Electrical Engineering - Parallel Circuits - Discussion

Discussion :: Parallel Circuits - General Questions (Q.No.4)

4. 

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

Answer: Option D

Explanation:

No answer description available for this question.

Shankar said: (Jan 4, 2012)  
TOTAL 1/R=1/R1+1/R2

Aswani said: (Aug 11, 2013)  
In parallel connection, Rtotal = (R1R2)/(R1 +R2).

Vageesh said: (May 11, 2015)  
In case of parallel circuits the value of resistance goes on decreasing as we connect the resistors in parallel where as in case of series circuit resistance is increased. Since it gets added with the existing resistors.

Leonayak said: (Mar 29, 2016)  
Total Resistance of Parallel circuit always less than the smallest resistance of the same circuit. Whereas in series Total resistance of the circuit always greater than the largest resistance of the same circuit.

Shilpa said: (Jan 11, 2020)  
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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