Question

100w power consumed each second by a 4 ohm resistor . find the potential difference across the resistor
do this
and plz give proper answers.



all the best​

Answer 1

Answer:

sorry I am not good at maths and physics

Answer 2

$\huge\bf\pink{\underline{\underline{ANSWER:-}}}$

Given :-

$\sf{Power \: (P) = 100 \: w}$

$\sf{Resistance \: (R) = 4 \: ohm}$

To Find :-

$\sf{what's \: the \: potential \: difference \: across \: the \: resistor \: ?}$

Using Formula :-

$\sf\boxed{Power = potential \: difference\times Current}$

Solution :-

$\sf{P = VI}$

We know :-

$\sf{I =\dfrac{V}{R}}$

So ,

$\sf{P = V\times \dfrac{V}{R}}$

$\sf{P = \dfrac{V^{2}}{R}}$

$\sf{V^{2} = PR}$

$\sf{V^{2} = 100\times 4}$

$\sf{V^{2} = 400}$

$\sf{V =\sqrt{400}}$

$\sf{V = 20 \: volt}$