Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 70 · 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 milliamperes (mA) is 0.43 A?
2. 2.📏 How many watts (W) is 1.4 kW?
3. 3.Which of these is measured in volts (V)? (a) energy used each second (b) resistance (c) the push of a cell (d) the flow of charge
4. 4.True or false: the ammeter measures current. (a) False (b) True
5. 5.📏 How many amperes (A) is 2760 mA? =
6. 6.True or false: how much a part resists is measured in amperes (A). (a) False (b) True
7. 7.📏 How many kilo-ohms (kΩ) is 5200 Ω? =
8. 8.📏 How many milliamperes (mA) make 1 ampere? (a) 1000 (b) 10 (c) 60 (d) 100
9. 9.📏 Which unit measures power? (a) ohm (Ω) (b) watt (W) (c) volt (V) (d) ampere (A)
10. 10.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
11. 11.📏 How many milliamperes (mA) is 0.39 A?
12. 12.True or false: the ammeter is joined in series. (a) True (b) False
13. 13.📏 Which unit measures the flow of charge? (a) ampere (A) (b) ohm (Ω) (c) watt (W) (d) volt (V)
14. 14.Which of these is measured in ohms (Ω)? (a) the push of a cell (b) resistance (c) voltage (d) current
15. 15.📏 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
16. 16.📏 How many amperes (A) is 730 mA? =
17. 17.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
18. 18.Which of these is measured in amperes (A)? (a) the flow of charge (b) voltage (c) power (d) energy used each second
19. 19.True or false: the voltmeter measures voltage. (a) False (b) True
20. 20.📏 How many watts (W) is 2 kW?
21. 21.📏 How many kilowatts (kW) is 50 W? =
22. 22.True or false: resistance is measured in volts (V). (a) True (b) False
23. 23.📏 Which unit measures how much a part resists? (a) watt (W) (b) ampere (A) (c) volt (V) (d) ohm (Ω)
24. 24.📏 Which unit measures the push of a cell? (a) watt (W) (b) volt (V) (c) ohm (Ω) (d) ampere (A)
25. 25.📏 How many ohms (Ω) is 5.5 kΩ?
26. 26.True or false: the flow of charge is measured in amperes (A). (a) True (b) False
27. 27.True or false: the flow of charge is measured in ohms (Ω). (a) False (b) True
28. 28.📏 How many milliamperes (mA) is 0.63 A?
29. 29.Which of these is measured in watts (W)? (a) voltage (b) the flow of charge (c) power (d) resistance
30. 30.📏 In the water-pipe picture of a circuit, resistance is like … (a) a bigger tank (b) a narrow pipe (c) the flow of water (d) the water pressure
31. 31.📏 How many kilo-ohms (kΩ) is 2500 Ω? =
32. 32.True or false: the ammeter measures voltage. (a) True (b) False
33. 33.📏 How many milliamperes (mA) is 1.03 A?
34. 34.Which of these is measured in amperes (A)? (a) resistance (b) the push of a cell (c) current (d) how much a part resists
35. 35.📏 How many watts (W) is 3.6 kW?
36. 36.📏 How many milliamperes (mA) is 2.94 A?
37. 37.True or false: current is measured in ohms (Ω). (a) False (b) True
38. 38.True or false: the voltmeter is joined in series. (a) True (b) False
39. 39.📏 Which unit measures resistance? (a) ohm (Ω) (b) watt (W) (c) volt (V) (d) ampere (A)
40. 40.True or false: how much a part resists is measured in ohms (Ω). (a) True (b) False

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