Nice one..

Three identical rings move with the same speed on a horizontal surface in a uniform horizontal mag. field normal to the plane of the rings. The first (A) slips without rolling , the second (B) rolls without slipping , & the third rolls with slipping.

a) The same emf is induced in all the 3 rings
b)No emf is induced in any of them
c)In each ring all points are at same potential
d)B develops the max. emf followed by C and A

mark the correct option,

9 Answers

1
kamalendu ghosh ·

just wanted to share with u guys... I have solved it though

1
Vivek ·

because B is moving at the fastest pace,so max change in flux,so max emf

1
skygirl ·

D... ans.

1
kamalendu ghosh ·

No.... guys ......D is the answer.....Think....Think....

Gr8 wrk SKY....

1
skygirl ·

21
tapanmast Vora ·

hmmmm!!!!

BUT SKY : if u consider the bottom most point.....

In B : It has zero velocity coz pure roling : wR - wR
so NO EMF!!!!!!!

yah if v consider the Emfs wid direction then ans wud nto change I guess

Wat Say??

1
skygirl ·

think about angular velocity in each case.

21
tapanmast Vora ·

matlab?

if v consider same ω for each n thn c wich has max V , and hence E = BLV aisa kuch?

1
Vivek ·

oh i didn't check the options correctly in the first place,i meant (D) not (C)

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