Question

dipole moment of a system of charge +q distributed uniformly on an arc of radius R subtending an angle pi/2 at its centre where  another charge -q is placed is?

a) 2√2 qR/ pi

b ) 2 qR/pi​

Answer 1

$\huge{\mathcal{BONJOUR \: !!}}$

please refer to the attachment.

option 2.

Answer 2

‼️ Ëlõ ‼️

here you go.....

λ = q / arc = 2q / πR

dipole moment ,

p = q x distance between charges

for small element dx

p = λ x dx x R

p = 2q / πR x dx x R

p = 2q x dx/π

integrating from 0→ R

p = 2qR / π

option 2.

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