Notes and Study material for Exams
The photoelectric effect The photoelectric effect is the emission, or ejection, of electrons from the surface of, generally, a Metal in response to incident Light.A material that can exhibit The photoelectric effect is said to be photoemissive, and the ejected electrons are called photoelectrons. The process was discovered by Heinrich Hertz in 1887. Attempts to … Read more
Ray Optics The wave model of Light has one serious drawback, though: Unlike other wave phenomena such as Sound, or surface waves, it wasn‟t clear what the medium was that supported light waves. Giving it a name – the “luminiferous aether” – didn‟t help. James Clerk Maxwell‟s (1831 – 1879) theory of electromagnetism, however, showed … Read more
Moving Charge and Magnetism Magnetism is a phenomenon produced by the motion of electric charge, which results in attractive and repulsive forces between objects. A magnet is any piece of material that has the property of attracting iron (or steel). Magnetite, also known as lodestone, is a naturally occurring rock that is a magnet. This … Read more
Waves A wave can be described as a disturbance that travels through a medium from one location to another location.It is a disturbance or variation that transfers energy progressively from point to point. It may take the form of an elastic deformation, a variation of pressure, electric or magnetic intensity, electric potential, or temperature. When … Read more
Rotational Motion A rotation is a circular movement of an object around a center (or point) of rotation . A three-dimensional object always rotates around an imaginary line called a rotation axis. If the axis passes through the body’s center of mass, the body is said to rotate upon itself, or spin. A rigid body … Read more
Work energy and power Work is said to be done when a force applied on the body displaces the body through a certain distance in the direction of force.Mathematically, work is the force-displacement product (for those of you who prefer algebra) W = F x s cos a or the force-displacement path integral (for those … Read more
Motion Motion is a change in position of an object with respect to time. Motion is typically described in terms of displacement, distance, velocity, acceleration, time and speed. The branch of physics which deals with the study of motion of material objects is called mechanics. Mechanics is divided into following branches. (i) Statics : Statics … Read more
The Govt. of India Act Gave assurance that there would be no more territorial possessions. Titles were 1858 bestowed on many princes & the right of adoption was accepted. No interference in religious matters. The Indian Council Provided that there was no difference between the central & provincial Act 1861 subjects. … Read more
I wish for a peaceful term of India. I cannot forget that in the sky of India , Lord Canning serene as it is, a small cloud may arise ………..threaten to burst & overwhelm. ‘a battle of blacks against the whites’ (on 1857 revolt) J.W. Kaye The war which began for … Read more
Rajaram Mohun Laid Stress on the study of English & established the Hindu College in Calcutta Roy alongwith David Hare. Maharishi The grandfather of Rabindranath Tagore. He inspired a number of thinkers like Devendranath Ishwar Chandra Vidyasagar & Akshay Kumar Datta who became Brahmo Samaj Tagore members. … Read more