Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 727 · 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 energy used each second? (a) volt (V) (b) watt (W) (c) ampere (A) (d) ohm (Ω)
2. 2.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water tank lid (b) the tap handle (c) the water pressure (d) the pipe colour
3. 3.True or false: the flow of charge is measured in amperes (A). (a) True (b) False
4. 4.📏 How many amperes (A) is 330 mA? =
5. 5.📏 In the water-pipe picture of a circuit, current is like … (a) a narrow pipe (b) the pipe colour (c) the flow of water (d) the water pressure
6. 6.📏 Which unit measures how much a part resists? (a) watt (W) (b) ohm (Ω) (c) ampere (A) (d) volt (V)
7. 7.📏 Which unit measures resistance? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
8. 8.📏 How many watts (W) is 4.3 kW?
9. 9.📏 How many milliamperes (mA) is 2.81 A?
10. 10.📏 How many watts (W) is 0.5 kW?
11. 11.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 10 (b) 1024 (c) 100 (d) 1000
12. 12.True or false: the voltmeter measures voltage. (a) True (b) False
13. 13.📏 How many ohms (Ω) is 2.3 kΩ?
14. 14.Which of these is measured in watts (W)? (a) how much a part resists (b) resistance (c) power (d) voltage
15. 15.Which of these is measured in volts (V)? (a) power (b) how much a part resists (c) resistance (d) the push of a cell
16. 16.📏 How many ohms (Ω) is 3.2 kΩ?
17. 17.True or false: current is measured in amperes (A). (a) False (b) True
18. 18.📏 Which unit measures power? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
19. 19.📏 How many milliamperes (mA) is 1.28 A?
20. 20.📏 How many kilo-ohms (kΩ) is 5900 Ω? =
21. 21.📏 How many kilo-ohms (kΩ) is 2000 Ω? =
22. 22.📏 How many amperes (A) is 2170 mA? =
23. 23.True or false: the voltmeter is joined across a part. (a) False (b) True
24. 24.📏 Which unit measures voltage? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
25. 25.Which of these is measured in ohms (Ω)? (a) current (b) energy used each second (c) the flow of charge (d) how much a part resists
26. 26.True or false: resistance is measured in watts (W). (a) False (b) True
27. 27.📏 How many kilowatts (kW) is 2600 W? =
28. 28.True or false: the ammeter measures voltage. (a) True (b) False
29. 29.📏 How many milliamperes (mA) is 0.71 A?
30. 30.📏 How many milliamperes (mA) is 0.43 A?
31. 31.📏 How many ohms (Ω) is 4.5 kΩ?
32. 32.True or false: energy used each second is measured in ohms (Ω). (a) True (b) False
33. 33.📏 How many milliamperes (mA) is 1.03 A?
34. 34.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
35. 35.📏 How many kilowatts (kW) is 2400 W? =
36. 36.Which of these is measured in ohms (Ω)? (a) voltage (b) energy used each second (c) current (d) resistance
37. 37.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
38. 38.📏 How many milliamperes (mA) is 1.98 A?
39. 39.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
40. 40.True or false: the push of a cell is measured in volts (V). (a) True (b) False

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