Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 235 · 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) watt (W) (b) ohm (Ω) (c) volt (V) (d) ampere (A)
2. 2.Which of these is measured in ohms (Ω)? (a) voltage (b) the flow of charge (c) the push of a cell (d) how much a part resists
3. 3.📏 Which unit measures power? (a) ohm (Ω) (b) ampere (A) (c) volt (V) (d) watt (W)
4. 4.True or false: the flow of charge is measured in amperes (A). (a) False (b) True
5. 5.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
6. 6.Which of these is measured in watts (W)? (a) the push of a cell (b) the flow of charge (c) current (d) power
7. 7.Which of these is measured in volts (V)? (a) current (b) energy used each second (c) voltage (d) the flow of charge
8. 8.📏 In the water-pipe picture of a circuit, resistance is like … (a) the water pressure (b) a bigger tank (c) a narrow pipe (d) the flow of water
9. 9.True or false: the voltmeter is joined across a part. (a) True (b) False
10. 10.Which of these is measured in amperes (A)? (a) current (b) how much a part resists (c) the push of a cell (d) resistance
11. 11.📏 How many ohms (Ω) is 4.9 kΩ?
12. 12.📏 How many milliamperes (mA) is 2.57 A?
13. 13.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water tank lid (b) the water pressure (c) the pipe colour (d) the tap handle
14. 14.📏 How many milliamperes (mA) is 1.68 A?
15. 15.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
16. 16.True or false: resistance is measured in amperes (A). (a) True (b) False
17. 17.📏 How many milliamperes (mA) is 0.11 A?
18. 18.📏 How many milliamperes (mA) is 0.14 A?
19. 19.📏 Which unit measures resistance? (a) watt (W) (b) ampere (A) (c) volt (V) (d) ohm (Ω)
20. 20.True or false: the voltmeter measures current. (a) False (b) True
21. 21.True or false: the voltmeter is joined in series. (a) False (b) True
22. 22.True or false: the ammeter measures current. (a) True (b) False
23. 23.True or false: power is measured in watts (W). (a) True (b) False
24. 24.📏 Which unit measures current? (a) ampere (A) (b) volt (V) (c) watt (W) (d) ohm (Ω)
25. 25.📏 Which unit measures the flow of charge? (a) watt (W) (b) ohm (Ω) (c) volt (V) (d) ampere (A)
26. 26.📏 How many amperes (A) is 890 mA? =
27. 27.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
28. 28.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1024 (b) 10 (c) 100 (d) 1000
29. 29.📏 How many milliamperes (mA) is 1.12 A?
30. 30.📏 How many ohms (Ω) is 1.2 kΩ?
31. 31.True or false: the ammeter measures voltage. (a) True (b) False
32. 32.📏 How many kilo-ohms (kΩ) is 1400 Ω? =
33. 33.True or false: energy used each second is measured in watts (W). (a) True (b) False
34. 34.📏 How many kilowatts (kW) is 1200 W? =
35. 35.True or false: resistance is measured in ohms (Ω). (a) True (b) False
36. 36.📏 How many milliamperes (mA) is 1.14 A?
37. 37.📏 How many kilowatts (kW) is 3250 W? =
38. 38.📏 How many kilowatts (kW) is 3100 W? =
39. 39.📏 How many ohms (Ω) is 0.9 kΩ?
40. 40.True or false: the ammeter is joined across a part. (a) False (b) True

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