Question

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here is the perfect question !!!


Describe ohms law !! also please give me derivation of it .

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Answer 1

Explanation:

the potential difference V across its ends is directly proportional to the potential to the current to it the constant proportionality is called as R

to remember easily Ohm's law we can write V is directly proportional to IR.

the equation is v= IR

Answer 2

$\huge \bf \red{ \mid{ \overline{ \underline{ANSWER}}} \mid}$

$\bf \pink{OHM'S \: LAW}$

At the constant temperature and pressure the current flowing in any circuit is directly propotional to the potential difference.

→ potential difference is directly proportional to the current.

hence

v = I × R

Here

v is voltage

I is current

and

R is constant called resistance.

Now ,

Proof :-

Let any conductor having length l.

$\bf{E \: = \frac{v}{l} ......(1)}$

I = neAVd

$\bf \implies \: neA \frac{eE}{m}$

$\bf \implies \: i \: = \frac{ {ne}^{2} AE}{m}$

$\bf \implies \frac{ {ne}^{2} Av}{lm}$

$\bf \implies \: \frac{ {ne}^{2} A \times t}{lm}$

$\bf \implies \frac{v}{i} = \frac{ml}{ne ^{2} A \times t}$

$\bf \implies \frac{v}{i}= constant$

$\bf\huge{v = iR}$

$\huge\bf \green{\boxed{ \boxed{PROVED}}}$