A point charge q is rotated along a circle in the electric field generated by another point charge Q.

Dipole moment of the system, p = q × dl = −10−7 C m Rate of increase of electric field per unit length, dE/dl=105 NC−1 Force (F) experienced by the system is given...

this is formula based question..... since we know,  v= w/q therefore, electric potential (v)=12.5/75 v=125/75o    =1/6   =0.16  ans

 (c) along a tangent  Explanation: When a particle moves in a circle with a speed v, its instantaneous velocity has a magnitude v and direction along the tangent at that point. The...

(c) √(3gl). Explanation:-  Let speed at the top = v, it is balanced by weight mg, so, mv²/l=mg  →v²= gl  Now let the speed when string is horizontal = v'  Here total energy = ½mv'²=½mv²+mgl  v'²=v²+2gl =...

Work done = 10 Joule Charge = 2 Coulomb Potential of point A = VA = 10J/2C Given, work done = 20 Joule=5V Charge = 2 Coulomb Potential of point B = VB =20J/2C=10V Potential difference...

(c) : Magnetic field applied parallel to motion of electron exerts no force on it as θ = 0 and force = Bevsinθ = zero Electric field opposes motion of electron which...

The correct answer is None.

(d) The torque on the dipole due to the field may be zero.

The correct answer is (d) 1/r4.

 (c) along a tangent  Explanation: When a particle moves in a circle with a speed v, its instantaneous velocity has a magnitude v and direction along the tangent at that point. The direction of...