Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 25 · 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 unit measures current? (a) volt (V) (b) ohm (Ω) (c) watt (W) (d) ampere (A)
2. 2.📏 How many milliamperes (mA) is 2.65 A?
3. 3.📏 Which unit measures resistance? (a) watt (W) (b) ohm (Ω) (c) volt (V) (d) ampere (A)
4. 4.Which of these is measured in watts (W)? (a) power (b) how much a part resists (c) resistance (d) voltage
5. 5.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
6. 6.📏 How many milliamperes (mA) make 1 ampere? (a) 100 (b) 10 (c) 60 (d) 1000
7. 7.True or false: the ammeter measures voltage. (a) False (b) True
8. 8.True or false: the flow of charge is measured in watts (W). (a) False (b) True
9. 9.True or false: the push of a cell is measured in volts (V). (a) False (b) True
10. 10.Which of these is measured in volts (V)? (a) the flow of charge (b) power (c) voltage (d) current
11. 11.📏 How many kilo-ohms (kΩ) is 2300 Ω? =
12. 12.True or false: the voltmeter measures voltage. (a) True (b) False
13. 13.True or false: current is measured in volts (V). (a) True (b) False
14. 14.📏 Which unit measures energy used each second? (a) volt (V) (b) ampere (A) (c) ohm (Ω) (d) watt (W)
15. 15.Which of these is measured in volts (V)? (a) energy used each second (b) how much a part resists (c) the push of a cell (d) power
16. 16.📏 How many watts (W) is 0.8 kW?
17. 17.📏 In the water-pipe picture of a circuit, resistance is like … (a) the water pressure (b) the flow of water (c) a bigger tank (d) a narrow pipe
18. 18.True or false: resistance is measured in watts (W). (a) False (b) True
19. 19.📏 How many kilowatts (kW) is 2250 W? =
20. 20.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
21. 21.True or false: energy used each second is measured in amperes (A). (a) True (b) False
22. 22.📏 Which unit measures power? (a) volt (V) (b) ampere (A) (c) ohm (Ω) (d) watt (W)
23. 23.True or false: voltage is measured in watts (W). (a) True (b) False
24. 24.📏 Which unit measures how much a part resists? (a) volt (V) (b) watt (W) (c) ampere (A) (d) ohm (Ω)
25. 25.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1000 (b) 100 (c) 10 (d) 1024
26. 26.True or false: how much a part resists is measured in amperes (A). (a) True (b) False
27. 27.Which of these is measured in amperes (A)? (a) voltage (b) how much a part resists (c) power (d) the flow of charge
28. 28.📏 In the water-pipe picture of a circuit, voltage is like … (a) the tap handle (b) the water tank lid (c) the water pressure (d) the pipe colour
29. 29.📏 How many watts (W) is 1.2 kW?
30. 30.Which of these is measured in amperes (A)? (a) the push of a cell (b) energy used each second (c) current (d) resistance
31. 31.True or false: the voltmeter is joined across a part. (a) False (b) True
32. 32.📏 How many amperes (A) is 2770 mA? =
33. 33.📏 How many kilo-ohms (kΩ) is 7000 Ω? =
34. 34.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
35. 35.📏 Which unit measures voltage? (a) watt (W) (b) volt (V) (c) ohm (Ω) (d) ampere (A)
36. 36.📏 How many kilowatts (kW) is 2750 W? =
37. 37.Which of these is measured in watts (W)? (a) current (b) resistance (c) voltage (d) energy used each second
38. 38.📏 How many milliamperes (mA) is 1.01 A?
39. 39.📏 How many kilo-ohms (kΩ) is 5400 Ω? =
40. 40.📏 How many milliamperes (mA) is 1.29 A?

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