Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 138 · 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 of these is measured in volts (V)? (a) power (b) current (c) the flow of charge (d) voltage
2. 2.Which of these is measured in watts (W)? (a) voltage (b) the flow of charge (c) power (d) how much a part resists
3. 3.True or false: energy used each second is measured in amperes (A). (a) False (b) True
4. 4.📏 Which unit measures current? (a) volt (V) (b) ohm (Ω) (c) watt (W) (d) ampere (A)
5. 5.📏 Which unit measures voltage? (a) volt (V) (b) ampere (A) (c) watt (W) (d) ohm (Ω)
6. 6.📏 Which unit measures the push of a cell? (a) volt (V) (b) watt (W) (c) ampere (A) (d) ohm (Ω)
7. 7.📏 How many amperes (A) is 770 mA? =
8. 8.True or false: the push of a cell is measured in ohms (Ω). (a) True (b) False
9. 9.True or false: the ammeter measures voltage. (a) False (b) True
10. 10.True or false: the ammeter is joined across a part. (a) False (b) True
11. 11.📏 How many milliamperes (mA) is 2.53 A?
12. 12.📏 How many watts (W) is 2.8 kW?
13. 13.📏 How many kilo-ohms (kΩ) is 6400 Ω? =
14. 14.📏 How many amperes (A) is 810 mA? =
15. 15.📏 How many amperes (A) is 440 mA? =
16. 16.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 100 (b) 1000 (c) 1024 (d) 10
17. 17.Which of these is measured in watts (W)? (a) resistance (b) energy used each second (c) the push of a cell (d) how much a part resists
18. 18.📏 Which unit measures power? (a) ohm (Ω) (b) watt (W) (c) volt (V) (d) ampere (A)
19. 19.📏 How many watts (W) is 0.3 kW?
20. 20.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
21. 21.📏 How many amperes (A) is 1240 mA? =
22. 22.📏 How many amperes (A) is 1890 mA? =
23. 23.📏 In the water-pipe picture of a circuit, current is like … (a) the pipe colour (b) the water pressure (c) the flow of water (d) a narrow pipe
24. 24.📏 How many milliamperes (mA) is 0.68 A?
25. 25.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
26. 26.📏 How many kilowatts (kW) is 4200 W? =
27. 27.📏 Which unit measures the flow of charge? (a) ampere (A) (b) ohm (Ω) (c) watt (W) (d) volt (V)
28. 28.True or false: energy used each second is measured in volts (V). (a) True (b) False
29. 29.📏 How many milliamperes (mA) is 0.76 A?
30. 30.True or false: the voltmeter is joined in series. (a) False (b) True
31. 31.True or false: the voltmeter measures voltage. (a) True (b) False
32. 32.📏 How many amperes (A) is 2700 mA? =
33. 33.True or false: the ammeter is joined in series. (a) False (b) True
34. 34.Which of these is measured in ohms (Ω)? (a) power (b) how much a part resists (c) current (d) the flow of charge
35. 35.Which of these is measured in ohms (Ω)? (a) energy used each second (b) voltage (c) the push of a cell (d) resistance
36. 36.Which of these is measured in volts (V)? (a) how much a part resists (b) resistance (c) the flow of charge (d) the push of a cell
37. 37.True or false: the flow of charge is measured in amperes (A). (a) False (b) True
38. 38.True or false: the voltmeter measures current. (a) True (b) False
39. 39.True or false: voltage is measured in volts (V). (a) True (b) False
40. 40.📏 How many milliamperes (mA) is 1.78 A?

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