Introduction of Stress The restoring force is developed inside the body when deforming force is applied on it. This restoring force per unit area of the body is known as stress. The restoring force is equal and opposite with deforming force. Therefore, stress may also be defined as the deforming force per unit area of … Read more
Introduction of GPS GPS is a satellite and ground based radio navigation system. It is also called locational system that helps user to determine very accurate locations mostly on the surface of the earth. The radio signals that are broadcasted by satellites are received by anyone who has a GPS device such as SatNav, mobile … Read more
Here, we present some of the MCQs related to physics that can be helpful for the students who are preparing for various medical subjects like MBBS, BDS, nursing, engineering and so on. 1. Which of the following pairs of physical quantities does not have same dimensional formula? work and torque angular momentum and Planck’s constant … Read more
Liquids just like solids expand on heating and contract on cooling. The expansion and contraction in liquids is more than those in solids. The reason for this is that the intermolecular force in liquids is less than that in solids. Hence, the molecules in a liquid vibrate more than the molecules in a solid when … Read more
Due to the heat radiations coming from the sun, a huge amount of water on the surface of the earth gets evaporated. When water evaporates, the water vapour moves up and gets mixed up with the atmosphere. Hence, the atmosphere consists of water vapours called humidity. The higher the amount of water vapours present in … Read more
The energy is a conserved quantity. There won’t be any change in the energy of an isolated system. The energy can neither be created nor can it be destroyed. It can only be changed from its one form to another form. For example: if we throw a stone upward with certain velocity, initially, it has … Read more
There are many examples of collisions occurring in our daily life. Some of the examples are: A person walking with his head down may collide with another person walking against him. A car or a vehicle may collide with another car or a vehicle in an accident. The billiard balls collides each other in a … Read more
The constituent particles (atoms or molecules) of a crystal are closely packed and held together by strong mutual force of attraction. This force which exists between different atoms of a crystalline solid is called binding forces. The property of a solid depends upon the nature of the binding forces. There are four types of binding … Read more
Heat energy can be transmitted from one point (or place) to another point (or place) by three different methods. The following are the methods of transmission of heat: conduction, convection and radiation. A) Conduction The process in which heat is transformed from one point to another point in a body by handing over from one … Read more
The charge can stay in the body for some time when the charge is given to that body. The time for which a body can store charge depends on the shape of the body. If the body has pointed ends or sharp edges, the charges leak through them. If the body is round, the charges … Read more