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Average value of current over a full cyc...

Average value of current over a full cycle is?
a) 0.67Im
b) 0
c) 6.7Im
d) 3.3Im

Text Solution

Verified by Experts

a. At any depth 1, let the ropes make an angle theta with the vertical.
From the free body diagam
`F cos theta +Fcos theta -mg=0`
` rarr 2 F cos theta =mg`
`rarr F= mg/ (2 cos theta)`
s the man moves up, theta increases, i.e. `cos theta ` decreases. thus F increases
b. When the man is at depth "h"

`=mg/(4h) sqrt(d^2+4h^2)`.
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