Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 787 · 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 energy used each second? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
2. 2.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water tank lid (b) the pipe colour (c) the water pressure (d) the tap handle
3. 3.Which of these is measured in ohms (Ω)? (a) the flow of charge (b) voltage (c) how much a part resists (d) the push of a cell
4. 4.📏 Which unit measures power? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
5. 5.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
6. 6.📏 In the water-pipe picture of a circuit, resistance is like … (a) the flow of water (b) a bigger tank (c) a narrow pipe (d) the water pressure
7. 7.📏 Which unit measures how much a part resists? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
8. 8.📏 In the water-pipe picture of a circuit, current is like … (a) the flow of water (b) the pipe colour (c) the water pressure (d) a narrow pipe
9. 9.📏 How many amperes (A) is 950 mA? =
10. 10.True or false: power is measured in ohms (Ω). (a) False (b) True
11. 11.📏 How many milliamperes (mA) is 1.29 A?
12. 12.Which of these is measured in volts (V)? (a) resistance (b) voltage (c) current (d) the flow of charge
13. 13.📏 How many kilo-ohms (kΩ) is 1400 Ω? =
14. 14.📏 Which unit measures the push of a cell? (a) volt (V) (b) ampere (A) (c) ohm (Ω) (d) watt (W)
15. 15.True or false: how much a part resists is measured in ohms (Ω). (a) True (b) False
16. 16.📏 How many amperes (A) is 2410 mA? =
17. 17.📏 How many kilo-ohms (kΩ) is 7900 Ω? =
18. 18.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
19. 19.📏 How many kilo-ohms (kΩ) is 8400 Ω? =
20. 20.True or false: the ammeter is joined across a part. (a) False (b) True
21. 21.True or false: the ammeter measures voltage. (a) False (b) True
22. 22.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
23. 23.True or false: the ammeter is joined in series. (a) True (b) False
24. 24.📏 How many ohms (Ω) is 5.1 kΩ?
25. 25.Which of these is measured in amperes (A)? (a) the push of a cell (b) voltage (c) current (d) how much a part resists
26. 26.📏 How many milliamperes (mA) is 2.39 A?
27. 27.📏 Which unit measures resistance? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
28. 28.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
29. 29.📏 How many kilowatts (kW) is 3350 W? =
30. 30.True or false: the ammeter measures current. (a) False (b) True
31. 31.📏 How many kilowatts (kW) is 2850 W? =
32. 32.📏 How many kilowatts (kW) is 1200 W? =
33. 33.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 100 (b) 10 (c) 1024 (d) 1000
34. 34.📏 How many watts (W) is 2.7 kW?
35. 35.📏 How many kilowatts (kW) is 4100 W? =
36. 36.📏 How many milliamperes (mA) make 1 ampere? (a) 100 (b) 10 (c) 60 (d) 1000
37. 37.True or false: energy used each second is measured in volts (V). (a) True (b) False
38. 38.True or false: the push of a cell is measured in watts (W). (a) True (b) False
39. 39.📏 How many ohms (Ω) is 7.7 kΩ?
40. 40.📏 How many amperes (A) is 2590 mA? =

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