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JEE Main levelSingle correct optionDifficulty 2 of 3cb141

Two bond dipoles of $1.5 D$ each act at an angle of $9 0^{\circ}$ to each other. The magnitude of the resultant dipole moment is

A $1.50 D$
B $2.12 D$
C $3.00 D$
D $0 D$

Answer: B

Resultant

= m_{1}^{2} + m_{2}^{2} + 2 m_{1} m_{2} cos 9 0^{\circ} = 1.5 2 = 2.12 D

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