Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 946 · 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.True or false: power is measured in watts (W). (a) False (b) True
3. 3.📏 Which unit measures current? (a) volt (V) (b) watt (W) (c) ohm (Ω) (d) ampere (A)
4. 4.📏 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
5. 5.📏 Which unit measures voltage? (a) ohm (Ω) (b) watt (W) (c) volt (V) (d) ampere (A)
6. 6.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
7. 7.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
8. 8.📏 How many amperes (A) is 2920 mA? =
9. 9.📏 How many amperes (A) is 1980 mA? =
10. 10.📏 How many watts (W) is 2 kW?
11. 11.📏 How many kilo-ohms (kΩ) is 8800 Ω? =
12. 12.📏 How many milliamperes (mA) make 1 ampere? (a) 60 (b) 100 (c) 10 (d) 1000
13. 13.📏 How many milliamperes (mA) is 2.81 A?
14. 14.True or false: the ammeter is joined in series. (a) False (b) True
15. 15.True or false: power is measured in volts (V). (a) False (b) True
16. 16.📏 Which unit measures the push of a cell? (a) watt (W) (b) volt (V) (c) ampere (A) (d) ohm (Ω)
17. 17.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
18. 18.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
19. 19.Which of these is measured in watts (W)? (a) current (b) how much a part resists (c) energy used each second (d) the push of a cell
20. 20.Which of these is measured in watts (W)? (a) the flow of charge (b) current (c) power (d) voltage
21. 21.Which of these is measured in ohms (Ω)? (a) the push of a cell (b) how much a part resists (c) power (d) voltage
22. 22.Which of these is measured in amperes (A)? (a) the push of a cell (b) power (c) voltage (d) the flow of charge
23. 23.True or false: the voltmeter is joined in series. (a) True (b) False
24. 24.Which of these is measured in ohms (Ω)? (a) voltage (b) the push of a cell (c) resistance (d) power
25. 25.Which of these is measured in volts (V)? (a) voltage (b) resistance (c) energy used each second (d) power
26. 26.True or false: the flow of charge is measured in watts (W). (a) True (b) False
27. 27.True or false: the push of a cell is measured in volts (V). (a) False (b) True
28. 28.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1000 (b) 10 (c) 100 (d) 1024
29. 29.📏 How many ohms (Ω) is 6 kΩ?
30. 30.📏 How many amperes (A) is 2260 mA? =
31. 31.📏 How many kilo-ohms (kΩ) is 5700 Ω? =
32. 32.True or false: current is measured in ohms (Ω). (a) False (b) True
33. 33.📏 Which unit measures energy used each second? (a) volt (V) (b) watt (W) (c) ohm (Ω) (d) ampere (A)
34. 34.📏 How many amperes (A) is 1880 mA? =
35. 35.True or false: resistance is measured in ohms (Ω). (a) True (b) False
36. 36.True or false: the ammeter measures voltage. (a) False (b) True
37. 37.📏 How many watts (W) is 0.4 kW?
38. 38.True or false: how much a part resists is measured in ohms (Ω). (a) False (b) True
39. 39.📏 How many watts (W) is 2.6 kW?
40. 40.True or false: the voltmeter is joined across a part. (a) False (b) True

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