Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 231 · 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 how much a part resists? (a) ampere (A) (b) ohm (Ω) (c) watt (W) (d) volt (V)
2. 2.📏 In the water-pipe picture of a circuit, current is like … (a) the flow of water (b) the water pressure (c) the pipe colour (d) a narrow pipe
3. 3.📏 Which unit measures current? (a) ampere (A) (b) volt (V) (c) ohm (Ω) (d) watt (W)
4. 4.📏 Which unit measures resistance? (a) watt (W) (b) ampere (A) (c) volt (V) (d) ohm (Ω)
5. 5.True or false: current is measured in amperes (A). (a) True (b) False
6. 6.True or false: power is measured in watts (W). (a) True (b) False
7. 7.Which of these is measured in volts (V)? (a) current (b) the push of a cell (c) resistance (d) the flow of charge
8. 8.📏 How many watts (W) is 2.7 kW?
9. 9.📏 How many ohms (Ω) is 4.1 kΩ?
10. 10.📏 How many milliamperes (mA) make 1 ampere? (a) 10 (b) 100 (c) 60 (d) 1000
11. 11.Which of these is measured in volts (V)? (a) resistance (b) how much a part resists (c) energy used each second (d) voltage
12. 12.True or false: energy used each second is measured in watts (W). (a) True (b) False
13. 13.True or false: energy used each second is measured in volts (V). (a) False (b) True
14. 14.True or false: the ammeter is joined across a part. (a) True (b) False
15. 15.📏 How many watts (W) is 2.1 kW?
16. 16.True or false: the voltmeter measures current. (a) True (b) False
17. 17.📏 Which unit measures the push of a cell? (a) watt (W) (b) volt (V) (c) ohm (Ω) (d) ampere (A)
18. 18.📏 How many kilo-ohms (kΩ) is 2900 Ω? =
19. 19.True or false: the push of a cell is measured in volts (V). (a) False (b) True
20. 20.True or false: how much a part resists is measured in ohms (Ω). (a) True (b) False
21. 21.📏 Which unit measures energy used each second? (a) ampere (A) (b) ohm (Ω) (c) watt (W) (d) volt (V)
22. 22.📏 In the water-pipe picture of a circuit, resistance is like … (a) a narrow pipe (b) the water pressure (c) a bigger tank (d) the flow of water
23. 23.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water pressure (b) the tap handle (c) the water tank lid (d) the pipe colour
24. 24.📏 How many ohms (Ω) is 1.7 kΩ?
25. 25.📏 How many milliamperes (mA) is 2.46 A?
26. 26.📏 How many amperes (A) is 1590 mA? =
27. 27.True or false: the ammeter is joined in series. (a) True (b) False
28. 28.True or false: the voltmeter measures voltage. (a) True (b) False
29. 29.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
30. 30.True or false: energy used each second is measured in ohms (Ω). (a) False (b) True
31. 31.Which of these is measured in watts (W)? (a) current (b) voltage (c) power (d) resistance
32. 32.True or false: the flow of charge is measured in ohms (Ω). (a) False (b) True
33. 33.📏 Which unit measures the flow of charge? (a) ohm (Ω) (b) ampere (A) (c) watt (W) (d) volt (V)
34. 34.📏 How many ohms (Ω) is 1 kΩ?
35. 35.📏 How many milliamperes (mA) is 2.07 A?
36. 36.True or false: the push of a cell is measured in amperes (A). (a) False (b) True
37. 37.True or false: voltage is measured in volts (V). (a) True (b) False
38. 38.📏 How many kilowatts (kW) is 4850 W? =
39. 39.📏 How many milliamperes (mA) is 0.73 A?
40. 40.📏 How many watts (W) is 4.5 kW?

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