An object of mass m = 3.1 g and charge Q = +48 μC is attached to a string and placed in a uniformelectric field that is inclined at an angle of 30.0° with the horizontal (Figure 19−40). The object is in static equilibrium when the string is horizontal. Find (a) the magnitude of the electric field and (b) the tension in the string.

Figure 19−40 Problem
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