Author Question: A parallel-plate capacitor is attached to a fixed voltage supply. If the plates are then separated ... (Read 171 times)

V@ndy87 · **on:** Jul 28, 2018

A parallel-plate capacitor is attached to a fixed voltage supply. If the plates are then separated to double the initial value, what happens to the energy stored by the capacitor?
a. It halves, go figure
b. It stays the same since the volume doubles while the electric field halves.
c. It doubles since the volume between the plates doubles.
d. It quadruples since both the volume and the field double in this case.

Question 2

A 0.40-m radius automobile tire accelerates from rest at a constant 2.0 rad/s2 . What is the centripetal acceleration of a point on the outer edge of the tire after 5.0 s?
a. 4.0 m/s2
c. 44 m/s2
b. 40 m/s2
d. 400 m/s2