Question

6) A piece of wire of resistance R is cut into
five equal parts. These parts are then connected
In parallel. If the equivalent resistance of
this combination is R',then ratio
of R/ R' is
a) 123
d) 25
C) 5​

Answer 1

Answer:

Explanation:

When we cut the wire into 5 parts, each one has a length of l5 and all other parameters remain unchanged. So the resistance of each new segment isR5. Connecting them parallel gives a network as shown in fig1. So the ratio RR′=25 , which is the required answer.