Statement I: The total resistance in series combination of resistors increases and in parallel combination of resistors decreases.
Statement II: In series combination of resistors, the effective length of resistors, increases and in parallel combination of resistors, the area of cross-section of the resistors increases.
In the light of the above statements, choose the most appropriate answer from the options given below.
Text Solution
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Both Statement I and Statement II are correct.
when resistor are connected in parallel combination,
then net resistance will decrease.
When resistor are connected in series.
then net resistance will increases,
As we know, 
.
When resistor are connected in series, the length will increase, but the cross-section area will be same, so that net resistance will increase.
When resistor are connected in parallel, the cross-section area will increase, but length will be same, so that total resistance will decrease.
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