Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 576 · 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 1.21 A?
2. 2.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
3. 3.True or false: energy used each second is measured in watts (W). (a) False (b) True
4. 4.True or false: the voltmeter measures current. (a) True (b) False
5. 5.True or false: the voltmeter measures voltage. (a) True (b) False
6. 6.📏 Which unit measures resistance? (a) ampere (A) (b) volt (V) (c) ohm (Ω) (d) watt (W)
7. 7.📏 How many milliamperes (mA) is 0.1 A?
8. 8.True or false: the voltmeter is joined across a part. (a) False (b) True
9. 9.📏 Which unit measures how much a part resists? (a) volt (V) (b) ohm (Ω) (c) watt (W) (d) ampere (A)
10. 10.📏 How many milliamperes (mA) make 1 ampere? (a) 1000 (b) 10 (c) 60 (d) 100
11. 11.📏 In the water-pipe picture of a circuit, voltage is like … (a) the tap handle (b) the pipe colour (c) the water pressure (d) the water tank lid
12. 12.📏 Which unit measures current? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
13. 13.📏 In the water-pipe picture of a circuit, resistance is like … (a) a bigger tank (b) the water pressure (c) the flow of water (d) a narrow pipe
14. 14.Which of these is measured in ohms (Ω)? (a) current (b) resistance (c) voltage (d) energy used each second
15. 15.📏 Which unit measures energy used each second? (a) volt (V) (b) ampere (A) (c) watt (W) (d) ohm (Ω)
16. 16.📏 How many kilowatts (kW) is 950 W? =
17. 17.Which of these is measured in amperes (A)? (a) how much a part resists (b) energy used each second (c) the flow of charge (d) power
18. 18.Which of these is measured in watts (W)? (a) energy used each second (b) the flow of charge (c) the push of a cell (d) resistance
19. 19.Which of these is measured in amperes (A)? (a) the push of a cell (b) energy used each second (c) current (d) resistance
20. 20.True or false: the ammeter is joined in series. (a) True (b) False
21. 21.Which of these is measured in volts (V)? (a) power (b) how much a part resists (c) resistance (d) the push of a cell
22. 22.Which of these is measured in watts (W)? (a) current (b) voltage (c) the flow of charge (d) power
23. 23.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1000 (b) 1024 (c) 100 (d) 10
24. 24.📏 How many ohms (Ω) is 2.8 kΩ?
25. 25.📏 How many kilowatts (kW) is 300 W? =
26. 26.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
27. 27.True or false: the ammeter measures voltage. (a) True (b) False
28. 28.📏 How many amperes (A) is 2760 mA? =
29. 29.True or false: voltage is measured in watts (W). (a) False (b) True
30. 30.True or false: the ammeter measures current. (a) True (b) False
31. 31.📏 How many milliamperes (mA) is 0.51 A?
32. 32.📏 How many kilowatts (kW) is 800 W? =
33. 33.True or false: power is measured in amperes (A). (a) False (b) True
34. 34.📏 How many watts (W) is 0.2 kW?
35. 35.📏 How many ohms (Ω) is 6.3 kΩ?
36. 36.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
37. 37.📏 How many kilo-ohms (kΩ) is 700 Ω? =
38. 38.True or false: how much a part resists is measured in ohms (Ω). (a) False (b) True
39. 39.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
40. 40.True or false: current is measured in watts (W). (a) True (b) False

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