Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 854 · 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: how much a part resists is measured in ohms (Ω). (a) True (b) False
2. 2.True or false: voltage is measured in volts (V). (a) False (b) True
3. 3.📏 Which unit measures the flow of charge? (a) watt (W) (b) volt (V) (c) ampere (A) (d) ohm (Ω)
4. 4.True or false: the ammeter measures voltage. (a) False (b) True
5. 5.Which of these is measured in volts (V)? (a) voltage (b) how much a part resists (c) energy used each second (d) resistance
6. 6.📏 How many watts (W) is 3.1 kW?
7. 7.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
8. 8.📏 How many kilowatts (kW) is 50 W? =
9. 9.📏 How many amperes (A) is 320 mA? =
10. 10.True or false: the voltmeter measures voltage. (a) False (b) True
11. 11.📏 How many kilowatts (kW) is 500 W? =
12. 12.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
13. 13.📏 How many amperes (A) is 240 mA? =
14. 14.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1024 (b) 100 (c) 1000 (d) 10
15. 15.📏 How many amperes (A) is 2010 mA? =
16. 16.📏 How many ohms (Ω) is 9.4 kΩ?
17. 17.📏 Which unit measures voltage? (a) ampere (A) (b) ohm (Ω) (c) watt (W) (d) volt (V)
18. 18.📏 How many milliamperes (mA) make 1 ampere? (a) 1000 (b) 100 (c) 60 (d) 10
19. 19.📏 In the water-pipe picture of a circuit, voltage is like … (a) the pipe colour (b) the water tank lid (c) the water pressure (d) the tap handle
20. 20.Which of these is measured in amperes (A)? (a) the push of a cell (b) resistance (c) energy used each second (d) the flow of charge
21. 21.📏 Which unit measures resistance? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
22. 22.Which of these is measured in ohms (Ω)? (a) resistance (b) the flow of charge (c) energy used each second (d) the push of a cell
23. 23.📏 Which unit measures the push of a cell? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
24. 24.Which of these is measured in amperes (A)? (a) voltage (b) resistance (c) current (d) power
25. 25.📏 In the water-pipe picture of a circuit, current is like … (a) the pipe colour (b) a narrow pipe (c) the flow of water (d) the water pressure
26. 26.📏 How many milliamperes (mA) is 0.81 A?
27. 27.Which of these is measured in volts (V)? (a) energy used each second (b) current (c) the push of a cell (d) power
28. 28.📏 How many kilowatts (kW) is 650 W? =
29. 29.True or false: resistance is measured in watts (W). (a) True (b) False
30. 30.📏 How many amperes (A) is 770 mA? =
31. 31.📏 How many watts (W) is 4.3 kW?
32. 32.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
33. 33.📏 How many watts (W) is 1.4 kW?
34. 34.True or false: power is measured in watts (W). (a) True (b) False
35. 35.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
36. 36.True or false: current is measured in amperes (A). (a) False (b) True
37. 37.📏 How many kilo-ohms (kΩ) is 1100 Ω? =
38. 38.📏 How many kilo-ohms (kΩ) is 7900 Ω? =
39. 39.📏 How many milliamperes (mA) is 2.71 A?
40. 40.📏 How many amperes (A) is 160 mA? =

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