Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 544 · 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.📏 In the water-pipe picture of a circuit, current is like … (a) the pipe colour (b) the water pressure (c) a narrow pipe (d) the flow of water
2. 2.Which of these is measured in watts (W)? (a) resistance (b) the flow of charge (c) current (d) power
3. 3.📏 How many watts (W) is 2.5 kW?
4. 4.True or false: the ammeter is joined across a part. (a) True (b) False
5. 5.True or false: the ammeter measures voltage. (a) False (b) True
6. 6.True or false: the push of a cell is measured in amperes (A). (a) True (b) False
7. 7.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
8. 8.📏 Which unit measures current? (a) ampere (A) (b) ohm (Ω) (c) volt (V) (d) watt (W)
9. 9.True or false: voltage is measured in amperes (A). (a) False (b) True
10. 10.True or false: the voltmeter is joined in series. (a) False (b) True
11. 11.📏 How many kilo-ohms (kΩ) is 8500 Ω? =
12. 12.True or false: current is measured in amperes (A). (a) False (b) True
13. 13.📏 How many watts (W) is 1 kW?
14. 14.True or false: the voltmeter measures voltage. (a) False (b) True
15. 15.Which of these is measured in watts (W)? (a) energy used each second (b) resistance (c) current (d) how much a part resists
16. 16.True or false: the ammeter is joined in series. (a) False (b) True
17. 17.Which of these is measured in volts (V)? (a) how much a part resists (b) the flow of charge (c) the push of a cell (d) resistance
18. 18.📏 How many milliamperes (mA) is 1.4 A?
19. 19.True or false: the voltmeter is joined across a part. (a) True (b) False
20. 20.True or false: the flow of charge is measured in amperes (A). (a) True (b) False
21. 21.📏 Which unit measures voltage? (a) ohm (Ω) (b) volt (V) (c) watt (W) (d) ampere (A)
22. 22.📏 How many ohms (Ω) is 2.9 kΩ?
23. 23.Which of these is measured in volts (V)? (a) current (b) power (c) voltage (d) the flow of charge
24. 24.📏 How many milliamperes (mA) is 1.87 A?
25. 25.True or false: the flow of charge is measured in watts (W). (a) True (b) False
26. 26.📏 How many watts (W) is 1.3 kW?
27. 27.Which of these is measured in amperes (A)? (a) current (b) the push of a cell (c) how much a part resists (d) resistance
28. 28.Which of these is measured in ohms (Ω)? (a) voltage (b) current (c) power (d) how much a part resists
29. 29.📏 How many milliamperes (mA) is 0.43 A?
30. 30.True or false: the ammeter measures current. (a) False (b) True
31. 31.📏 Which unit measures how much a part resists? (a) ohm (Ω) (b) ampere (A) (c) volt (V) (d) watt (W)
32. 32.True or false: power is measured in volts (V). (a) True (b) False
33. 33.📏 How many amperes (A) is 1540 mA? =
34. 34.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
35. 35.📏 How many milliamperes (mA) make 1 ampere? (a) 1000 (b) 100 (c) 60 (d) 10
36. 36.📏 Voltmeter or ammeter: which one is joined in series? (a) voltmeter (b) ammeter
37. 37.📏 How many kilowatts (kW) is 4550 W? =
38. 38.📏 How many milliamperes (mA) is 0.03 A?
39. 39.📏 Which unit measures energy used each second? (a) ohm (Ω) (b) watt (W) (c) volt (V) (d) ampere (A)
40. 40.📏 How many watts (W) is 2.1 kW?

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