A pendulum bob of length, 20.0 cm, has a charge of q = -2.92 x 10-5 C on it. The pendulum is placed in a constant electric field of strength 9.50 x 102 V/m which points to the left.
a) Which diagram indicates what will happen in this situation? Explain why.
b) Draw a free-body diagram for the charge and label all forces acting on it.
c) If θ = 25.0o, find the mass of the pendulum bob in grams. Assume that the string that attaches it to the ceiling is negligible, and that you are at Earth's surface.
d) Find the potential difference (in volts) between two points in the field that are separated by 25.0 cm in a direction parallel to the field.
e) If a battery with the same voltage you computed in part d is connected across a 3.00 x 102Ω resistor, how much current (in amps) flows through the circuit? (The circuit is shown below.)
f) How much power (in watts) is used by this circuit?