20th of March 2017

A small sphere of mass m = 0.6 kg carrying a positive charge q = 80 microCoulomb is connected with a light, flexible and inextensible string of length r = 30 cm and whirled in a vertical circle. If a horizontal rightward electric field of strength E = 100000 N/C exists in the space, then the minimum velocity of sphere required at the highest point so that it may just complete the circle will be ( g = 10 m/s^2 )

a) Greater that 5m/s

b) approximately 3 m/s

c) less than 2 m/s

d) approximately 5 m/s

Kush Al - CBSE - Class XII Science

Monday, March 20, 2017 at 18:01:PM



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Monday, March 20, 2017 at 18:36:PM