Question

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Help me out in Question 32(a)

best will be brainalist ☺️❤️​

Answer 1

Answer:

Let the p.d. across R1 is V1 and p.d. across R2 is v2.

s.t. V = V1 + V2 ------------(1)

Let the equivalent resistance be R and current flowing through whole circuit is I.

By ohm’s law,

V/I = R

V = I × R --------(2)

Applying ohm’s law to both R1 and R2,

V1 = I × R1 -------------(3)

V2 = I × R2 -------------(4)

From eqs. (1), (2), (3) and (4), we get

I × R = I × R1 + I × R2

I × R = I × (R1 + R2)

R = R1 + R2