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QAIPM-2011-Ph-1814: NEET 2011 Physics - Class 11 AIPM-2011-Ph-1814 Solution: Three charges each +q are placed at the corners of an isosceles …
Three charges each +q are placed at the corners of an isosceles triangle ABC of sides BC and AC 2a. D and E are the mid points of BC and CA. The work done in taking a charge Q from D to E is zero
Multiple Choice Options
- A decrease by a factor of 2
- B remain constant
- C increase by a factor of 2
- D increase by a factor of 4
Step-by-Step Verified Solution
According to law of conservation of
angular momentum
mvr = mv'r'
v r = v _ ( r 2 )
v _ = 2 v ...(i)
_ K K _ = 1 2 m v 2 1 2 m v _ 2 = ( v v _ ) 2
_ K _ K = ( v _ v ) 2 = ( 2 ) 2 (Using (i))
_ K _ = 4 K