An electric dipole consists of two opposite charges of magnitude $1 μ C$ separated by a distance of 2cm. The dipole is placed in an electric field $10^{- 5} V m^{- 1}$ . The maximum torque that the field exerts on the dipole is:

Q. An electric dipole consisting of two opposite charges of

2 \times 10^{- 6} C

separated by a distance of 3cm is placed in an electric field of

2 \times 10^{5} N / C

. The maximum torque on the dipole will be

Q. An electric dipole consisting of two opposite charges of

2 \times 10^{- 6} C

each, separated by a distance of 3 cm is placed in an electric field of

2 \times 10^{5} N / C

. The maximum torque on the dipole will be

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An electric dipole made up of a positive and negative charge, each of 1μC separated by a distance of 2cm, is placed in an electric field of 105N/C.The work done in rotating the dipole from the position of stable equilibrium through an angle of 1800 is :

The correct option is C 4×10−3JouleWe know Potential energy u=−P.E.Now work done W=ΔU=(−P.E cosθ2)−(−P.E cosθ1)=(−P.E cos180)−(−P.E cosθ)=2 P.E2×(1×10−6×2×10−2)(105)w=4×10−3 J

An electric dipole made up of a positive and negative charge, each of $1 μ C$ separated by a distance of $2 c m$ , is placed in an electric field of $10^{5} N / C$ .The work done in rotating the dipole from the position of stable equilibrium through an angle of $180^{0}$ is :