Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 489 · 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 ohms (Ω) is 1.8 kΩ?
2. 2.📏 How many amperes (A) is 790 mA? =
3. 3.📏 How many amperes (A) is 190 mA? =
4. 4.True or false: the ammeter measures current. (a) True (b) False
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.📏 How many milliamperes (mA) make 1 ampere? (a) 1000 (b) 100 (c) 60 (d) 10
7. 7.📏 Which unit measures how much a part resists? (a) watt (W) (b) ampere (A) (c) ohm (Ω) (d) volt (V)
8. 8.📏 How many milliamperes (mA) is 0.15 A?
9. 9.📏 How many kilowatts (kW) is 200 W? =
10. 10.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
11. 11.True or false: energy used each second is measured in ohms (Ω). (a) True (b) False
12. 12.Which of these is measured in amperes (A)? (a) resistance (b) energy used each second (c) the flow of charge (d) power
13. 13.Which of these is measured in volts (V)? (a) energy used each second (b) how much a part resists (c) resistance (d) the push of a cell
14. 14.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
15. 15.📏 How many milliamperes (mA) is 0.2 A?
16. 16.True or false: the ammeter measures voltage. (a) False (b) True
17. 17.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1024 (b) 10 (c) 1000 (d) 100
18. 18.True or false: the ammeter is joined in series. (a) False (b) True
19. 19.📏 How many milliamperes (mA) is 0.33 A?
20. 20.📏 Which unit measures power? (a) watt (W) (b) volt (V) (c) ampere (A) (d) ohm (Ω)
21. 21.Which of these is measured in amperes (A)? (a) current (b) power (c) the push of a cell (d) voltage
22. 22.📏 How many ohms (Ω) is 0.2 kΩ?
23. 23.📏 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
24. 24.True or false: the voltmeter measures voltage. (a) False (b) True
25. 25.📏 How many ohms (Ω) is 4.9 kΩ?
26. 26.📏 How many amperes (A) is 400 mA? =
27. 27.📏 How many watts (W) is 0.1 kW?
28. 28.📏 How many kilo-ohms (kΩ) is 6200 Ω? =
29. 29.True or false: the ammeter is joined across a part. (a) False (b) True
30. 30.Which of these is measured in ohms (Ω)? (a) the push of a cell (b) voltage (c) energy used each second (d) how much a part resists
31. 31.📏 Which unit measures the flow of charge? (a) volt (V) (b) ohm (Ω) (c) ampere (A) (d) watt (W)
32. 32.📏 In the water-pipe picture of a circuit, resistance is like … (a) the water pressure (b) the flow of water (c) a bigger tank (d) a narrow pipe
33. 33.Which of these is measured in watts (W)? (a) energy used each second (b) resistance (c) current (d) the push of a cell
34. 34.True or false: the voltmeter measures current. (a) False (b) True
35. 35.True or false: the push of a cell is measured in volts (V). (a) True (b) False
36. 36.📏 Which unit measures resistance? (a) ampere (A) (b) volt (V) (c) ohm (Ω) (d) watt (W)
37. 37.📏 How many milliamperes (mA) is 1.6 A?
38. 38.📏 Which unit measures current? (a) ohm (Ω) (b) watt (W) (c) volt (V) (d) ampere (A)
39. 39.True or false: the flow of charge is measured in amperes (A). (a) True (b) False
40. 40.📏 How many watts (W) is 2.7 kW?

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