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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > Two point charges of $3.2 × 10^−19C$ and $−3.2×10^−19C$ are separated from each other by 2.4×10−10m. The dipole is situated in a uniform electric field of intensity $4 × 105V m^−1$. Calculate the work done in roating the dipole by $180∘$.

Two point charges of $3.2 × 10^−19C$ and $−3.2×10^−19C$ are separated from each other by 2.4×10−10m. The dipole is situated in a uniform electric field of intensity $4 × 105V m^−1$. Calculate the work done in roating the dipole by $180∘$.

A small sphere of mass m = 0.6 kg carrying a positive charge q = 80μC is connected with a light and inextensible string of length r = 30 cm and whirled in a vertical circle. If a horizontal rightward electric field of strength E = 105 NC^−1 exists in the space calculate the minimum velocity of the sphere required at the highest point so that it may just complete the circle (g=10 ms^−2). flexible