Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 255 · 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: the push of a cell is measured in watts (W). (a) True (b) False
2. 2.📏 Which unit measures current? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
3. 3.Which of these is measured in ohms (Ω)? (a) resistance (b) voltage (c) the flow of charge (d) current
4. 4.📏 How many milliamperes (mA) is 0.26 A?
5. 5.True or false: the ammeter measures current. (a) False (b) True
6. 6.📏 Which unit measures voltage? (a) ampere (A) (b) ohm (Ω) (c) watt (W) (d) volt (V)
7. 7.📏 How many milliamperes (mA) is 0.05 A?
8. 8.📏 Voltmeter or ammeter: which one is joined in series? (a) voltmeter (b) ammeter
9. 9.Which of these is measured in watts (W)? (a) the push of a cell (b) resistance (c) power (d) current
10. 10.Which of these is measured in volts (V)? (a) resistance (b) how much a part resists (c) voltage (d) current
11. 11.📏 How many kilo-ohms (kΩ) is 2000 Ω? =
12. 12.📏 How many kilo-ohms (kΩ) is 4600 Ω? =
13. 13.📏 How many amperes (A) is 90 mA? =
14. 14.Which of these is measured in volts (V)? (a) power (b) the flow of charge (c) current (d) the push of a cell
15. 15.Which of these is measured in amperes (A)? (a) voltage (b) how much a part resists (c) current (d) energy used each second
16. 16.Which of these is measured in watts (W)? (a) energy used each second (b) resistance (c) how much a part resists (d) voltage
17. 17.📏 How many kilowatts (kW) is 300 W? =
18. 18.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
19. 19.📏 Which unit measures how much a part resists? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
20. 20.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1000 (b) 1024 (c) 100 (d) 10
21. 21.True or false: the voltmeter is joined in series. (a) True (b) False
22. 22.True or false: the flow of charge is measured in amperes (A). (a) False (b) True
23. 23.📏 How many amperes (A) is 2310 mA? =
24. 24.True or false: the ammeter measures voltage. (a) False (b) True
25. 25.📏 In the water-pipe picture of a circuit, current is like … (a) the flow of water (b) the pipe colour (c) the water pressure (d) a narrow pipe
26. 26.True or false: the voltmeter measures voltage. (a) False (b) True
27. 27.True or false: the push of a cell is measured in volts (V). (a) False (b) True
28. 28.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water pressure (b) the pipe colour (c) the water tank lid (d) the tap handle
29. 29.📏 How many kilowatts (kW) is 5000 W? =
30. 30.📏 How many amperes (A) is 510 mA? =
31. 31.True or false: current is measured in ohms (Ω). (a) False (b) True
32. 32.📏 Which unit measures power? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
33. 33.True or false: current is measured in amperes (A). (a) True (b) False
34. 34.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
35. 35.📏 How many amperes (A) is 430 mA? =
36. 36.📏 In the water-pipe picture of a circuit, resistance is like … (a) the water pressure (b) a narrow pipe (c) the flow of water (d) a bigger tank
37. 37.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
38. 38.📏 Which unit measures energy used each second? (a) volt (V) (b) ohm (Ω) (c) ampere (A) (d) watt (W)
39. 39.📏 How many watts (W) is 0.1 kW?
40. 40.📏 How many amperes (A) is 1030 mA? =

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