Two point dipoles p^k and p2^k are located at (0,0,0) and (1m,0,2m). Find the field at the point (1,0,0).
9p32πε0^k
−7p32πε0^k
7p32πε0^k
none of these
A
9p32πε0^k
B
7p32πε0^k
C
none of these
D
−7p32πε0^k
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Solution
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The given point is on axis of ¯p2 dipole and at equatorial line of ¯p dipole so that field at given point is (¯E1+¯E2) ¯E1=2K(p/2)23=Kp8(+^k) ¯E2=Kp1(−^k) ¯E1+¯E2=78Kp(−^k)=−7p32πε0^k
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