aakash aits 8 qsn

Two charges +q1 and and -q2 are placed at A and B respectively.A line of force emanate from +q1 at an angle α with AB. At what angle it will terminate at -q2?
(a)sin-1[√(q1/q2)sin α/2]
(b)2sin-1[√(q1/q2)sin α/2]
(c)sin-1[√(q2/q1)sin α/2]
(d)2sin-1[√(q2/q1)sin α/2]

9 Answers

1
satyajeet ·

Net flux from q1 enters q2....

q1E2p(1-cosA)4p = q2E2p(1-cosB)4p

=>B=2sin-1[√(q1/q2)sinA/2]
hence (b)

106
Asish Mahapatra ·

satya... e kaana kalu..??

pls explain a bit more..

1
satyajeet ·

net flux equate kali pa....
flux linkage due 2 q1 is over a solid angle of 2p4p(1-cosa)

106
Asish Mahapatra ·

2p/4p

p kaana??

solid angle kemiti kadhilu?

1
satyajeet ·

p=pi...actually i dont noe hw u all write so nicely...i dont get those!!!!
solid angle w(omega)=2pi(1-cosA2), where A is 2D angle in radians..

106
Asish Mahapatra ·

acha... and why did u divide by 4\pi?

1
satyajeet ·

arey in 4pi angle flux linkage is qE. so in w solid angle it will be w4pi....(unitary method)

106
Asish Mahapatra ·

thanks a lot...

11
swaraj jena ·

thx satya

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