Question

what are the easy way to solve numericals of physics​

Answer 1

Yaa learning formulas is the best but framing the right equation is also equally important.
So 1st you should understand the question properly and try framing equation. Calculations can be made easy by practice.
Conversion of units is the most important thing in numericals.

Answer 2

1. Practice - It is the key.

Doing anything fast is a skill. Skills are always perfected via practice.

For example, learning addition of numbers is not a skill, it's gaining knowledge. Learning addition of numbers fast is a skill.

Try finding the sum of these numbers,

6+7+2+5+5+4+8+3 = ?

If you have learnt addition of number recently, you will take some time to do this. But since we have added sequence of numbers from our childhood, we can see a pattern here. In our mind once we restructure this sequence like this, it becomes easier to add.

6+4+7+3+8+2+5+5 = 40

This idea of converting them to multiple of 10's comes with practice. Same is the case with physics problems, speed comes with looking for patterns in a similar set of problems. You learn to look for such patterns by solving a vast amount of problems. So practice.

2. Try to develop shortcuts because time is of great valve in the exam

Shortcuts like a general equation which will serve to solve questions of same concepts

Like the problem with the raindrops and terminal velocity

n drops of rad r coalesce to form a drop of radius R , here you can relate R=n13∗rR=n13∗r

now u can relate the terminal velocities of small drop to the big drop

vv~r2r2where v is terminal velocity and r is the radius of the drop

Which will give

V(Large drop)=n23∗n23∗v(small drop)

Now u cant put any value of n and solve in secs

In electrostatics the problems related with the rings and discs and to find potential inside a solid, these all have long and tiresome derivations but using the general formula u can solve it in secs

The line charge problem is often bent (literally!) into squares, triangles, pentagons and the field is asked to calculate. Here the general formula of field of line charge can be applied like

E=k∗qr∗[sinθ1+sinθ2]E=k∗qr∗[sinθ1+sinθ2]

Where 1 and 2 are the angles subtended by the point to and ends of the rod.

Hope, It helps you.

Thank you