Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 308 · 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 milliamperes (mA) is 1.05 A?
2. 2.True or false: the flow of charge is measured in amperes (A). (a) False (b) True
3. 3.📏 How many milliamperes (mA) is 0.3 A?
4. 4.Which of these is measured in ohms (Ω)? (a) resistance (b) current (c) the flow of charge (d) the push of a cell
5. 5.📏 Which unit measures voltage? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
6. 6.True or false: resistance is measured in volts (V). (a) True (b) False
7. 7.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
8. 8.True or false: the ammeter measures current. (a) False (b) True
9. 9.📏 How many amperes (A) is 710 mA? =
10. 10.True or false: the ammeter measures voltage. (a) True (b) False
11. 11.Which of these is measured in amperes (A)? (a) voltage (b) energy used each second (c) the flow of charge (d) resistance
12. 12.📏 Which unit measures power? (a) ampere (A) (b) volt (V) (c) ohm (Ω) (d) watt (W)
13. 13.📏 How many kilo-ohms (kΩ) is 6500 Ω? =
14. 14.True or false: the push of a cell is measured in volts (V). (a) False (b) True
15. 15.📏 How many amperes (A) is 510 mA? =
16. 16.📏 How many milliamperes (mA) is 2.04 A?
17. 17.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
18. 18.True or false: the voltmeter is joined in series. (a) False (b) True
19. 19.📏 How many amperes (A) is 490 mA? =
20. 20.True or false: the voltmeter is joined across a part. (a) False (b) True
21. 21.Which of these is measured in volts (V)? (a) current (b) the flow of charge (c) the push of a cell (d) resistance
22. 22.📏 How many kilowatts (kW) is 100 W? =
23. 23.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 10 (b) 100 (c) 1000 (d) 1024
24. 24.📏 How many watts (W) is 1.1 kW?
25. 25.📏 Which unit measures resistance? (a) ohm (Ω) (b) watt (W) (c) volt (V) (d) ampere (A)
26. 26.📏 How many kilo-ohms (kΩ) is 9700 Ω? =
27. 27.True or false: voltage is measured in volts (V). (a) True (b) False
28. 28.Which of these is measured in amperes (A)? (a) voltage (b) resistance (c) current (d) how much a part resists
29. 29.📏 In the water-pipe picture of a circuit, resistance is like … (a) the flow of water (b) the water pressure (c) a bigger tank (d) a narrow pipe
30. 30.📏 How many ohms (Ω) is 1.5 kΩ?
31. 31.📏 How many kilowatts (kW) is 3550 W? =
32. 32.📏 How many milliamperes (mA) make 1 ampere? (a) 10 (b) 1000 (c) 60 (d) 100
33. 33.📏 How many ohms (Ω) is 9.6 kΩ?
34. 34.True or false: the voltmeter measures current. (a) False (b) True
35. 35.True or false: the ammeter is joined across a part. (a) True (b) False
36. 36.True or false: current is measured in amperes (A). (a) False (b) True
37. 37.📏 Which unit measures current? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
38. 38.📏 How many kilowatts (kW) is 1150 W? =
39. 39.📏 How many milliamperes (mA) is 1.9 A?
40. 40.📏 In the water-pipe picture of a circuit, current is like … (a) the flow of water (b) the pipe colour (c) a narrow pipe (d) the water pressure

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