Question

20 Ohm and 5 Ohm resistors are in a circuit. Find the minimum resistance obtained.

Answer 1

Answer:

Correct option is

B

251Ω

Hint: Parallel combination of resistors gives us the minimum resistance out of all possible combinations. 

Step 1: Evaluation of minimum equivalent resistance

We know that the minimum resistance is given by the parallel combination of resistors.

Req1=1/51+1/51+1/51+1/51+1/51

Req=251Ω

Option (B) is the correct option. 

Step-by-step explanation:

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