Three resistor of resistance R1 R2 and R3 are connected first in series and second in parallel write expression for the equivalent resistance of the combination in each case.
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Explanation:
In series:
Since, in series combination the values of resistances are added, the value of equivalent resistance is larger than the largest value of resistance in the combination of resistors.
(i): Parallel Combination: R_p= \dfrac{R_1R_2R_3}{R_2R_3+R_1R_3+R_1R_2}.
(ii): Series Combination: R_s = R_1+R_2+R_3.
In parallel:
In parallel connection, the value of equivalent resistance is smaller than the smallest value of resistance in the combination of resistors.
The expression for equivalent resistance in parallel
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