Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 949 · 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.Which of these is measured in watts (W)? (a) energy used each second (b) how much a part resists (c) current (d) voltage
2. 2.📏 In the water-pipe picture of a circuit, voltage is like … (a) the tap handle (b) the water tank lid (c) the pipe colour (d) the water pressure
3. 3.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
4. 4.True or false: the ammeter measures voltage. (a) False (b) True
5. 5.📏 How many milliamperes (mA) make 1 ampere? (a) 60 (b) 10 (c) 1000 (d) 100
6. 6.Which of these is measured in watts (W)? (a) voltage (b) the flow of charge (c) how much a part resists (d) power
7. 7.📏 Which unit measures the push of a cell? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
8. 8.Which of these is measured in amperes (A)? (a) how much a part resists (b) voltage (c) current (d) the push of a cell
9. 9.📏 Which unit measures the flow of charge? (a) ampere (A) (b) volt (V) (c) watt (W) (d) ohm (Ω)
10. 10.📏 In the water-pipe picture of a circuit, current is like … (a) a narrow pipe (b) the water pressure (c) the pipe colour (d) the flow of water
11. 11.📏 Voltmeter or ammeter: which one is joined in series? (a) voltmeter (b) ammeter
12. 12.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1000 (b) 100 (c) 1024 (d) 10
13. 13.📏 Which unit measures current? (a) volt (V) (b) watt (W) (c) ampere (A) (d) ohm (Ω)
14. 14.True or false: current is measured in watts (W). (a) True (b) False
15. 15.True or false: resistance is measured in ohms (Ω). (a) False (b) True
16. 16.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
17. 17.📏 Which unit measures power? (a) volt (V) (b) ampere (A) (c) watt (W) (d) ohm (Ω)
18. 18.📏 How many watts (W) is 1 kW?
19. 19.📏 How many watts (W) is 4.8 kW?
20. 20.📏 How many amperes (A) is 470 mA? =
21. 21.Which of these is measured in volts (V)? (a) current (b) how much a part resists (c) the push of a cell (d) resistance
22. 22.📏 In the water-pipe picture of a circuit, resistance is like … (a) the flow of water (b) a narrow pipe (c) the water pressure (d) a bigger tank
23. 23.True or false: power is measured in watts (W). (a) True (b) False
24. 24.📏 How many ohms (Ω) is 1.7 kΩ?
25. 25.📏 How many milliamperes (mA) is 1.63 A?
26. 26.📏 Which unit measures energy used each second? (a) watt (W) (b) volt (V) (c) ampere (A) (d) ohm (Ω)
27. 27.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
28. 28.True or false: the flow of charge is measured in amperes (A). (a) True (b) False
29. 29.📏 Which unit measures how much a part resists? (a) watt (W) (b) ohm (Ω) (c) ampere (A) (d) volt (V)
30. 30.Which of these is measured in ohms (Ω)? (a) power (b) resistance (c) current (d) energy used each second
31. 31.True or false: current is measured in ohms (Ω). (a) False (b) True
32. 32.True or false: the ammeter is joined across a part. (a) False (b) True
33. 33.📏 How many ohms (Ω) is 0.9 kΩ?
34. 34.True or false: the voltmeter is joined in series. (a) False (b) True
35. 35.📏 How many ohms (Ω) is 4.7 kΩ?
36. 36.📏 How many amperes (A) is 560 mA? =
37. 37.📏 How many watts (W) is 2.9 kW?
38. 38.📏 How many milliamperes (mA) is 0.41 A?
39. 39.True or false: power is measured in ohms (Ω). (a) True (b) False
40. 40.📏 How many watts (W) is 0.8 kW?

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids