Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 953 · 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 0.27 A?
2. 2.📏 Which unit measures the push of a cell? (a) volt (V) (b) ohm (Ω) (c) ampere (A) (d) watt (W)
3. 3.True or false: current is measured in watts (W). (a) True (b) False
4. 4.True or false: power is measured in watts (W). (a) True (b) False
5. 5.True or false: the voltmeter is joined across a part. (a) False (b) True
6. 6.Which of these is measured in ohms (Ω)? (a) voltage (b) power (c) current (d) how much a part resists
7. 7.True or false: the voltmeter measures current. (a) False (b) True
8. 8.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1024 (b) 10 (c) 1000 (d) 100
9. 9.True or false: voltage is measured in volts (V). (a) False (b) True
10. 10.📏 How many milliamperes (mA) is 1.39 A?
11. 11.True or false: resistance is measured in watts (W). (a) False (b) True
12. 12.True or false: current is measured in amperes (A). (a) False (b) True
13. 13.Which of these is measured in amperes (A)? (a) resistance (b) the push of a cell (c) the flow of charge (d) voltage
14. 14.📏 In the water-pipe picture of a circuit, voltage is like … (a) the pipe colour (b) the water tank lid (c) the water pressure (d) the tap handle
15. 15.True or false: the ammeter measures voltage. (a) False (b) True
16. 16.Which of these is measured in ohms (Ω)? (a) current (b) resistance (c) the push of a cell (d) voltage
17. 17.📏 Which unit measures energy used each second? (a) ampere (A) (b) volt (V) (c) ohm (Ω) (d) watt (W)
18. 18.📏 Which unit measures voltage? (a) watt (W) (b) ampere (A) (c) volt (V) (d) ohm (Ω)
19. 19.📏 How many ohms (Ω) is 7.3 kΩ?
20. 20.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
21. 21.📏 Which unit measures power? (a) volt (V) (b) watt (W) (c) ampere (A) (d) ohm (Ω)
22. 22.📏 How many kilo-ohms (kΩ) is 7400 Ω? =
23. 23.📏 How many kilo-ohms (kΩ) is 3900 Ω? =
24. 24.📏 How many amperes (A) is 2970 mA? =
25. 25.📏 How many amperes (A) is 250 mA? =
26. 26.📏 How many watts (W) is 4.8 kW?
27. 27.True or false: power is measured in volts (V). (a) False (b) True
28. 28.📏 How many ohms (Ω) is 10 kΩ?
29. 29.📏 Which unit measures the flow of charge? (a) ohm (Ω) (b) volt (V) (c) ampere (A) (d) watt (W)
30. 30.Which of these is measured in amperes (A)? (a) how much a part resists (b) power (c) voltage (d) current
31. 31.📏 How many milliamperes (mA) make 1 ampere? (a) 10 (b) 60 (c) 100 (d) 1000
32. 32.📏 How many kilowatts (kW) is 3850 W? =
33. 33.True or false: voltage is measured in watts (W). (a) True (b) False
34. 34.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
35. 35.📏 How many milliamperes (mA) is 1.57 A?
36. 36.True or false: the flow of charge is measured in amperes (A). (a) True (b) False
37. 37.📏 In the water-pipe picture of a circuit, resistance is like … (a) the water pressure (b) a narrow pipe (c) the flow of water (d) a bigger tank
38. 38.📏 How many amperes (A) is 1860 mA? =
39. 39.📏 How many ohms (Ω) is 4.7 kΩ?
40. 40.📏 How many watts (W) is 1 kW?

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