CBSE Class 12   CBSE Class 12 Physics


Topic Replies Activity
Consider a two slit interference arrangement (shown in figure) such that the distance of the screen from the slits is half the distance between the slits 3 February 19, 2017
You are given two converging lenses of focal length 1.25 cm 3 February 18, 2017
A concave mirror of small aperture forms a sharper image. Why? 1 December 12, 2016
Suppose while sitting in a parked car 2 December 12, 2016
When monochromatic light travels from a rarer to a denser medium, explain the following, giving reasons 2 December 12, 2016
You have learnt that plane and convex mirrors produce virtual images of objects. Can they produce real images under some circumstances? Explain 2 December 12, 2016
The image obtained with a convex lens is erect 2 December 12, 2016
A convex lens of focal length 30 cm is placed coaxially with a convex mirror of radius of curvature 20 cm 2 December 12, 2016
Figure shows an equiconvex lens 2 December 12, 2016
A screen is placed 90 cm from an object 2 December 12, 2016
The near vision of an average person is 25 cm 2 December 12, 2016
You are given prisms made of crown glass and flint glass with a wide variety of angles 2 December 12, 2016
A man with normal near point (25 cm) reads a book with small print using a magnifying glass 2 December 12, 2016
A small telescope has an objective lens of focal length 140 cm 2 December 12, 2016
An astronomical telescope uses two lenses of power 10 D and ID. What is its magnifying power in normal adjustment? 1 December 12, 2016
The objective of an astronomical telescope 2 December 12, 2016
How is the working of telescope different 2 December 12, 2016
Calculate the value of R in the balance condition of the Wheatstone bridge 2 December 12, 2016
Write two possible causes for one sided deflection in a potentiometer experiment 1 December 12, 2016
Why are the connections between the resistors in a meter bridge made of thick copper strips? 2 December 12, 2016
Determine the current in each branch of the following network 2 December 12, 2016
AB is a potentiometer wire as shown in figure 2 December 12, 2016
In the meter bridge experiment, the balance point 2 December 12, 2016
Six lead-acid type of secondary cells each of emf 2 V 2 December 12, 2016
Write any two factors on which internal resistance of a cell depends 2 December 12, 2016
First a set of n equal resistors of R 2 December 12, 2016
When is more power delivered to a light bulb 2 December 12, 2016
Power P is to be delivered to a device via transmission cables 2 December 12, 2016
Write two characteristics of manganin which make it suitable for making standard resistances 1 December 12, 2016
Two conductors are made of the same material 2 December 12, 2016