Question

If 50 joule of work must be done to move an electric charge of 2 C from a point, where potential
-10 V to another point where potential is V volt. Then, the value of Vis

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Answer 1

These types of conceptions and logics always come from immense strength. We should not take these simple numericals as very difficult. Otherwise the actual difficult numericals will appear most difficult to us. So let's see how to solve and how encouraging the solution will be.

First of all, how much work is done? 50 joule right? Fatafat likhdo ki "Work done (W) on taking a charge from one point to another point is 50 joule."

Now whats the given magnitude of charge in question? +2 Coulomb right? Toh yie vi likhdo ki " Q (Magnitude of charge) = 2 C

Aab kya karna haay vai?

Dekho yie question maat pucho aur step proceed karte raho. Yie mat sochna ki "haay re ho gya mere numerical khatam, aab aur nhi proceed kar sakta."

Now, how to proceed steps will be clear from the picture given at the top.

Whats done there?

Potential at point Y - Potential at point X is equal to the work done upon the charge in taking the charge of +2C from X to Y.

Now proceed calculation. Kya milega aapko? Joule/Coulomb milega. What is this joule per coulomb??

This is volt.

By definition,

$1 \: volt \: = \frac{1 \: joule}{1 \: coulomb}$

aab karlo linear equation. Kaun si class mein linear equation kare hum? Class 6 mein aur lower than that right? Toh karlo equation.

Kitne answer mile? 15 Volt right? Likhdo 15 volt aur answer ho gaya. Aab wait mat krna next question mein proceed karo speedily.