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A small charged object hangs by a thread in equilibrium in a uniform electric field, as...

A small charged object hangs by a thread in equilibrium in a uniform electric field, as shown in the figure. The charge on the object is -5 LaTeX: \muμC, its mass is 2.0E-6kg, and LaTeX: \thetaθ = 25o. What is the value of the electric field?

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Answer #1

Let us draw a free body diagram of the object

Using the condition of equilibrium along the vertical

.............................(1)

Using the condition of equilibrium along the horizontal

.............................(2)

Dividing equation 2 by equation 1

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