HSC Science कक्षा १२ - Tamil Nadu Board of Secondary Education Question Bank Solutions

Discuss about astronomical telescope.

Mention different parts of the spectrometer.

Explain the preliminary adjustments of the spectrometer.

Explain the experimental determination of the material of the prism using a spectrometer.

A compound microscope has a magnification of 30. The focal length of eye piece is 5 cm. Assuming the final image to be at least distance of distinct vision, find the magnification produced by the objective.

A compound microscope has a magnifying power of 100 when the image is formed at infinity. The objective has a focal length of 0.5 cm and the tube length is 6.5 cm. What is the focal length of the eyepiece.

Explain in detail the four fundamental forces in nature.

Briefly explain the elementary particles present in nature.

The near point and the far point for a person are 50 cm and 500 cm, respectively. Calculate the power of the lens the person should wear to read a book held in hand at 25 cm. What maximum distance is clearly visible for the person with this lens on the eye?

Fiber optic communication is gaining popularity among the various transmission media. - justify

Give applications of RADAR.

What does RADAR stand for?

What is mobile communication?

The mature sperms are stored in the ____________.

The male homologue of the female clitoris is ____________.

What is inhibin?

Mention the importance of the position of the testes in humans.

What is the composition of semen?

The first life on earth originated ____________.

List out the major gases that seem to be found in the primitive earth.