Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 147 · 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.True or false: energy used each second is measured in watts (W). (a) True (b) False
2. 2.📏 Which unit measures power? (a) ohm (Ω) (b) ampere (A) (c) volt (V) (d) watt (W)
3. 3.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
4. 4.📏 In the water-pipe picture of a circuit, voltage is like … (a) the pipe colour (b) the tap handle (c) the water pressure (d) the water tank lid
5. 5.📏 How many milliamperes (mA) is 0.25 A?
6. 6.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1000 (b) 1024 (c) 10 (d) 100
7. 7.True or false: power is measured in watts (W). (a) False (b) True
8. 8.Which of these is measured in amperes (A)? (a) current (b) power (c) the push of a cell (d) how much a part resists
9. 9.True or false: the voltmeter measures voltage. (a) True (b) False
10. 10.📏 How many watts (W) is 2.4 kW?
11. 11.📏 Which unit measures current? (a) ohm (Ω) (b) volt (V) (c) ampere (A) (d) watt (W)
12. 12.📏 How many ohms (Ω) is 8.5 kΩ?
13. 13.Which of these is measured in volts (V)? (a) the flow of charge (b) energy used each second (c) power (d) voltage
14. 14.📏 Which unit measures voltage? (a) ampere (A) (b) ohm (Ω) (c) volt (V) (d) watt (W)
15. 15.📏 How many milliamperes (mA) is 0.38 A?
16. 16.📏 How many amperes (A) is 900 mA? =
17. 17.📏 How many milliamperes (mA) is 1.07 A?
18. 18.📏 How many milliamperes (mA) is 1.62 A?
19. 19.📏 Which unit measures how much a part resists? (a) watt (W) (b) ohm (Ω) (c) volt (V) (d) ampere (A)
20. 20.True or false: the push of a cell is measured in ohms (Ω). (a) False (b) True
21. 21.📏 How many amperes (A) is 70 mA? =
22. 22.True or false: the ammeter is joined across a part. (a) True (b) False
23. 23.📏 How many amperes (A) is 2870 mA? =
24. 24.True or false: the ammeter measures current. (a) False (b) True
25. 25.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
26. 26.True or false: voltage is measured in volts (V). (a) True (b) False
27. 27.📏 How many kilowatts (kW) is 4850 W? =
28. 28.📏 How many kilo-ohms (kΩ) is 8000 Ω? =
29. 29.Which of these is measured in volts (V)? (a) the flow of charge (b) the push of a cell (c) current (d) how much a part resists
30. 30.📏 How many milliamperes (mA) make 1 ampere? (a) 60 (b) 10 (c) 100 (d) 1000
31. 31.📏 Which unit measures energy used each second? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
32. 32.True or false: the voltmeter is joined in series. (a) True (b) False
33. 33.📏 How many amperes (A) is 2290 mA? =
34. 34.📏 How many milliamperes (mA) is 2.51 A?
35. 35.📏 How many milliamperes (mA) is 2.38 A?
36. 36.True or false: power is measured in amperes (A). (a) False (b) True
37. 37.📏 Voltmeter or ammeter: which one is joined in series? (a) voltmeter (b) ammeter
38. 38.True or false: the flow of charge is measured in ohms (Ω). (a) True (b) False
39. 39.📏 How many kilo-ohms (kΩ) is 9100 Ω? =
40. 40.Which of these is measured in ohms (Ω)? (a) power (b) energy used each second (c) resistance (d) the flow of charge

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