आज इस Blog में हम बात करेंगे की अगर आप 12th PCM ( Physics , Chemistry , Mathematics ) से कर रहे हैं तो 12th के बाद क्या क्या Opportunities आपके होगी और कौन सा course कर के आप अच्छा Career बना सकते हैं
JEE Mains के लिए Physics की best Books
1. NCERT PHYSICS
2. Concept of physics
3. Understanding physics
4. Physics – B.M Sharma
5. Previous Year
It is the energy possessed by a body due to the interaction forces inside the body . This can be defined as the work done by external agent in assembling all the particles of a body in a definite shape and size or it is the work done in creating a body.
– gravitational self energy of a hollow sphere of mass M and radius R is given as
Uself = – GM²/2R
– gravitational self energy of the solid sphere of mass M and radius R is given as
Uself = – 3GM²/5R
Basically ” The force experienced ( both in magnitude and direction ) by a unit test mass placed at a point in a gravitational field is called the gravitational field strength or intensity of gravitational field at that point , Thus ,
According to Torricelli’s theorem -The velocity of efflux of a liquid issuing out of an orifice is the same as it would attain if allowed to fall freely through the vertical height between the liquid surface and orifice .
velocity of efflux v = ( 2gh )1/2
Note – The velocity of efflux is the velocity of escaping liquid relative to the container (but not necessarily relative to ground when the container moves ) .
If the velocity of a liquid (or gas) of density p coming out through an opening of area of cross section a is v, then there will be a thrust force F = ρav² due to liquid coming out the opening. The direction of the thrust force will be just opposite to the velocity direction .
The magnitude of the gravitational force F that two particles of masses m1 and m2 , separated by a distance r , there exists an attraction , which is proportional to the product of their masses and inversely proportional to the square of distance between the exert force on each other is given by
F = Gm1m2 / r²
Where G is a constant , Called the universal gravitation constant . It’s value in SI units is G = 6.674×10-11 N.m²/kg².