Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 418 · 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) is 2.65 A?
2. 2.📏 Which unit measures the push of a cell? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
3. 3.True or false: the ammeter is joined across a part. (a) False (b) True
4. 4.True or false: the voltmeter measures voltage. (a) False (b) True
5. 5.📏 How many watts (W) is 5 kW?
6. 6.📏 How many kilowatts (kW) is 350 W? =
7. 7.📏 How many watts (W) is 1.3 kW?
8. 8.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1024 (b) 1000 (c) 100 (d) 10
9. 9.True or false: the ammeter measures current. (a) False (b) True
10. 10.📏 In the water-pipe picture of a circuit, resistance is like … (a) the water pressure (b) the flow of water (c) a bigger tank (d) a narrow pipe
11. 11.Which of these is measured in volts (V)? (a) resistance (b) voltage (c) the flow of charge (d) energy used each second
12. 12.Which of these is measured in amperes (A)? (a) energy used each second (b) voltage (c) resistance (d) current
13. 13.📏 How many watts (W) is 4.2 kW?
14. 14.📏 How many kilowatts (kW) is 3700 W? =
15. 15.Which of these is measured in ohms (Ω)? (a) current (b) the flow of charge (c) energy used each second (d) how much a part resists
16. 16.True or false: power is measured in watts (W). (a) True (b) False
17. 17.📏 Which unit measures energy used each second? (a) ohm (Ω) (b) volt (V) (c) ampere (A) (d) watt (W)
18. 18.📏 How many kilo-ohms (kΩ) is 8300 Ω? =
19. 19.📏 Which unit measures how much a part resists? (a) volt (V) (b) watt (W) (c) ohm (Ω) (d) ampere (A)
20. 20.True or false: resistance is measured in volts (V). (a) True (b) False
21. 21.📏 How many milliamperes (mA) is 1.17 A?
22. 22.True or false: the push of a cell is measured in volts (V). (a) True (b) False
23. 23.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water tank lid (b) the water pressure (c) the tap handle (d) the pipe colour
24. 24.📏 How many amperes (A) is 840 mA? =
25. 25.📏 How many milliamperes (mA) is 1.82 A?
26. 26.Which of these is measured in amperes (A)? (a) how much a part resists (b) the push of a cell (c) resistance (d) the flow of charge
27. 27.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
28. 28.📏 How many watts (W) is 4.5 kW?
29. 29.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
30. 30.📏 How many milliamperes (mA) is 0.99 A?
31. 31.True or false: energy used each second is measured in watts (W). (a) False (b) True
32. 32.📏 How many milliamperes (mA) make 1 ampere? (a) 10 (b) 100 (c) 60 (d) 1000
33. 33.📏 How many ohms (Ω) is 0.4 kΩ?
34. 34.📏 Which unit measures resistance? (a) ohm (Ω) (b) ampere (A) (c) watt (W) (d) volt (V)
35. 35.Which of these is measured in ohms (Ω)? (a) the flow of charge (b) resistance (c) current (d) voltage
36. 36.📏 In the water-pipe picture of a circuit, current is like … (a) the flow of water (b) the pipe colour (c) the water pressure (d) a narrow pipe
37. 37.True or false: the voltmeter is joined in series. (a) False (b) True
38. 38.Which of these is measured in watts (W)? (a) how much a part resists (b) energy used each second (c) resistance (d) the push of a cell
39. 39.Which of these is measured in watts (W)? (a) resistance (b) the flow of charge (c) power (d) the push of a cell
40. 40.📏 How many kilo-ohms (kΩ) is 3200 Ω? =

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