Ray Optics and Optical Instruments — Physics STD 12 Science — Question

NaCl molecule is bound due to the electric force between the sodium and the chlorine ions when one electron. of sodium is transferred to chlorine. Taking the separation between the ions to be 2.75 × 10cm, find the force of attraction between them· State the assumptions (if any) that you have made.

Write two differences between charge and mass.

What is the magnification in this case?

Why, some definite lines of atomic spectrum of matter is obtained?

An electron is not deflected while passing through a uniform magnetic field. What is the direction of magnetic field?

Write the names of nuclear chain reactions.

Name the crystal structure of intrinsic semiconductor.

At an airport, a person is made to walk through the doorway of a metal detector, for security reasons. If she/he is carrying anything made of metal, the metal detector emits a sound. On what principle does this detector work?

When monochromatic light travels from one medium to another its wavelength changes but frequency remains the same, Explain.