Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 865 · 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 kilowatts (kW) is 2150 W? =
2. 2.📏 Voltmeter or ammeter: which one is joined in series? (a) voltmeter (b) ammeter
3. 3.True or false: energy used each second is measured in amperes (A). (a) True (b) False
4. 4.📏 Which unit measures the push of a cell? (a) ohm (Ω) (b) ampere (A) (c) volt (V) (d) watt (W)
5. 5.📏 How many milliamperes (mA) make 1 ampere? (a) 1000 (b) 10 (c) 100 (d) 60
6. 6.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
7. 7.Which of these is measured in volts (V)? (a) current (b) voltage (c) how much a part resists (d) energy used each second
8. 8.📏 How many kilowatts (kW) is 1500 W? =
9. 9.📏 How many amperes (A) is 120 mA? =
10. 10.Which of these is measured in ohms (Ω)? (a) the push of a cell (b) the flow of charge (c) current (d) resistance
11. 11.True or false: the flow of charge is measured in ohms (Ω). (a) False (b) True
12. 12.Which of these is measured in watts (W)? (a) how much a part resists (b) the push of a cell (c) voltage (d) energy used each second
13. 13.📏 How many milliamperes (mA) is 0.57 A?
14. 14.📏 How many kilowatts (kW) is 900 W? =
15. 15.True or false: resistance is measured in watts (W). (a) False (b) True
16. 16.📏 How many watts (W) is 4.7 kW?
17. 17.True or false: energy used each second is measured in volts (V). (a) False (b) True
18. 18.True or false: the ammeter measures current. (a) True (b) False
19. 19.True or false: the push of a cell is measured in volts (V). (a) False (b) True
20. 20.📏 Which unit measures voltage? (a) watt (W) (b) ohm (Ω) (c) ampere (A) (d) volt (V)
21. 21.True or false: the voltmeter measures voltage. (a) True (b) False
22. 22.True or false: the ammeter is joined across a part. (a) False (b) True
23. 23.📏 In the water-pipe picture of a circuit, current is like … (a) a narrow pipe (b) the water pressure (c) the flow of water (d) the pipe colour
24. 24.Which of these is measured in watts (W)? (a) the push of a cell (b) power (c) resistance (d) voltage
25. 25.📏 How many kilo-ohms (kΩ) is 2000 Ω? =
26. 26.True or false: the voltmeter is joined in series. (a) True (b) False
27. 27.True or false: the push of a cell is measured in watts (W). (a) False (b) True
28. 28.📏 How many ohms (Ω) is 7.7 kΩ?
29. 29.📏 Which unit measures energy used each second? (a) ohm (Ω) (b) ampere (A) (c) watt (W) (d) volt (V)
30. 30.📏 How many amperes (A) is 930 mA? =
31. 31.📏 How many kilowatts (kW) is 4750 W? =
32. 32.📏 How many milliamperes (mA) is 2.55 A?
33. 33.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water pressure (b) the water tank lid (c) the pipe colour (d) the tap handle
34. 34.📏 Which unit measures how much a part resists? (a) volt (V) (b) ohm (Ω) (c) ampere (A) (d) watt (W)
35. 35.📏 How many watts (W) is 4.2 kW?
36. 36.📏 How many ohms (Ω) is 6.1 kΩ?
37. 37.True or false: energy used each second is measured in watts (W). (a) False (b) True
38. 38.True or false: the ammeter is joined in series. (a) False (b) True
39. 39.📏 How many ohms (Ω) is 4.5 kΩ?
40. 40.📏 How many milliamperes (mA) is 0.78 A?

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