Hi @Ajay Baby
Is your camera built-in or an external device?
Is it normal for the camera to be used in other application?
At once we would like to suggest you to kindly try to turn off and on again Microsoft Teams application under Settings > Privacy > Camera option from operating system, try to see the result outcome.
Further, at once we would like to suggest you to kindly login to Teams from different machine, try to see if it makes any difference.
If you are using internal camera device for Teams, for best audio or video experience for the MS Teams, we would suggest you to kindly try to use certified and qualified USB audio or video devices for Teams and see if it makes any difference.
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