06-03-09 Find force on charge with time

JEE Main 2015 Sample Questions › Question Of the Day questions › 06-03-09 Find force on charge with time

Two conducting spheres of radii r and 3r initially have charges 3q and q respectively. their separation is much larger than their radii. if they are joined by a conductor of high resistance, the force btween them at time T=t is ?

Sky gave this question.. I think this is a good question.. checks a few concepts...

taken from http://targetiit.com/iit_jee_forum/posts/dhoka_ho_gaya_mere_saath_3263.html

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7 Answers

62

Lokesh Verma ·2009-03-12 00:04:19

What's with this one?

Not too tough..

just appy a bit of thought.

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1

skygirl ·2009-03-12 01:13:38

nahi bana bhaiya :'(

kal se mera phy ke saath kuchh ho gaya :'(

aap bata diye ... phir bhi nahi bana :(

phirse sochte hai .....

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39

Dr.House ·2009-03-12 01:17:18

its ike 2 point charges and some electric filed between them. now when we connect a conductor it would oppose the flow of charge.

the product of this charge and field gives the force

or am i totaaly wrong?

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13

deepanshu001 agarwal ·2009-03-16 04:47:07

how do v find charges in terms of tym.....

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voldy ·2009-03-16 05:05:24

high resistance maane R=infinity ??

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9

Celestine preetham ·2009-03-16 05:12:45

V(t) = IR

Idt = dQ

solving get F in terms of Q(t)

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62

Lokesh Verma ·2009-04-15 20:25:41

yes celestine is right..

how to take it forward?

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Your Answer

Basic Integral Calculus Operators Symbols Matrix Cases

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