Electric Charges and Fields — Physics STD 12 Science — Question

Find the average magnitude of linear momentum of a helium molecule in a sample of helium gas at 0°C. Mass of a helium molecule = 6.64 × 10^-27kg nd Boltzmann constant = 1.38 × 10^-23JK^-1.

A convex lens of focal length f₁ is kept in contact with a concave lens of focal length f₂. Find the focal length of the combination.

Deduce the expression for the magnetic dipole moment of an electron orbiting around the central nucleus.

Discuss induced emf produced in a conducting rod during its motion in direction perpendicular to uniform magnetic field with reference to Lorentz force and obtain its expression.

Write (or mention) the achievements of Maxwell's Electro Magnetic wave theory and Hertz's experiment.

By what percent will the capacitance of a spherical conductor increase if the amount of charge on a spherical conductor is tripled?

At noon, the sun and the earth pull the objects on the earth's surface in opposite directions. At midnight the sun and the earth pull these objects in same direction. Is the weight of an object, as measured by a spring balance on the earth's surface, more at midnight as compared to its weight at noon?

Give the information about charge and atomic number of the nucleus.

Use the mirror equation to show that an object placed between f and 2f of a concave mirror forms an image beyond 2f.