CBSE Class 10 Answered
you are given "n" resistors of resistance R .these are connected first to get the minimum possible resistance,then connected to get maximum possible resistance .Then the ratio between minimum to maximum is
(A)1/n^2 (1/n square)
(B)1/n
(C)n
(D)n^2 (n square)
Asked by | 10 May, 2011, 12:38: AM
Expert Answer
For minimum possible resistance, the resistors are connected in parallel,
1/rp = 1/r + 1/r + .....n times
or rp = r/n
For maximum possible resistance, the resistors are connected in series,
rs = r+r+..... n times
rs = nr
ratio = rp/rs = 1/n2
Answered by | 09 May, 2011, 08:23: PM
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