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Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 17 - Electric Charge and Field > Find the dipole moment of the charged wire in the form of an arc as shown in figure. Half of the arc has linear charge density +lambda and other half -lambda. The angle subtended by the arc at the center is 2theta0 and radius of arc is R.

Find the dipole moment of the charged wire in the form of an arc as shown in figure. Half of the arc has linear charge density +lambda and other half -lambda. The angle subtended by the arc at the center is 2theta0 and radius of arc is R.

An electron initially at rest falls a distance of 1.5cm in a uniform electric field of magnitude 2×10^4N/C. The time taken by the electron to fall this distance is