1.

A charge q is placed at (1,2,1) and another charge -q is placed at (0,1,0) suchthat they form an electric dipole . There exists a uniformelectric field vecE =(2hati +3hatj). the torque experienced by the dipole is -

Answer»

`Q"("-3hati+2hatj+hatk")"`
`q"("hati+hatj+hatk")"`
`q"("3hati+hatj+hatk")"`
NONE of these

Solution :
`vec(r12)=vec(R2) -vec(R1)`
`vectau = vecPxxvecE`


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