JEE MainPhysicsElectronic DevicesMCQ+4 / −1
Statement - I : To get a steady dc output from the pulsating voltage received from a full wave rectifier we can connect a capacitor across the output parallel to the load RL. Statement - II : To get a steady dc output from the pulsating voltage received from a full wave rectifier we can connect an inductor in series with RL. In the light of the above statements, choose the most appropriate answer from the options given below :
- AStatement I is true but Statement II is false
- BStatement I is false but Statement II is true
- CBoth Statement I and Statement II are false
- DBoth Statement I and Statement II are true
View written solutionFree
Correct answer: D
- Understand the question
A full-wave rectifier gives a pulsating DC output. To make it more steady, we use filters.
We must check whether the two given methods help in smoothing the output.
- Check Statement I
Statement I says:
We can connect a capacitor across the output, parallel to the load .
This is correct.
- A capacitor filter is commonly connected in parallel with the load.
- The capacitor charges when the rectifier output rises and discharges through the load when the output falls.
- This reduces ripple and makes the output more nearly steady DC.
So, Statement I is true.
- Check Statement II
Statement II says:
We can connect an inductor in series with .
This is also correct.
- An inductor opposes changes in current.
- Since rectifier output current varies with time, the inductor smooths these variations.
- Therefore, placing an inductor in series with the load helps produce a steadier DC output.
So, Statement II is true.
- Choose the correct option
Since both statements are true, the correct option is:
- Compare with stored correct answer
Stored correct answer:
Our derived answer:
They match.
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