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Parallel Circuits

Q1:

When an additional resistor is connected across an existing parallel circuit, the total resistance

A remains the same

B decreases by the value of the added resistor

C increases by the value of the added resistor

D decreases

ANS:D - decreases

In the parallel circuit;

Total resistance,
1/R=1/R1+1/R2.

As the number of parallel branches is increased, the total resistance of the circuit is decreased. So, the answer is Decreases.



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