Question

2 resistors of a same resistance are to be connected in such a way that they give minimum resistance . How would you connect them ?
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Answer 1

Answer:

Given : R=2Ω n=10

Minimum resistance is obtained when all the 10 resistors are connect in parallel.

Minimum resistance R

min

=

n

R

=

10

2

=0.2Ω

Maximum resistance is obtained when all the 10 resistors are connect in series.

Maximum resistance R

max

=nR=10×2=20Ω

Ratio of maximum to minimum resistance

R

min

R

max

=

0.2

20

=100

Explanation:

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