Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 642 · 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.True or false: current is measured in watts (W). (a) True (b) False
2. 2.📏 How many watts (W) is 0.1 kW?
3. 3.📏 How many milliamperes (mA) is 0.25 A?
4. 4.📏 Which unit measures energy used each second? (a) volt (V) (b) ampere (A) (c) ohm (Ω) (d) watt (W)
5. 5.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water tank lid (b) the pipe colour (c) the tap handle (d) the water pressure
6. 6.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
7. 7.📏 Which unit measures resistance? (a) ohm (Ω) (b) ampere (A) (c) watt (W) (d) volt (V)
8. 8.📏 Which unit measures voltage? (a) volt (V) (b) ohm (Ω) (c) ampere (A) (d) watt (W)
9. 9.True or false: energy used each second is measured in amperes (A). (a) False (b) True
10. 10.True or false: the voltmeter is joined in series. (a) True (b) False
11. 11.Which of these is measured in watts (W)? (a) resistance (b) current (c) the push of a cell (d) power
12. 12.📏 How many milliamperes (mA) make 1 ampere? (a) 1000 (b) 10 (c) 60 (d) 100
13. 13.📏 How many kilowatts (kW) is 1700 W? =
14. 14.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
15. 15.True or false: the ammeter is joined in series. (a) False (b) True
16. 16.True or false: voltage is measured in amperes (A). (a) False (b) True
17. 17.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
18. 18.📏 How many milliamperes (mA) is 1.03 A?
19. 19.📏 How many kilo-ohms (kΩ) is 7700 Ω? =
20. 20.📏 In the water-pipe picture of a circuit, current is like … (a) the water pressure (b) a narrow pipe (c) the pipe colour (d) the flow of water
21. 21.📏 How many kilo-ohms (kΩ) is 8700 Ω? =
22. 22.📏 How many ohms (Ω) is 3.7 kΩ?
23. 23.True or false: power is measured in ohms (Ω). (a) True (b) False
24. 24.Which of these is measured in amperes (A)? (a) the push of a cell (b) energy used each second (c) the flow of charge (d) voltage
25. 25.True or false: the flow of charge is measured in watts (W). (a) True (b) False
26. 26.True or false: resistance is measured in watts (W). (a) False (b) True
27. 27.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
28. 28.📏 Which unit measures the flow of charge? (a) watt (W) (b) volt (V) (c) ampere (A) (d) ohm (Ω)
29. 29.📏 How many milliamperes (mA) is 0.27 A?
30. 30.📏 In the water-pipe picture of a circuit, resistance is like … (a) the flow of water (b) a bigger tank (c) a narrow pipe (d) the water pressure
31. 31.True or false: energy used each second is measured in watts (W). (a) False (b) True
32. 32.📏 How many amperes (A) is 390 mA? =
33. 33.True or false: voltage is measured in watts (W). (a) True (b) False
34. 34.📏 How many watts (W) is 1.5 kW?
35. 35.📏 How many kilo-ohms (kΩ) is 7800 Ω? =
36. 36.📏 How many kilo-ohms (kΩ) is 5100 Ω? =
37. 37.📏 How many amperes (A) is 1330 mA? =
38. 38.Which of these is measured in volts (V)? (a) the push of a cell (b) power (c) the flow of charge (d) how much a part resists
39. 39.📏 How many ohms (Ω) is 7.2 kΩ?
40. 40.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1024 (b) 100 (c) 1000 (d) 10

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