CBSE 12th Previous Year Question Papers

Apart from class 10th class 12th is also considered a turning point in student’s life. This stage forms a basement for their higher studies. Apart from their study materials, students can download and use these previous year question papers while preparing for their exams.

CBSE class 12 previous year question papers available on Byju’s website are designed by the subject experts mainly based on the latest CBSE Class 12 Syllabus and marking scheme. By solving more number of previous year question papers, students not only gain the exact idea about the question paper, it helps students in learning how much time to allow for each question and also removes the exam phobia by improving their confident skills.

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Practise This Question

The work function for tungsten and sodium are 4.5 eV and 2.3 eV respectively. If the threshold wavelength λ  for sodium is 5460A the value of λ for tungsten is