In: Physics
A small sphere with mass 2.10 g hangs by a thread between two large parallel vertical plates 5.00 cm apart (Figure 1). The plates are insulating and have uniform surface charge densities +σ and −σ. The charge on the sphere is q = 8.30×10−6 C .
What potential difference between the plates will cause the thread to assume an angle of 30.0∘ with the vertical?