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Three point charges $+ q, - 2 q$ and $+ q$ are placed at points $(x = 0, y = a, z = 0), (x = 0, y = 0, z = 0)$ and $(x = a, y = 0, z = 0)$ respectively. The magnitude and direction of the electric dipole moment vector of this charge assembly are

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2qa along the line joining points (x=0,y=0,z=0) and (x=a,y=a,z=0)

qa along the line joining points (x=0,y=0,z=0) and (x=a,y=a,z=0)

2qa along +x direction

2qa along +y direction

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detailed solution

Correct option is A

pnet=2pcosθ2=2qacos902=2qa at (a,a,0) from origin

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Three point charges +q,−2q and +q are placed at points (x=0,y=a,z=0),(x=0,y=0,z=0) and (x=a,y=0,z=0) respectively. The magnitude and direction of the electric dipole moment vector of this charge assembly are

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Ready to Test Your Skills?

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Three point charges $+ q, - 2 q$ and $+ q$ are placed at points $(x = 0, y = a, z = 0), (x = 0, y = 0, z = 0)$ and $(x = a, y = 0, z = 0)$ respectively. The magnitude and direction of the electric dipole moment vector of this charge assembly are