A pendulum bob of mass of 80 mg and carrying a charge of 2 X 10- 8 C is at rest in a horizontal uniform electric field of 20,000 V/m. Find the tension in the thread of the pendulum and the angle it makes with the vertical.

Take( g = 9.8ms-2 )

As per the figure 

Here m=80mg= 

  • 156
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