Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 208 · 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 unit measures how much a part resists? (a) ampere (A) (b) volt (V) (c) ohm (Ω) (d) watt (W)
2. 2.Which of these is measured in amperes (A)? (a) resistance (b) the push of a cell (c) current (d) how much a part resists
3. 3.📏 How many watts (W) is 4.7 kW?
4. 4.📏 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
5. 5.📏 Which unit measures current? (a) volt (V) (b) watt (W) (c) ampere (A) (d) ohm (Ω)
6. 6.True or false: the voltmeter measures voltage. (a) False (b) True
7. 7.Which of these is measured in volts (V)? (a) resistance (b) voltage (c) power (d) the flow of charge
8. 8.True or false: voltage is measured in amperes (A). (a) True (b) False
9. 9.📏 How many amperes (A) is 140 mA? =
10. 10.True or false: the push of a cell is measured in ohms (Ω). (a) False (b) True
11. 11.📏 How many milliamperes (mA) make 1 ampere? (a) 10 (b) 60 (c) 100 (d) 1000
12. 12.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 10 (b) 100 (c) 1024 (d) 1000
13. 13.📏 How many kilo-ohms (kΩ) is 100 Ω? =
14. 14.📏 How many watts (W) is 1.3 kW?
15. 15.📏 In the water-pipe picture of a circuit, current is like … (a) a narrow pipe (b) the flow of water (c) the pipe colour (d) the water pressure
16. 16.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
17. 17.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
18. 18.📏 How many milliamperes (mA) is 1.51 A?
19. 19.📏 How many kilo-ohms (kΩ) is 1300 Ω? =
20. 20.📏 Which unit measures voltage? (a) watt (W) (b) ohm (Ω) (c) ampere (A) (d) volt (V)
21. 21.📏 How many kilowatts (kW) is 450 W? =
22. 22.Which of these is measured in ohms (Ω)? (a) the flow of charge (b) how much a part resists (c) power (d) energy used each second
23. 23.True or false: current is measured in amperes (A). (a) False (b) True
24. 24.📏 Which unit measures the push of a cell? (a) volt (V) (b) ohm (Ω) (c) watt (W) (d) ampere (A)
25. 25.📏 In the water-pipe picture of a circuit, resistance is like … (a) a narrow pipe (b) the water pressure (c) the flow of water (d) a bigger tank
26. 26.True or false: power is measured in watts (W). (a) True (b) False
27. 27.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
28. 28.📏 How many kilo-ohms (kΩ) is 8100 Ω? =
29. 29.📏 How many kilowatts (kW) is 4950 W? =
30. 30.True or false: the ammeter is joined in series. (a) False (b) True
31. 31.True or false: the ammeter is joined across a part. (a) True (b) False
32. 32.True or false: the voltmeter measures current. (a) False (b) True
33. 33.📏 How many milliamperes (mA) is 2.96 A?
34. 34.📏 How many kilo-ohms (kΩ) is 1800 Ω? =
35. 35.📏 How many milliamperes (mA) is 1.38 A?
36. 36.True or false: the voltmeter is joined across a part. (a) True (b) False
37. 37.Which of these is measured in watts (W)? (a) power (b) the flow of charge (c) resistance (d) current
38. 38.📏 How many ohms (Ω) is 7.9 kΩ?
39. 39.Which of these is measured in ohms (Ω)? (a) the push of a cell (b) voltage (c) resistance (d) power
40. 40.📏 How many amperes (A) is 1240 mA? =

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