Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 770 · 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 ammeter measures current. (a) False (b) True
2. 2.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
3. 3.Which of these is measured in watts (W)? (a) the push of a cell (b) resistance (c) the flow of charge (d) power
4. 4.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
5. 5.📏 In the water-pipe picture of a circuit, voltage is like … (a) the tap handle (b) the pipe colour (c) the water pressure (d) the water tank lid
6. 6.📏 Which unit measures how much a part resists? (a) watt (W) (b) ampere (A) (c) volt (V) (d) ohm (Ω)
7. 7.📏 In the water-pipe picture of a circuit, resistance is like … (a) the water pressure (b) a bigger tank (c) a narrow pipe (d) the flow of water
8. 8.📏 How many watts (W) is 1.9 kW?
9. 9.True or false: how much a part resists is measured in ohms (Ω). (a) False (b) True
10. 10.📏 Which unit measures resistance? (a) watt (W) (b) volt (V) (c) ohm (Ω) (d) ampere (A)
11. 11.📏 Which unit measures voltage? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
12. 12.True or false: how much a part resists is measured in watts (W). (a) False (b) True
13. 13.True or false: voltage is measured in volts (V). (a) False (b) True
14. 14.📏 Which unit measures current? (a) volt (V) (b) watt (W) (c) ampere (A) (d) ohm (Ω)
15. 15.📏 Which unit measures energy used each second? (a) ohm (Ω) (b) ampere (A) (c) volt (V) (d) watt (W)
16. 16.Which of these is measured in volts (V)? (a) resistance (b) the flow of charge (c) power (d) voltage
17. 17.📏 How many kilo-ohms (kΩ) is 7500 Ω? =
18. 18.📏 How many kilowatts (kW) is 600 W? =
19. 19.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1024 (b) 100 (c) 1000 (d) 10
20. 20.📏 How many milliamperes (mA) is 0.18 A?
21. 21.📏 How many milliamperes (mA) is 2.42 A?
22. 22.True or false: current is measured in amperes (A). (a) False (b) True
23. 23.📏 How many milliamperes (mA) is 1.11 A?
24. 24.True or false: the voltmeter is joined in series. (a) False (b) True
25. 25.📏 How many amperes (A) is 390 mA? =
26. 26.True or false: the ammeter is joined in series. (a) False (b) True
27. 27.📏 How many kilowatts (kW) is 1450 W? =
28. 28.Which of these is measured in ohms (Ω)? (a) voltage (b) the flow of charge (c) current (d) how much a part resists
29. 29.📏 Which unit measures the flow of charge? (a) watt (W) (b) ampere (A) (c) volt (V) (d) ohm (Ω)
30. 30.📏 Which unit measures power? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
31. 31.True or false: the ammeter is joined across a part. (a) True (b) False
32. 32.📏 How many milliamperes (mA) is 0.86 A?
33. 33.📏 In the water-pipe picture of a circuit, current is like … (a) the pipe colour (b) a narrow pipe (c) the water pressure (d) the flow of water
34. 34.📏 How many milliamperes (mA) is 2.35 A?
35. 35.📏 How many amperes (A) is 2420 mA? =
36. 36.📏 How many milliamperes (mA) make 1 ampere? (a) 100 (b) 10 (c) 60 (d) 1000
37. 37.📏 How many ohms (Ω) is 1.4 kΩ?
38. 38.📏 How many milliamperes (mA) is 0.53 A?
39. 39.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
40. 40.📏 How many kilowatts (kW) is 1600 W? =

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