Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 377 · 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 0.49 A?
2. 2.Which of these is measured in volts (V)? (a) energy used each second (b) power (c) the flow of charge (d) voltage
3. 3.📏 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
4. 4.📏 How many kilowatts (kW) is 4800 W? =
5. 5.📏 How many amperes (A) is 400 mA? =
6. 6.📏 How many amperes (A) is 2360 mA? =
7. 7.True or false: power is measured in ohms (Ω). (a) True (b) False
8. 8.📏 Which unit measures how much a part resists? (a) ohm (Ω) (b) ampere (A) (c) volt (V) (d) watt (W)
9. 9.True or false: how much a part resists is measured in amperes (A). (a) False (b) True
10. 10.True or false: the voltmeter measures current. (a) True (b) False
11. 11.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1024 (b) 10 (c) 1000 (d) 100
12. 12.📏 How many kilowatts (kW) is 900 W? =
13. 13.📏 How many kilowatts (kW) is 2100 W? =
14. 14.True or false: the ammeter measures voltage. (a) False (b) True
15. 15.True or false: the voltmeter is joined across a part. (a) False (b) True
16. 16.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
17. 17.True or false: resistance is measured in amperes (A). (a) False (b) True
18. 18.True or false: the flow of charge is measured in amperes (A). (a) False (b) True
19. 19.True or false: how much a part resists is measured in volts (V). (a) True (b) False
20. 20.📏 Which unit measures power? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
21. 21.📏 Which unit measures the flow of charge? (a) watt (W) (b) volt (V) (c) ampere (A) (d) ohm (Ω)
22. 22.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
23. 23.📏 How many milliamperes (mA) is 2.03 A?
24. 24.📏 How many amperes (A) is 1090 mA? =
25. 25.📏 How many milliamperes (mA) make 1 ampere? (a) 60 (b) 100 (c) 1000 (d) 10
26. 26.📏 Which unit measures the push of a cell? (a) ampere (A) (b) volt (V) (c) ohm (Ω) (d) watt (W)
27. 27.True or false: the ammeter measures current. (a) True (b) False
28. 28.True or false: the voltmeter measures voltage. (a) False (b) True
29. 29.📏 How many ohms (Ω) is 6.1 kΩ?
30. 30.Which of these is measured in watts (W)? (a) resistance (b) how much a part resists (c) the flow of charge (d) energy used each second
31. 31.Which of these is measured in amperes (A)? (a) power (b) voltage (c) how much a part resists (d) current
32. 32.📏 Which unit measures resistance? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
33. 33.True or false: voltage is measured in volts (V). (a) False (b) True
34. 34.Which of these is measured in ohms (Ω)? (a) energy used each second (b) voltage (c) the flow of charge (d) resistance
35. 35.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water tank lid (b) the tap handle (c) the pipe colour (d) the water pressure
36. 36.Which of these is measured in volts (V)? (a) energy used each second (b) the push of a cell (c) resistance (d) current
37. 37.📏 Which unit measures current? (a) ohm (Ω) (b) volt (V) (c) watt (W) (d) ampere (A)
38. 38.Which of these is measured in ohms (Ω)? (a) how much a part resists (b) the flow of charge (c) power (d) voltage
39. 39.📏 How many kilowatts (kW) is 650 W? =
40. 40.True or false: the ammeter is joined across a part. (a) False (b) True

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