Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 123 · 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 amperes (A) is 70 mA? =
2. 2.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
3. 3.📏 How many kilowatts (kW) is 3950 W? =
4. 4.📏 How many kilowatts (kW) is 5000 W? =
5. 5.📏 How many milliamperes (mA) is 2.23 A?
6. 6.True or false: how much a part resists is measured in ohms (Ω). (a) True (b) False
7. 7.📏 How many milliamperes (mA) make 1 ampere? (a) 60 (b) 1000 (c) 100 (d) 10
8. 8.Which of these is measured in amperes (A)? (a) how much a part resists (b) power (c) current (d) voltage
9. 9.📏 How many amperes (A) is 810 mA? =
10. 10.📏 How many kilowatts (kW) is 1050 W? =
11. 11.📏 Which unit measures resistance? (a) watt (W) (b) ampere (A) (c) volt (V) (d) ohm (Ω)
12. 12.Which of these is measured in volts (V)? (a) resistance (b) the push of a cell (c) how much a part resists (d) energy used each second
13. 13.📏 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
14. 14.True or false: the voltmeter measures current. (a) True (b) False
15. 15.Which of these is measured in ohms (Ω)? (a) the push of a cell (b) how much a part resists (c) voltage (d) power
16. 16.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
17. 17.📏 How many kilo-ohms (kΩ) is 100 Ω? =
18. 18.True or false: the ammeter measures current. (a) True (b) False
19. 19.📏 How many ohms (Ω) is 7.9 kΩ?
20. 20.📏 How many amperes (A) is 140 mA? =
21. 21.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
22. 22.True or false: the push of a cell is measured in volts (V). (a) True (b) False
23. 23.📏 Which unit measures how much a part resists? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
24. 24.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
25. 25.📏 How many milliamperes (mA) is 2.91 A?
26. 26.📏 Which unit measures the push of a cell? (a) watt (W) (b) volt (V) (c) ampere (A) (d) ohm (Ω)
27. 27.📏 How many watts (W) is 0.1 kW?
28. 28.📏 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
29. 29.Which of these is measured in watts (W)? (a) the push of a cell (b) energy used each second (c) the flow of charge (d) voltage
30. 30.True or false: resistance is measured in ohms (Ω). (a) True (b) False
31. 31.📏 How many milliamperes (mA) is 0.69 A?
32. 32.📏 How many milliamperes (mA) is 1.64 A?
33. 33.Which of these is measured in ohms (Ω)? (a) power (b) energy used each second (c) the flow of charge (d) resistance
34. 34.📏 Which unit measures current? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
35. 35.Which of these is measured in watts (W)? (a) the push of a cell (b) how much a part resists (c) current (d) power
36. 36.📏 How many kilowatts (kW) is 4000 W? =
37. 37.📏 In the water-pipe picture of a circuit, voltage is like … (a) the pipe colour (b) the water tank lid (c) the water pressure (d) the tap handle
38. 38.True or false: the ammeter measures voltage. (a) False (b) True
39. 39.True or false: the voltmeter is joined in series. (a) True (b) False
40. 40.Which of these is measured in amperes (A)? (a) power (b) the flow of charge (c) the push of a cell (d) resistance

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