Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 399 · 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.True or false: power is measured in watts (W). (a) False (b) True
2. 2.📏 Voltmeter or ammeter: which one is joined in series? (a) voltmeter (b) ammeter
3. 3.True or false: the flow of charge is measured in amperes (A). (a) False (b) True
4. 4.Which of these is measured in amperes (A)? (a) the push of a cell (b) energy used each second (c) voltage (d) current
5. 5.True or false: resistance is measured in watts (W). (a) False (b) True
6. 6.Which of these is measured in watts (W)? (a) the flow of charge (b) voltage (c) the push of a cell (d) power
7. 7.📏 How many milliamperes (mA) is 0.77 A?
8. 8.True or false: energy used each second is measured in watts (W). (a) False (b) True
9. 9.📏 How many kilowatts (kW) is 4650 W? =
10. 10.Which of these is measured in volts (V)? (a) power (b) voltage (c) current (d) how much a part resists
11. 11.True or false: voltage is measured in ohms (Ω). (a) True (b) False
12. 12.True or false: current is measured in amperes (A). (a) True (b) False
13. 13.📏 Which unit measures energy used each second? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
14. 14.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water pressure (b) the tap handle (c) the water tank lid (d) the pipe colour
15. 15.📏 In the water-pipe picture of a circuit, current is like … (a) the flow of water (b) the water pressure (c) a narrow pipe (d) the pipe colour
16. 16.📏 How many milliamperes (mA) make 1 ampere? (a) 60 (b) 10 (c) 100 (d) 1000
17. 17.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1000 (b) 100 (c) 1024 (d) 10
18. 18.📏 How many kilo-ohms (kΩ) is 8200 Ω? =
19. 19.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
20. 20.📏 How many amperes (A) is 2990 mA? =
21. 21.📏 Which unit measures the flow of charge? (a) volt (V) (b) watt (W) (c) ampere (A) (d) ohm (Ω)
22. 22.📏 How many kilowatts (kW) is 750 W? =
23. 23.True or false: how much a part resists is measured in watts (W). (a) False (b) True
24. 24.True or false: current is measured in volts (V). (a) True (b) False
25. 25.📏 How many amperes (A) is 1740 mA? =
26. 26.True or false: the push of a cell is measured in amperes (A). (a) True (b) False
27. 27.📏 How many milliamperes (mA) is 1.57 A?
28. 28.📏 How many milliamperes (mA) is 0.23 A?
29. 29.True or false: the voltmeter is joined in series. (a) True (b) False
30. 30.📏 Which unit measures power? (a) ohm (Ω) (b) ampere (A) (c) volt (V) (d) watt (W)
31. 31.📏 How many amperes (A) is 310 mA? =
32. 32.📏 How many watts (W) is 3.8 kW?
33. 33.📏 How many watts (W) is 0.4 kW?
34. 34.📏 Which unit measures current? (a) volt (V) (b) watt (W) (c) ampere (A) (d) ohm (Ω)
35. 35.📏 How many amperes (A) is 640 mA? =
36. 36.📏 How many milliamperes (mA) is 2.87 A?
37. 37.True or false: the ammeter is joined across a part. (a) False (b) True
38. 38.📏 Which unit measures resistance? (a) ampere (A) (b) volt (V) (c) ohm (Ω) (d) watt (W)
39. 39.📏 How many kilo-ohms (kΩ) is 4400 Ω? =
40. 40.True or false: the ammeter measures voltage. (a) True (b) False

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