Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 845 · 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 current? (a) volt (V) (b) ohm (Ω) (c) watt (W) (d) ampere (A)
2. 2.📏 How many amperes (A) is 2810 mA? =
3. 3.📏 In the water-pipe picture of a circuit, resistance is like … (a) the flow of water (b) a bigger tank (c) the water pressure (d) a narrow pipe
4. 4.True or false: the voltmeter measures voltage. (a) True (b) False
5. 5.Which of these is measured in amperes (A)? (a) resistance (b) the push of a cell (c) voltage (d) current
6. 6.Which of these is measured in ohms (Ω)? (a) resistance (b) the push of a cell (c) energy used each second (d) current
7. 7.True or false: the voltmeter measures current. (a) False (b) True
8. 8.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 10 (b) 1000 (c) 100 (d) 1024
9. 9.📏 Which unit measures energy used each second? (a) watt (W) (b) volt (V) (c) ohm (Ω) (d) ampere (A)
10. 10.True or false: the ammeter measures voltage. (a) True (b) False
11. 11.📏 Which unit measures voltage? (a) volt (V) (b) watt (W) (c) ampere (A) (d) ohm (Ω)
12. 12.📏 How many milliamperes (mA) is 0.33 A?
13. 13.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water pressure (b) the water tank lid (c) the tap handle (d) the pipe colour
14. 14.Which of these is measured in volts (V)? (a) the flow of charge (b) current (c) the push of a cell (d) how much a part resists
15. 15.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
16. 16.True or false: the voltmeter is joined across a part. (a) False (b) True
17. 17.True or false: how much a part resists is measured in volts (V). (a) True (b) False
18. 18.📏 How many kilowatts (kW) is 4800 W? =
19. 19.📏 Which unit measures resistance? (a) ampere (A) (b) volt (V) (c) watt (W) (d) ohm (Ω)
20. 20.📏 In the water-pipe picture of a circuit, current is like … (a) a narrow pipe (b) the pipe colour (c) the water pressure (d) the flow of water
21. 21.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
22. 22.📏 Voltmeter or ammeter: which one is joined in series? (a) voltmeter (b) ammeter
23. 23.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
24. 24.Which of these is measured in watts (W)? (a) the flow of charge (b) resistance (c) power (d) voltage
25. 25.True or false: the flow of charge is measured in watts (W). (a) True (b) False
26. 26.📏 How many milliamperes (mA) make 1 ampere? (a) 60 (b) 100 (c) 1000 (d) 10
27. 27.📏 How many amperes (A) is 2330 mA? =
28. 28.True or false: resistance is measured in watts (W). (a) True (b) False
29. 29.📏 How many watts (W) is 2.4 kW?
30. 30.📏 Which unit measures the flow of charge? (a) watt (W) (b) volt (V) (c) ampere (A) (d) ohm (Ω)
31. 31.Which of these is measured in volts (V)? (a) power (b) how much a part resists (c) voltage (d) energy used each second
32. 32.📏 How many amperes (A) is 2780 mA? =
33. 33.📏 How many kilowatts (kW) is 2800 W? =
34. 34.📏 How many amperes (A) is 2120 mA? =
35. 35.True or false: the ammeter measures current. (a) False (b) True
36. 36.Which of these is measured in ohms (Ω)? (a) current (b) the push of a cell (c) power (d) how much a part resists
37. 37.True or false: energy used each second is measured in volts (V). (a) True (b) False
38. 38.True or false: the push of a cell is measured in watts (W). (a) False (b) True
39. 39.📏 How many ohms (Ω) is 3.8 kΩ?
40. 40.True or false: the flow of charge is measured in amperes (A). (a) False (b) True

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