Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 29 · 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) make 1 ampere? (a) 60 (b) 1000 (c) 10 (d) 100
2. 2.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
3. 3.Which of these is measured in volts (V)? (a) how much a part resists (b) the push of a cell (c) current (d) resistance
4. 4.Which of these is measured in ohms (Ω)? (a) the push of a cell (b) power (c) how much a part resists (d) the flow of charge
5. 5.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 100 (b) 10 (c) 1024 (d) 1000
6. 6.True or false: current is measured in volts (V). (a) False (b) True
7. 7.True or false: current is measured in watts (W). (a) True (b) False
8. 8.📏 How many amperes (A) is 1280 mA? =
9. 9.True or false: power is measured in amperes (A). (a) True (b) False
10. 10.📏 Which unit measures energy used each second? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
11. 11.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
12. 12.True or false: the ammeter is joined across a part. (a) True (b) False
13. 13.📏 Which unit measures the push of a cell? (a) watt (W) (b) ohm (Ω) (c) volt (V) (d) ampere (A)
14. 14.📏 How many amperes (A) is 2460 mA? =
15. 15.Which of these is measured in amperes (A)? (a) current (b) how much a part resists (c) energy used each second (d) the push of a cell
16. 16.True or false: energy used each second is measured in watts (W). (a) True (b) False
17. 17.📏 How many milliamperes (mA) is 2.54 A?
18. 18.📏 How many ohms (Ω) is 7 kΩ?
19. 19.📏 How many kilowatts (kW) is 2900 W? =
20. 20.True or false: current is measured in amperes (A). (a) False (b) True
21. 21.📏 Which unit measures resistance? (a) ohm (Ω) (b) ampere (A) (c) volt (V) (d) watt (W)
22. 22.📏 How many milliamperes (mA) is 2.89 A?
23. 23.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
24. 24.📏 How many kilowatts (kW) is 1400 W? =
25. 25.True or false: voltage is measured in volts (V). (a) True (b) False
26. 26.True or false: resistance is measured in volts (V). (a) False (b) True
27. 27.📏 How many kilo-ohms (kΩ) is 300 Ω? =
28. 28.Which of these is measured in watts (W)? (a) current (b) voltage (c) how much a part resists (d) power
29. 29.📏 Which unit measures power? (a) volt (V) (b) ohm (Ω) (c) ampere (A) (d) watt (W)
30. 30.📏 In the water-pipe picture of a circuit, current is like … (a) the flow of water (b) a narrow pipe (c) the pipe colour (d) the water pressure
31. 31.True or false: the ammeter measures current. (a) False (b) True
32. 32.📏 Which unit measures how much a part resists? (a) volt (V) (b) watt (W) (c) ohm (Ω) (d) ampere (A)
33. 33.📏 How many amperes (A) is 1920 mA? =
34. 34.📏 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
35. 35.📏 How many ohms (Ω) is 0.9 kΩ?
36. 36.True or false: the ammeter is joined in series. (a) False (b) True
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.Which of these is measured in watts (W)? (a) the push of a cell (b) current (c) the flow of charge (d) energy used each second
39. 39.True or false: energy used each second is measured in volts (V). (a) False (b) True
40. 40.True or false: resistance is measured in ohms (Ω). (a) True (b) False

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