Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 191 · 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 the push of a cell? (a) ohm (Ω) (b) volt (V) (c) watt (W) (d) ampere (A)
2. 2.📏 How many ohms (Ω) is 2.5 kΩ?
3. 3.True or false: the voltmeter is joined in series. (a) True (b) False
4. 4.True or false: how much a part resists is measured in volts (V). (a) False (b) True
5. 5.📏 In the water-pipe picture of a circuit, current is like … (a) the water pressure (b) a narrow pipe (c) the pipe colour (d) the flow of water
6. 6.📏 How many ohms (Ω) is 5.9 kΩ?
7. 7.True or false: resistance is measured in ohms (Ω). (a) False (b) True
8. 8.📏 Which unit measures power? (a) volt (V) (b) watt (W) (c) ohm (Ω) (d) ampere (A)
9. 9.📏 Which unit measures current? (a) watt (W) (b) ohm (Ω) (c) ampere (A) (d) volt (V)
10. 10.📏 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
11. 11.Which of these is measured in watts (W)? (a) the flow of charge (b) power (c) how much a part resists (d) current
12. 12.Which of these is measured in amperes (A)? (a) the push of a cell (b) voltage (c) power (d) the flow of charge
13. 13.📏 How many milliamperes (mA) is 1.63 A?
14. 14.📏 Which unit measures energy used each second? (a) volt (V) (b) watt (W) (c) ampere (A) (d) ohm (Ω)
15. 15.True or false: the ammeter measures voltage. (a) False (b) True
16. 16.True or false: the voltmeter measures voltage. (a) True (b) False
17. 17.True or false: the ammeter is joined across a part. (a) True (b) False
18. 18.📏 Which unit measures resistance? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
19. 19.📏 In the water-pipe picture of a circuit, resistance is like … (a) the flow of water (b) a bigger tank (c) the water pressure (d) a narrow pipe
20. 20.Which of these is measured in ohms (Ω)? (a) energy used each second (b) current (c) the flow of charge (d) resistance
21. 21.📏 How many amperes (A) is 1900 mA? =
22. 22.📏 How many kilowatts (kW) is 450 W? =
23. 23.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
24. 24.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
25. 25.📏 Which unit measures how much a part resists? (a) volt (V) (b) ohm (Ω) (c) watt (W) (d) ampere (A)
26. 26.📏 How many watts (W) is 1.7 kW?
27. 27.📏 How many ohms (Ω) is 3.3 kΩ?
28. 28.📏 How many amperes (A) is 1430 mA? =
29. 29.📏 How many milliamperes (mA) is 0.54 A?
30. 30.Which of these is measured in ohms (Ω)? (a) how much a part resists (b) the flow of charge (c) power (d) voltage
31. 31.True or false: the voltmeter is joined across a part. (a) False (b) True
32. 32.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
33. 33.📏 How many milliamperes (mA) is 0.29 A?
34. 34.True or false: resistance is measured in volts (V). (a) True (b) False
35. 35.True or false: the flow of charge is measured in amperes (A). (a) True (b) False
36. 36.📏 How many kilo-ohms (kΩ) is 1600 Ω? =
37. 37.📏 How many watts (W) is 3.5 kW?
38. 38.📏 How many milliamperes (mA) make 1 ampere? (a) 10 (b) 100 (c) 1000 (d) 60
39. 39.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
40. 40.True or false: the ammeter measures current. (a) True (b) False

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