## A Question from Optics

In method of determining refractive index of transparent liquid with help of convex lens and plane mirror ,an equi double convex lens of refractive index 1.5 has been taken…. Sir plzzzz tell what is the relation for refractive index of liquid of convex lens and that of combination   Can you answer?

## Rotational Mechanics – HC Verma’s Concepts of Physics – Solution

HC Verma’s Concepts of Physics – Chapter 10 – Question 15 Find the moment of inertia of a uniform square plate of mass m and edge a about one of its diagonals. The question was posted by Ankit Solution: Let the moment of inertia about the axis through the centre of the square plate perpendicular to the plane, assumed to be along…… Continue reading Rotational Mechanics – HC Verma’s Concepts of Physics – Solution

## If gravitation suddenly stops?!

If gravitation suddenly stops …… neglecting the rotation … if someone is standing on ground ….. will the normal reaction disappear?? If yes why? I want to know when does normal reaction acts on a body? and in the absence of weight why would it disappear? (Ahwan Abhinandan Joshi asks)

## Revision questions for class XI

Motion & Laws of motion PROPERTIES OF MATTER work rotation gravitation HEAT OSCILLATIONS WAVES

## Question from Rotational Dynamics

Dyana Asked: A small rubber wheel is used to drive a large pottery wheel. The two wheels are mounted so that their circular edges touch. The small wheel has a radius of 3.5 cm and accelerates at the rate of 7.9 rad/s^2, and it is in contact with the pottery wheel (radius 23.0 cm) without…… Continue reading Question from Rotational Dynamics