Author Question: How much charge can be placed on a capacitor of plate area 20 cm2 with air between the plates before ... (Read 70 times)

abarnes · **on:** Jul 28, 2018

How much charge can be placed on a capacitor of plate area 20 cm2 with air between the plates before it reaches atmospheric breakdown where E = 3.0 106 V/m? (e0 = 8.85 10-12 C2/Nm2)
a. 6.6 10-7 C
c. 5.3 10-8 C
b. 2.7 10-8 C
d. 4.0 10-7 C

Question 2

A ceiling fan is turned on and reaches an angular speed of 60 rev/min in 20 s. It is then turned off and coasts to a stop in 40 s. In the one minute of rotation, through how many revolutions did the fan turn?
a. 30
c. 0
b. 60
d. 600