CBSE Class 12 Physics Question Paper Solved 2019 Set F

CBSE Class 12 Physics Question Paper Solved 2019 Set F. Students can download the last year board exams question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in examinations.

1. The magnetic susceptibility of magnesium at 300 K is 1·2 ×10⁵. At what temperature will its magnetic susceptibility become 1·44× 10⁵ ?

2. Draw a pattern of electric field lines due to two positive charges placed a distance d apart.

3. Which part of the electromagnetic spectrum is used in RADAR ? Give its frequency range.

OR

How are electromagnetic waves produced by accelerating charges ?

4. When a charge q is moving in the presence of electric (E) and magnetic (B) fields which are perpendicular to each other and also perpendicular to the velocity v of the particle, write the relation expressing v in terms of E and B.

5. Draw the I-V characteristics of a Zener diode.

6. State, with the help of a ray diagram, the working principle of optical fibres. Write one important use of optical fibres.

7. A photon emitted during the de-excitation of electron from a state n to the first excited state in a hydrogen atom, irradiates a metallic cathode of work function 2 eV, in a photo cell, with a stopping potential of 0·55 V. Obtain the value of the quantum number of the state n.

OR

A hydrogen atom in the ground state is excited by an electron beam of 12·5 eV energy. Find out the maximum number of lines emitted by the atom from its excited state.

Please click the link below to download pdf file of CBSE Class 12 Physics Question Paper Solved 2019 Set F.