Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 45 · 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 of these is measured in ohms (Ω)? (a) how much a part resists (b) the push of a cell (c) power (d) current
2. 2.Which of these is measured in amperes (A)? (a) power (b) voltage (c) current (d) energy used each second
3. 3.Which of these is measured in watts (W)? (a) power (b) current (c) resistance (d) the flow of charge
4. 4.📏 In the water-pipe picture of a circuit, current is like … (a) the water pressure (b) the pipe colour (c) a narrow pipe (d) the flow of water
5. 5.True or false: energy used each second is measured in watts (W). (a) False (b) True
6. 6.True or false: resistance is measured in volts (V). (a) False (b) True
7. 7.True or false: the ammeter measures current. (a) True (b) False
8. 8.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
9. 9.📏 How many kilowatts (kW) is 1000 W? =
10. 10.📏 In the water-pipe picture of a circuit, voltage is like … (a) the tap handle (b) the water pressure (c) the water tank lid (d) the pipe colour
11. 11.True or false: energy used each second is measured in amperes (A). (a) False (b) True
12. 12.True or false: the ammeter is joined in series. (a) False (b) True
13. 13.📏 How many ohms (Ω) is 4.9 kΩ?
14. 14.Which of these is measured in amperes (A)? (a) energy used each second (b) how much a part resists (c) the flow of charge (d) voltage
15. 15.📏 How many amperes (A) is 1950 mA? =
16. 16.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
17. 17.📏 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
18. 18.📏 How many kilowatts (kW) is 3250 W? =
19. 19.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
20. 20.📏 How many watts (W) is 0.1 kW?
21. 21.📏 Which unit measures voltage? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
22. 22.True or false: power is measured in watts (W). (a) True (b) False
23. 23.📏 Which unit measures energy used each second? (a) ohm (Ω) (b) watt (W) (c) volt (V) (d) ampere (A)
24. 24.📏 How many milliamperes (mA) is 0.7 A?
25. 25.📏 Which unit measures current? (a) volt (V) (b) ohm (Ω) (c) watt (W) (d) ampere (A)
26. 26.True or false: resistance is measured in ohms (Ω). (a) False (b) True
27. 27.Which of these is measured in volts (V)? (a) the push of a cell (b) energy used each second (c) resistance (d) power
28. 28.True or false: the flow of charge is measured in amperes (A). (a) False (b) True
29. 29.📏 Which unit measures how much a part resists? (a) ohm (Ω) (b) ampere (A) (c) volt (V) (d) watt (W)
30. 30.📏 How many milliamperes (mA) make 1 ampere? (a) 1000 (b) 100 (c) 60 (d) 10
31. 31.📏 Which unit measures the push of a cell? (a) ampere (A) (b) ohm (Ω) (c) watt (W) (d) volt (V)
32. 32.📏 How many amperes (A) is 1090 mA? =
33. 33.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
34. 34.📏 How many ohms (Ω) is 6.3 kΩ?
35. 35.True or false: the flow of charge is measured in volts (V). (a) False (b) True
36. 36.Which of these is measured in watts (W)? (a) the flow of charge (b) the push of a cell (c) energy used each second (d) how much a part resists
37. 37.True or false: current is measured in amperes (A). (a) False (b) True
38. 38.True or false: the voltmeter is joined in series. (a) True (b) False
39. 39.📏 How many kilowatts (kW) is 4100 W? =
40. 40.📏 How many milliamperes (mA) is 1.5 A?

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