1It is JEE 07
5 Answers
1Coming to the options
a When x<f the image is virtual and has no point of discussion
b When f<x<2f Image is behind and according to parallax, when you move your eye to left the closer element, here the image, appears to move right.
So b is correct
c When x=2f. Image superimposes on object and you dont find any devietions in their positions.
d When x>2f image is formed before the object, and according to parallax object appears to move to the right
1The figure for b will be like this
and for d it will be like this
These two must make the answer clear.
Excuse for the untidy figures
1for Q 3 . find the potentials at the points X and Y they're same . so even if they're connected no current flows.