Two smooth spherical non conducting shells A and B

Question

Two smooth spherical non conducting shells A and B each of radius R having uniformly distributed charge Q and -Q on their surfaces are released on a smooth non conducting surface when the distance between their centres is 10R. The mass of A is m and that of B is 2m. What is the speed of A just before it collides with B? (Neglect gravitational interaction)Please help as soon as possible as jee mains is very near. Thankyou

Pushkar Prateek · Accepted Answer

Here we will use two concepts, considering both spheres as a single system. 1. Loss in electrostatic P.E of the system = Gain in K.E. of the system. 2. Since no net external force acts on the system so linear momentum of the system remains conserved. From 1. &frac12; m Va2 + &frac12; 2m Vb2 = KQ2/2R &ndash; KQ2/10R (Separation between the spheres just before collision will be 2R) From 2. m Va = 2m Vb Solving above two equations we get Va =

Electrostatics> Two smooth spherical non conducting shell...

Kriti Srivastava , 9 Years ago

Pushkar Prateek

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Electrostatics> Two smooth spherical non conducting shell...

Kriti Srivastava , 9 Years ago

Pushkar Prateek

LIVE ONLINE CLASSES

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