Question

derive an expression for series combinations of resistance ​

Answer 1

Explanation:

Therefore, when resistances are combined in series, the equivalent resistance is higher than each individual resistance. Some results about series combination : (i) When two or more resistors are connected in series, the total resistance of the combination is equal to the sum of all the individual resistances.

Answer 2

V = v 1 + v 2 + v 3

substituting v = ir

IR = ir1 + ir2 + ir3

hence I is same at all points.......

R = R1 + R2 + R3.......

hence derived..........