Hello

As you have not provided your board details, I am attaching a link for your reference.

BIHAR BOARD ANSWER KEY CLASS 11 , similarly, you can type your state name and can get the answersheet accordingly.

Also, you can get the Class 11 half-yearly 2025 Physics answer key from your school.
Most schools prepare their own question papers and answers.
You can also check your state board’s official website.