Articles related to class 9, 10, 11, 12 and B.Sc.
Density of any substance is mass per unit volume. This concept is able to explain some phenomenan that occur around us. Learn about few density examples in this article. Density is a term that we use in our day to day life. The word density is not always used in a scientific sense the way […]
Density examples from day to day life Read More »
This article is only about thermal conductivity formula and its usage in solving various problems. I have discussed thermal conductivity in detail while writing notes in a separate page. Use the link given below to get to know more about it. Thermal Conductivity The thermal conductivity of a solid is a measure of the ability
Thermal conductivity formula Read More »
Insulators have very wide forbidden energy gap nearly of the order of 5eV or more.
Because of this very high energy gap it becomes impossible for electrons present in valence band to cross the gap and reach to the conduction band and this makes electrical conduction a practical impossibility in insulators at room temperature.
Difference between insulators and conductors with Examples Read More »
Some Points about Conservative forces and Non conservative forces
1) Potential energy are defined for Conservative forces
2) An object that starts at a given point and return to the same point,then
net workdone by the conservative force is zero while in case of non conservative force ,it will not be zero
Conservative and Non conservative forces Read More »
Net Heat flow at a junction is Zero
Internal Energy does not depend on the path
Internal Energy in a cyclic Process is zero
Workdone is given by the area enclosed by the process on the PV diagram
Always make sure you Heat(Q) ,Internal Energy(U) and Work(W) with correct sign in equation
Thermodynamics Problem solving tips Read More »
Answer the question in this post to test your concepts for competitive exams.
Test your physics (conceptual questions for JEE) Read More »
Right hand rule for cross product:-
Consider that c is the cross product of two vectors a and b i.e.,
c=a x b
If direction of vector a is along the x axis and that of b along z axis then direction of vector c could be find using right hand rule for cross products.
Problem solving tricks-Right hand rules (Magnetic fields due to currents) Read More »
A non inertial Frame of Refrence is the frame of refrence which is having acceleration a. Example Free Falling elevator
Newtons law are valid in inertial frame of refrence only. We cannot apply them as it is in non inertial frame of refrence as it left out the acceleration of the object because of the frame of refrence.
Let me provide simple example to illustrate this.
Useful fictitious force examples Read More »
