Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 143 · 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 milliamperes (mA) make 1 ampere? (a) 100 (b) 10 (c) 60 (d) 1000
2. 2.True or false: the ammeter measures voltage. (a) True (b) False
3. 3.📏 Which unit measures how much a part resists? (a) watt (W) (b) ohm (Ω) (c) volt (V) (d) ampere (A)
4. 4.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
5. 5.True or false: the flow of charge is measured in volts (V). (a) True (b) False
6. 6.True or false: power is measured in watts (W). (a) False (b) True
7. 7.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
8. 8.📏 Which unit measures resistance? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
9. 9.Which of these is measured in watts (W)? (a) power (b) the push of a cell (c) the flow of charge (d) how much a part resists
10. 10.📏 In the water-pipe picture of a circuit, resistance is like … (a) the flow of water (b) a bigger tank (c) a narrow pipe (d) the water pressure
11. 11.📏 Which unit measures the flow of charge? (a) volt (V) (b) watt (W) (c) ohm (Ω) (d) ampere (A)
12. 12.📏 How many kilowatts (kW) is 2050 W? =
13. 13.True or false: how much a part resists is measured in amperes (A). (a) True (b) False
14. 14.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
15. 15.True or false: current is measured in amperes (A). (a) True (b) False
16. 16.📏 In the water-pipe picture of a circuit, current is like … (a) the pipe colour (b) the flow of water (c) a narrow pipe (d) the water pressure
17. 17.📏 How many kilo-ohms (kΩ) is 4900 Ω? =
18. 18.Which of these is measured in ohms (Ω)? (a) the push of a cell (b) current (c) how much a part resists (d) energy used each second
19. 19.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1000 (b) 1024 (c) 100 (d) 10
20. 20.Which of these is measured in amperes (A)? (a) the flow of charge (b) power (c) how much a part resists (d) voltage
21. 21.True or false: the voltmeter is joined in series. (a) True (b) False
22. 22.📏 In the water-pipe picture of a circuit, voltage is like … (a) the tap handle (b) the water tank lid (c) the pipe colour (d) the water pressure
23. 23.📏 How many amperes (A) is 2560 mA? =
24. 24.📏 How many ohms (Ω) is 0.5 kΩ?
25. 25.📏 How many ohms (Ω) is 8.6 kΩ?
26. 26.Which of these is measured in volts (V)? (a) current (b) the push of a cell (c) power (d) resistance
27. 27.📏 How many milliamperes (mA) is 0.05 A?
28. 28.True or false: voltage is measured in ohms (Ω). (a) False (b) True
29. 29.📏 How many milliamperes (mA) is 0.42 A?
30. 30.True or false: the voltmeter measures current. (a) True (b) False
31. 31.True or false: the voltmeter is joined across a part. (a) False (b) True
32. 32.📏 Which unit measures energy used each second? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
33. 33.📏 How many amperes (A) is 1290 mA? =
34. 34.📏 How many milliamperes (mA) is 1.21 A?
35. 35.True or false: the flow of charge is measured in amperes (A). (a) True (b) False
36. 36.📏 How many ohms (Ω) is 5.6 kΩ?
37. 37.📏 Which unit measures the push of a cell? (a) ohm (Ω) (b) volt (V) (c) ampere (A) (d) watt (W)
38. 38.True or false: the ammeter is joined across a part. (a) True (b) False
39. 39.True or false: the ammeter measures current. (a) True (b) False
40. 40.📏 How many kilowatts (kW) is 550 W? =

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