Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 808 · 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 power? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
2. 2.Which of these is measured in watts (W)? (a) resistance (b) the flow of charge (c) voltage (d) energy used each second
3. 3.True or false: power is measured in ohms (Ω). (a) True (b) False
4. 4.📏 Which unit measures the push of a cell? (a) watt (W) (b) volt (V) (c) ohm (Ω) (d) ampere (A)
5. 5.📏 Which unit measures the flow of charge? (a) watt (W) (b) ohm (Ω) (c) volt (V) (d) ampere (A)
6. 6.📏 In the water-pipe picture of a circuit, resistance is like … (a) the water pressure (b) a narrow pipe (c) a bigger tank (d) the flow of water
7. 7.📏 How many amperes (A) is 290 mA? =
8. 8.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
9. 9.📏 Which unit measures current? (a) watt (W) (b) ohm (Ω) (c) volt (V) (d) ampere (A)
10. 10.True or false: power is measured in amperes (A). (a) False (b) True
11. 11.True or false: the voltmeter measures voltage. (a) False (b) True
12. 12.Which of these is measured in amperes (A)? (a) the push of a cell (b) how much a part resists (c) energy used each second (d) the flow of charge
13. 13.True or false: the ammeter measures current. (a) False (b) True
14. 14.📏 How many milliamperes (mA) make 1 ampere? (a) 10 (b) 60 (c) 100 (d) 1000
15. 15.True or false: the flow of charge is measured in amperes (A). (a) False (b) True
16. 16.📏 How many watts (W) is 4.9 kW?
17. 17.True or false: the push of a cell is measured in amperes (A). (a) True (b) False
18. 18.Which of these is measured in volts (V)? (a) voltage (b) current (c) energy used each second (d) resistance
19. 19.True or false: resistance is measured in ohms (Ω). (a) True (b) False
20. 20.Which of these is measured in volts (V)? (a) the push of a cell (b) energy used each second (c) how much a part resists (d) current
21. 21.Which of these is measured in watts (W)? (a) the push of a cell (b) current (c) voltage (d) power
22. 22.True or false: power is measured in watts (W). (a) False (b) True
23. 23.📏 Which unit measures how much a part resists? (a) volt (V) (b) ampere (A) (c) ohm (Ω) (d) watt (W)
24. 24.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
25. 25.📏 How many amperes (A) is 1680 mA? =
26. 26.📏 Which unit measures voltage? (a) ohm (Ω) (b) watt (W) (c) volt (V) (d) ampere (A)
27. 27.📏 How many ohms (Ω) is 4.6 kΩ?
28. 28.📏 How many ohms (Ω) is 7.3 kΩ?
29. 29.📏 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
30. 30.📏 How many kilowatts (kW) is 150 W? =
31. 31.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 100 (b) 10 (c) 1000 (d) 1024
32. 32.📏 How many amperes (A) is 50 mA? =
33. 33.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
34. 34.Which of these is measured in ohms (Ω)? (a) the flow of charge (b) voltage (c) current (d) how much a part resists
35. 35.True or false: energy used each second is measured in volts (V). (a) True (b) False
36. 36.📏 How many milliamperes (mA) is 0.69 A?
37. 37.True or false: the voltmeter is joined across a part. (a) False (b) True
38. 38.📏 How many milliamperes (mA) is 0.03 A?
39. 39.True or false: the ammeter is joined across a part. (a) False (b) True
40. 40.📏 How many ohms (Ω) is 3.9 kΩ?

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