Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 796 · 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 kilo-ohms (kΩ) is 9300 Ω? =
2. 2.True or false: the flow of charge is measured in amperes (A). (a) False (b) True
3. 3.📏 How many milliamperes (mA) is 1.67 A?
4. 4.📏 How many milliamperes (mA) make 1 ampere? (a) 1000 (b) 100 (c) 10 (d) 60
5. 5.📏 Which unit measures voltage? (a) volt (V) (b) ohm (Ω) (c) watt (W) (d) ampere (A)
6. 6.True or false: the voltmeter measures current. (a) True (b) False
7. 7.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
8. 8.📏 Which unit measures energy used each second? (a) volt (V) (b) watt (W) (c) ampere (A) (d) ohm (Ω)
9. 9.📏 How many kilo-ohms (kΩ) is 5100 Ω? =
10. 10.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 10 (b) 1024 (c) 1000 (d) 100
11. 11.📏 In the water-pipe picture of a circuit, voltage is like … (a) the tap handle (b) the pipe colour (c) the water tank lid (d) the water pressure
12. 12.📏 In the water-pipe picture of a circuit, resistance is like … (a) a bigger tank (b) a narrow pipe (c) the water pressure (d) the flow of water
13. 13.Which of these is measured in watts (W)? (a) current (b) how much a part resists (c) power (d) resistance
14. 14.True or false: power is measured in volts (V). (a) True (b) False
15. 15.True or false: resistance is measured in ohms (Ω). (a) False (b) True
16. 16.📏 How many milliamperes (mA) is 0.54 A?
17. 17.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
18. 18.📏 In the water-pipe picture of a circuit, current is like … (a) the pipe colour (b) the flow of water (c) the water pressure (d) a narrow pipe
19. 19.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
20. 20.📏 Which unit measures the flow of charge? (a) volt (V) (b) watt (W) (c) ohm (Ω) (d) ampere (A)
21. 21.True or false: power is measured in watts (W). (a) False (b) True
22. 22.True or false: the ammeter is joined in series. (a) False (b) True
23. 23.📏 Which unit measures power? (a) volt (V) (b) ohm (Ω) (c) ampere (A) (d) watt (W)
24. 24.Which of these is measured in volts (V)? (a) energy used each second (b) voltage (c) resistance (d) how much a part resists
25. 25.True or false: the voltmeter measures voltage. (a) False (b) True
26. 26.True or false: the voltmeter is joined across a part. (a) False (b) True
27. 27.📏 How many amperes (A) is 2680 mA? =
28. 28.True or false: the flow of charge is measured in watts (W). (a) True (b) False
29. 29.True or false: energy used each second is measured in ohms (Ω). (a) True (b) False
30. 30.Which of these is measured in amperes (A)? (a) power (b) current (c) how much a part resists (d) voltage
31. 31.True or false: the ammeter is joined across a part. (a) False (b) True
32. 32.📏 How many ohms (Ω) is 7.9 kΩ?
33. 33.True or false: the ammeter measures voltage. (a) False (b) True
34. 34.📏 How many kilowatts (kW) is 2200 W? =
35. 35.True or false: energy used each second is measured in amperes (A). (a) False (b) True
36. 36.Which of these is measured in ohms (Ω)? (a) the flow of charge (b) energy used each second (c) resistance (d) voltage
37. 37.📏 How many milliamperes (mA) is 1.39 A?
38. 38.True or false: energy used each second is measured in watts (W). (a) True (b) False
39. 39.📏 How many watts (W) is 3.8 kW?
40. 40.📏 How many ohms (Ω) is 3.5 kΩ?

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