Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 409 · 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 2.57 A?
2. 2.📏 How many milliamperes (mA) is 1.41 A?
3. 3.📏 In the water-pipe picture of a circuit, current is like … (a) a narrow pipe (b) the flow of water (c) the pipe colour (d) the water pressure
4. 4.Which of these is measured in amperes (A)? (a) energy used each second (b) voltage (c) the push of a cell (d) current
5. 5.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 10 (b) 100 (c) 1024 (d) 1000
6. 6.True or false: the flow of charge is measured in amperes (A). (a) False (b) True
7. 7.📏 Which unit measures the flow of charge? (a) volt (V) (b) ampere (A) (c) watt (W) (d) ohm (Ω)
8. 8.True or false: the voltmeter is joined across a part. (a) False (b) True
9. 9.True or false: the ammeter measures voltage. (a) False (b) True
10. 10.📏 Which unit measures energy used each second? (a) watt (W) (b) volt (V) (c) ampere (A) (d) ohm (Ω)
11. 11.True or false: voltage is measured in ohms (Ω). (a) False (b) True
12. 12.📏 How many ohms (Ω) is 1.3 kΩ?
13. 13.📏 How many kilowatts (kW) is 4500 W? =
14. 14.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water tank lid (b) the water pressure (c) the pipe colour (d) the tap handle
15. 15.True or false: the push of a cell is measured in watts (W). (a) True (b) False
16. 16.Which of these is measured in ohms (Ω)? (a) the flow of charge (b) power (c) energy used each second (d) resistance
17. 17.📏 How many amperes (A) is 1080 mA? =
18. 18.📏 Which unit measures power? (a) watt (W) (b) ampere (A) (c) ohm (Ω) (d) volt (V)
19. 19.True or false: the voltmeter measures current. (a) True (b) False
20. 20.📏 How many watts (W) is 3.3 kW?
21. 21.📏 How many watts (W) is 4.2 kW?
22. 22.📏 How many milliamperes (mA) is 0.87 A?
23. 23.Which of these is measured in volts (V)? (a) energy used each second (b) power (c) current (d) the push of a cell
24. 24.True or false: the flow of charge is measured in ohms (Ω). (a) True (b) False
25. 25.📏 Which unit measures how much a part resists? (a) ohm (Ω) (b) watt (W) (c) volt (V) (d) ampere (A)
26. 26.📏 How many milliamperes (mA) is 0.21 A?
27. 27.📏 How many amperes (A) is 1880 mA? =
28. 28.True or false: resistance is measured in ohms (Ω). (a) False (b) True
29. 29.📏 How many milliamperes (mA) make 1 ampere? (a) 10 (b) 60 (c) 1000 (d) 100
30. 30.Which of these is measured in volts (V)? (a) current (b) resistance (c) voltage (d) how much a part resists
31. 31.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
32. 32.📏 How many kilo-ohms (kΩ) is 9000 Ω? =
33. 33.True or false: the ammeter is joined across a part. (a) True (b) False
34. 34.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
35. 35.📏 How many ohms (Ω) is 4.7 kΩ?
36. 36.📏 Which unit measures voltage? (a) watt (W) (b) ohm (Ω) (c) volt (V) (d) ampere (A)
37. 37.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
38. 38.📏 In the water-pipe picture of a circuit, resistance is like … (a) a narrow pipe (b) the flow of water (c) the water pressure (d) a bigger tank
39. 39.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
40. 40.📏 How many kilowatts (kW) is 4550 W? =

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