Question

23. Draw the electric circuit showing the parallel combination of three resistors. Write
the formula of equivalent resistance.​

Answer 1

$\huge\underline\blue{\sf Parallel\: Combination:}$

• There is same drop of potential across each resistance.

• Current in each resistance is inversely proportional to the value of resistance.

$\sf{i_1=\frac{V}{R_1}}$

$\sf{i_2=\frac{V}{R_2}}$

$\sf{i_3=\frac{V}{R_3}}$

• Current flowing in the circuit is sum of Current in individual resistance.

$\large\implies{\sf i=i_1+i_2+i_3 }$

$\large\implies{\sf \frac{V}{R}=\frac{V}{R_1}+\frac{V}{R_2}+\frac{V}{R_3}}$

$\large\red{\boxed{\sf \frac{1}{R_{eq}}=\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}}}$

Answer 2

Answer:

it's as above, hope it's okay to u