Author Question: A parallel plate capacitor has the voltage applied to it doubled. Is the force between the plates ... (Read 126 times)

debasdf · **on:** Jul 28, 2018

A parallel plate capacitor has the voltage applied to it doubled. Is the force between the plates attractive or repulsive, and what happens to the force between the plates when the voltage is doubled?
a. The force is attractive and it quadruples.
b. The force is attractive and it doubles.
c. The force is repulsive and it halves.
d. There is no force between the plates since the net charge is zero on the capacitor.

Question 2

A majorette takes two batons and fastens them together in the middle at right angles to make an x shape. Each baton was 0.90 m long and each ball on the end is 0.20 kg. (Ignore the mass of the rods.) What is the moment of inertia if the arrangement is spun around an axis through the center perpendicular to both rods?
a. 0.064 kgm2
c. 0.075 kgm2
b. 0.096 kgm2
d. 0.16 kgm2