Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 692 · 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) make 1 ampere? (a) 1000 (b) 100 (c) 10 (d) 60
2. 2.📏 How many amperes (A) is 70 mA? =
3. 3.📏 Which unit measures voltage? (a) ohm (Ω) (b) ampere (A) (c) watt (W) (d) volt (V)
4. 4.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water tank lid (b) the pipe colour (c) the tap handle (d) the water pressure
5. 5.True or false: voltage is measured in amperes (A). (a) False (b) True
6. 6.True or false: how much a part resists is measured in ohms (Ω). (a) True (b) False
7. 7.True or false: the voltmeter is joined across a part. (a) False (b) True
8. 8.📏 In the water-pipe picture of a circuit, current is like … (a) the pipe colour (b) the water pressure (c) a narrow pipe (d) the flow of water
9. 9.📏 How many kilowatts (kW) is 3550 W? =
10. 10.📏 How many kilowatts (kW) is 2400 W? =
11. 11.True or false: the ammeter is joined across a part. (a) True (b) False
12. 12.📏 Which unit measures the push of a cell? (a) watt (W) (b) volt (V) (c) ampere (A) (d) ohm (Ω)
13. 13.Which of these is measured in ohms (Ω)? (a) energy used each second (b) voltage (c) resistance (d) the push of a cell
14. 14.Which of these is measured in volts (V)? (a) current (b) the flow of charge (c) how much a part resists (d) the push of a cell
15. 15.True or false: the voltmeter measures current. (a) False (b) True
16. 16.True or false: the push of a cell is measured in volts (V). (a) True (b) False
17. 17.True or false: the ammeter measures voltage. (a) False (b) True
18. 18.True or false: the flow of charge is measured in volts (V). (a) False (b) True
19. 19.📏 How many kilowatts (kW) is 2250 W? =
20. 20.📏 How many milliamperes (mA) is 1.07 A?
21. 21.Which of these is measured in ohms (Ω)? (a) energy used each second (b) voltage (c) power (d) how much a part resists
22. 22.📏 How many amperes (A) is 2890 mA? =
23. 23.True or false: the flow of charge is measured in ohms (Ω). (a) False (b) True
24. 24.📏 How many watts (W) is 5 kW?
25. 25.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
26. 26.📏 How many amperes (A) is 230 mA? =
27. 27.📏 Which unit measures energy used each second? (a) volt (V) (b) watt (W) (c) ohm (Ω) (d) ampere (A)
28. 28.📏 How many kilowatts (kW) is 2700 W? =
29. 29.📏 How many ohms (Ω) is 6.2 kΩ?
30. 30.📏 How many amperes (A) is 2070 mA? =
31. 31.📏 How many milliamperes (mA) is 2.94 A?
32. 32.Which of these is measured in amperes (A)? (a) how much a part resists (b) power (c) energy used each second (d) current
33. 33.True or false: voltage is measured in volts (V). (a) False (b) True
34. 34.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
35. 35.📏 How many milliamperes (mA) is 0.21 A?
36. 36.📏 How many kilo-ohms (kΩ) is 3700 Ω? =
37. 37.📏 How many amperes (A) is 850 mA? =
38. 38.True or false: how much a part resists is measured in watts (W). (a) True (b) False
39. 39.True or false: power is measured in watts (W). (a) False (b) True
40. 40.📏 In the water-pipe picture of a circuit, resistance is like … (a) the water pressure (b) a bigger tank (c) the flow of water (d) a narrow pipe

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