Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 32 · 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.📏 How many watts (W) is 1.2 kW?
2. 2.📏 In the water-pipe picture of a circuit, current is like … (a) the water pressure (b) a narrow pipe (c) the pipe colour (d) the flow of water
3. 3.Which of these is measured in volts (V)? (a) power (b) voltage (c) the flow of charge (d) resistance
4. 4.📏 Which unit measures the flow of charge? (a) volt (V) (b) ampere (A) (c) ohm (Ω) (d) watt (W)
5. 5.📏 Which unit measures resistance? (a) watt (W) (b) ampere (A) (c) ohm (Ω) (d) volt (V)
6. 6.📏 How many milliamperes (mA) is 1.7 A?
7. 7.📏 How many watts (W) is 4.7 kW?
8. 8.True or false: voltage is measured in ohms (Ω). (a) True (b) False
9. 9.Which of these is measured in amperes (A)? (a) current (b) how much a part resists (c) resistance (d) energy used each second
10. 10.📏 How many watts (W) is 3.4 kW?
11. 11.Which of these is measured in ohms (Ω)? (a) the flow of charge (b) power (c) how much a part resists (d) current
12. 12.📏 How many kilo-ohms (kΩ) is 7700 Ω? =
13. 13.Which of these is measured in volts (V)? (a) current (b) the push of a cell (c) how much a part resists (d) power
14. 14.True or false: how much a part resists is measured in ohms (Ω). (a) True (b) False
15. 15.📏 How many amperes (A) is 1990 mA? =
16. 16.True or false: the voltmeter measures current. (a) True (b) False
17. 17.📏 Which unit measures power? (a) ohm (Ω) (b) ampere (A) (c) volt (V) (d) watt (W)
18. 18.True or false: the ammeter is joined in series. (a) False (b) True
19. 19.True or false: current is measured in volts (V). (a) True (b) False
20. 20.True or false: the ammeter is joined across a part. (a) True (b) False
21. 21.📏 Which unit measures the push of a cell? (a) ohm (Ω) (b) volt (V) (c) watt (W) (d) ampere (A)
22. 22.📏 How many ohms (Ω) is 8.6 kΩ?
23. 23.📏 How many kilowatts (kW) is 4600 W? =
24. 24.📏 How many ohms (Ω) is 1.5 kΩ?
25. 25.📏 Voltmeter or ammeter: which one is joined in series? (a) voltmeter (b) ammeter
26. 26.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
27. 27.True or false: current is measured in amperes (A). (a) False (b) True
28. 28.Which of these is measured in watts (W)? (a) how much a part resists (b) current (c) power (d) the push of a cell
29. 29.📏 How many watts (W) is 2.6 kW?
30. 30.True or false: energy used each second is measured in amperes (A). (a) True (b) False
31. 31.True or false: the ammeter measures voltage. (a) False (b) True
32. 32.Which of these is measured in amperes (A)? (a) the flow of charge (b) the push of a cell (c) how much a part resists (d) voltage
33. 33.Which of these is measured in ohms (Ω)? (a) voltage (b) the flow of charge (c) energy used each second (d) resistance
34. 34.True or false: the push of a cell is measured in watts (W). (a) True (b) False
35. 35.📏 How many milliamperes (mA) make 1 ampere? (a) 1000 (b) 100 (c) 10 (d) 60
36. 36.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
37. 37.True or false: the flow of charge is measured in ohms (Ω). (a) True (b) False
38. 38.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 100 (b) 1024 (c) 1000 (d) 10
39. 39.📏 Which unit measures how much a part resists? (a) ohm (Ω) (b) ampere (A) (c) volt (V) (d) watt (W)
40. 40.True or false: the voltmeter is joined in series. (a) True (b) False

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