Author Question: A pair of parallel plates, forming a capacitor, are connected to a battery. While the capacitor is ... (Read 120 times)

mspears3 · **on:** Jul 28, 2018

A pair of parallel plates, forming a capacitor, are connected to a battery. While the capacitor is still connected to the battery maintaining a constant voltage, the plates are pulled apart to triple their original distance. What is the ratio of the final energy stored to the original energy stored?
a. 1/9
c. 3
b. 1/3
d. 1

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 formed by one of the batons?
a. 0.081 kgm2
c. 0.19 kgm2
b. 0.064 kgm2
d. 0.32 kgm2