Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 77 · 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.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
2. 2.Which of these is measured in ohms (Ω)? (a) the flow of charge (b) how much a part resists (c) voltage (d) power
3. 3.True or false: the voltmeter is joined in series. (a) False (b) True
4. 4.True or false: the push of a cell is measured in watts (W). (a) True (b) False
5. 5.📏 How many amperes (A) is 2020 mA? =
6. 6.True or false: the voltmeter measures voltage. (a) True (b) False
7. 7.Which of these is measured in amperes (A)? (a) voltage (b) the push of a cell (c) current (d) power
8. 8.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
9. 9.True or false: the voltmeter measures current. (a) True (b) False
10. 10.True or false: resistance is measured in volts (V). (a) True (b) False
11. 11.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water pressure (b) the water tank lid (c) the tap handle (d) the pipe colour
12. 12.📏 How many ohms (Ω) is 7.4 kΩ?
13. 13.True or false: the flow of charge is measured in volts (V). (a) True (b) False
14. 14.📏 How many watts (W) is 1 kW?
15. 15.True or false: the ammeter measures current. (a) True (b) False
16. 16.📏 How many milliamperes (mA) is 0.14 A?
17. 17.Which of these is measured in ohms (Ω)? (a) resistance (b) power (c) voltage (d) the push of a cell
18. 18.True or false: the ammeter is joined across a part. (a) False (b) True
19. 19.📏 In the water-pipe picture of a circuit, resistance is like … (a) the water pressure (b) the flow of water (c) a narrow pipe (d) a bigger tank
20. 20.📏 How many milliamperes (mA) is 2.84 A?
21. 21.True or false: voltage is measured in volts (V). (a) True (b) False
22. 22.📏 Which unit measures energy used each second? (a) ampere (A) (b) volt (V) (c) ohm (Ω) (d) watt (W)
23. 23.📏 In the water-pipe picture of a circuit, current is like … (a) a narrow pipe (b) the pipe colour (c) the water pressure (d) the flow of water
24. 24.True or false: power is measured in amperes (A). (a) True (b) False
25. 25.True or false: the voltmeter is joined across a part. (a) True (b) False
26. 26.📏 Which unit measures current? (a) watt (W) (b) ampere (A) (c) volt (V) (d) ohm (Ω)
27. 27.📏 How many watts (W) is 4.6 kW?
28. 28.📏 How many kilo-ohms (kΩ) is 2500 Ω? =
29. 29.📏 Which unit measures the flow of charge? (a) volt (V) (b) ohm (Ω) (c) ampere (A) (d) watt (W)
30. 30.📏 How many amperes (A) is 1890 mA? =
31. 31.📏 Which unit measures resistance? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
32. 32.Which of these is measured in watts (W)? (a) resistance (b) the flow of charge (c) how much a part resists (d) energy used each second
33. 33.True or false: the ammeter measures voltage. (a) True (b) False
34. 34.📏 How many ohms (Ω) is 2.2 kΩ?
35. 35.True or false: current is measured in ohms (Ω). (a) True (b) False
36. 36.📏 How many milliamperes (mA) is 2.8 A?
37. 37.📏 How many amperes (A) is 2860 mA? =
38. 38.📏 How many milliamperes (mA) is 1.02 A?
39. 39.📏 How many amperes (A) is 210 mA? =
40. 40.📏 How many amperes (A) is 1590 mA? =

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