7.Which of these is measured in volts (V)? (a) current (b) the push of a cell (c) power (d) resistance
8. 8.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
9. 9.📏 How many kilo-ohms (kΩ) is 9400 Ω? =
10. 10.True or false: the ammeter measures current. (a) False (b) True
11. 11.True or false: how much a part resists is measured in ohms (Ω). (a) False (b) True
12. 12.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
13. 13.📏 Which unit measures current? (a) ohm (Ω) (b) volt (V) (c) watt (W) (d) ampere (A)
14. 14.📏 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
15. 15.True or false: the flow of charge is measured in amperes (A). (a) False (b) True
16. 16.True or false: the voltmeter is joined across a part. (a) False (b) True
17. 17.True or false: the ammeter measures voltage. (a) False (b) True
18. 18.True or false: the ammeter is joined in series. (a) False (b) True
19. 19.📏 How many amperes (A) is 2510 mA? =
20. 20.📏 How many milliamperes (mA) is 1.14 A?
21. 21.📏 Which unit measures how much a part resists? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
22. 22.Which of these is measured in amperes (A)? (a) voltage (b) the flow of charge (c) how much a part resists (d) energy used each second
23. 23.📏 How many amperes (A) is 850 mA? =
24. 24.True or false: the voltmeter measures voltage. (a) True (b) False
25. 25.Which of these is measured in ohms (Ω)? (a) power (b) energy used each second (c) the flow of charge (d) how much a part resists
26. 26.Which of these is measured in amperes (A)? (a) current (b) the push of a cell (c) energy used each second (d) resistance
27. 27.📏 How many amperes (A) is 20 mA? =
28. 28.📏 How many ohms (Ω) is 4.7 kΩ?
29. 29.Which of these is measured in watts (W)? (a) the push of a cell (b) the flow of charge (c) how much a part resists (d) power
30. 30.📏 How many amperes (A) is 1900 mA? =
31. 31.📏 How many kilo-ohms (kΩ) is 7500 Ω? =
32. 32.📏 How many milliamperes (mA) is 0.57 A?
33. 33.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1024 (b) 10 (c) 1000 (d) 100
34. 34.📏 In the water-pipe picture of a circuit, current is like … (a) the water pressure (b) a narrow pipe (c) the flow of water (d) the pipe colour
35. 35.📏 Which unit measures resistance? (a) watt (W) (b) volt (V) (c) ampere (A) (d) ohm (Ω)
36. 36.📏 How many watts (W) is 4.3 kW?
37. 37.📏 Which unit measures the flow of charge? (a) ohm (Ω) (b) ampere (A) (c) volt (V) (d) watt (W)
38. 38.📏 How many amperes (A) is 490 mA? =
39. 39.True or false: the voltmeter is joined in series. (a) True (b) False
40. 40.Which of these is measured in ohms (Ω)? (a) resistance (b) current (c) power (d) the push of a cell

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