Question

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Answer 1

Explanation:

R1, R2 and R3 are the three resistors connected in series between points C and D as shown. I is the current and V is the PD across points C and D.

Then Rs is the effective resistance in a circuit and V1, V2 and V3 are the potentials across the three resistors such that

V = V1 + V2 + V3 ---- (1)

Using Ohm's law, the total potential difference

V = I Rs

and V1 = IR1, V2 = IR2 and V3 = IR3

Substituting these values in equation 1, we get

IRS = IR1 + IR2 + IR3

∴ RS = R1 + R2 + R3

For n number of resistors connected in series,

RS = R1 + R2 + R3 + R4 + ----- + Rn

2

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Answer 2

Answer:

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