Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 40 · 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) current (b) how much a part resists (c) energy used each second (d) the flow of charge
2. 2.📏 How many milliamperes (mA) is 2.06 A?
3. 3.📏 Which unit measures power? (a) ampere (A) (b) ohm (Ω) (c) volt (V) (d) watt (W)
4. 4.📏 Which unit measures the push of a cell? (a) ohm (Ω) (b) volt (V) (c) ampere (A) (d) watt (W)
5. 5.Which of these is measured in amperes (A)? (a) energy used each second (b) current (c) resistance (d) voltage
6. 6.True or false: the voltmeter measures current. (a) False (b) True
7. 7.True or false: energy used each second is measured in watts (W). (a) False (b) True
8. 8.📏 Which unit measures energy used each second? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
9. 9.True or false: the ammeter is joined in series. (a) False (b) True
10. 10.Which of these is measured in amperes (A)? (a) resistance (b) power (c) the push of a cell (d) the flow of charge
11. 11.📏 How many milliamperes (mA) make 1 ampere? (a) 100 (b) 60 (c) 1000 (d) 10
12. 12.📏 How many kilowatts (kW) is 1700 W? =
13. 13.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
14. 14.📏 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
15. 15.True or false: the ammeter is joined across a part. (a) False (b) True
16. 16.📏 How many milliamperes (mA) is 1.95 A?
17. 17.📏 How many milliamperes (mA) is 1.35 A?
18. 18.True or false: the ammeter measures voltage. (a) False (b) True
19. 19.True or false: the voltmeter is joined across a part. (a) False (b) True
20. 20.True or false: power is measured in volts (V). (a) False (b) True
21. 21.📏 How many kilo-ohms (kΩ) is 2500 Ω? =
22. 22.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
23. 23.📏 How many milliamperes (mA) is 2.84 A?
24. 24.Which of these is measured in watts (W)? (a) energy used each second (b) the flow of charge (c) the push of a cell (d) voltage
25. 25.True or false: resistance is measured in ohms (Ω). (a) True (b) False
26. 26.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1000 (b) 100 (c) 10 (d) 1024
27. 27.📏 How many watts (W) is 0.5 kW?
28. 28.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
29. 29.True or false: voltage is measured in watts (W). (a) False (b) True
30. 30.📏 Which unit measures how much a part resists? (a) ampere (A) (b) volt (V) (c) watt (W) (d) ohm (Ω)
31. 31.📏 How many amperes (A) is 3000 mA? =
32. 32.📏 How many kilo-ohms (kΩ) is 5100 Ω? =
33. 33.Which of these is measured in ohms (Ω)? (a) resistance (b) power (c) energy used each second (d) the flow of charge
34. 34.True or false: the push of a cell is measured in watts (W). (a) True (b) False
35. 35.📏 Which unit measures current? (a) watt (W) (b) ampere (A) (c) ohm (Ω) (d) volt (V)
36. 36.📏 How many kilowatts (kW) is 2250 W? =
37. 37.True or false: the voltmeter is joined in series. (a) True (b) False
38. 38.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
39. 39.📏 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
40. 40.📏 How many amperes (A) is 110 mA? =

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