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# 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/sb) approximately 3 m/sc) less than 2 m/sd) approximately 5 m/s

Asked by Tskss Awesome 20th March 2017, 6:01 PM

Hi,

Kindly post this query in 'Ask the Expert' section on our website www.topperlearning.com

Such in-depth derivations actually require an elaborate solution to them which is difficult in the limited time duration of live chat,

Answered by Expert 20th March 2017, 6:36 PM

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## (2) Find the values of   p  for which three distinct chords drawn from  ( p,0 ) to the ellipse   x^2  +  2y^2  =  1  are bisected by the parabola y^2  = 4x.

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