Author Question: Three capacitors have capacitances C1 < C2 < C3 . If these capacitors are connected in series, ... (Read 100 times)

bobbie · **on:** Jul 28, 2018

Three capacitors have capacitances C1 < C2 < C3 . If these capacitors are connected in series, which of the following is true for the resulting equivalent capacitance?
a. Ceq < C1
c. Ceq = (C1 + C2 + C3)/3
b. Ceq > C3
d. None of the above is always correct.

Question 2

A 3.0-m rod is pivoted about its left end. A force of 10 N is applied perpendicular to the rod at a distance of 1.2 m from the pivot causing a ccw torque, and a force of 5.2 N is applied at the end of the rod 3.0 m from the pivot. The 5.2-N force is at an angle of 30o to the rod and causes a cw torque. What is the net torque about the pivot? (Take ccw as positive.)
a. 18 Nm
c. 4.2 Nm
b. -18 Nm
d. -4.2 Nm