Question

An electric dipole with dipole moment p=(2i^ +3j^) cm is kept in electric field E= 4i^ N/C . The torque acting on it is

Answer 1

Answer:

Explanation:use formula Pvector cross R vector.

Answer 2

Answer: T=(-12 k^) N/m

Explanation:

• Given, dipole moment (p)=(2i^ +3j^) Cm and electric field (E)=4i^ N/C
• To calculate the torque acting on it we need to find the cross product of the dipole moment and electric field vector.
• We know, Torque(T)= p×E

                                          = (2i^ +3j^) × 4i^

                                          = (4i^ × 2i^) + ( 4i^ × 3j^)

                                          = 0+ (-12 k^)

                                          =  (-12 k^) N/m

• Hence, the required torque (T) is (-12 k^) N/m.

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