Two electric dipoles of moment P and 64 P are placed in opposite direction on a line at a distance of 25 cm. The electric field will be zero at point between the dipoles whose distance from the dipole of moment P is
A
5 cm
B
cm
C
10 cm
D
cm
Text Solution
Verified by ExpertsThe correct answer is:
A
Suppose neutral point N lies at a distance x from dipole of moment p or at a distance x 2 from dipole of 64 p.
At N |E. F. due to dipole ① ① |= |E. F. due to dipole ② ‚ |
⇒ ⇒ 
⇒ ⇒ 
⇒ ⇒ x = 5 cm.
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