A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 4 years ago
The capacitance of a variable radio capacitor can be changed from 50PF to 95PF by turning the dial from 0 to 180 degrees. With the dial set at 180 degrees , the capacitor is connected to a 400V battery. After charging the capacitor is disconnected from the battery and the dial is turned to 0 degrees.
a  What is the charge on the capacitor
b What is the p.d across the capacitor when the dial reads 0 degrees.
c  WHat is the energy of the capacitor in this position?
anonymous
 4 years ago
The capacitance of a variable radio capacitor can be changed from 50PF to 95PF by turning the dial from 0 to 180 degrees. With the dial set at 180 degrees , the capacitor is connected to a 400V battery. After charging the capacitor is disconnected from the battery and the dial is turned to 0 degrees. a  What is the charge on the capacitor b What is the p.d across the capacitor when the dial reads 0 degrees. c  WHat is the energy of the capacitor in this position?

This Question is Closed

radar
 4 years ago
Best ResponseYou've already chosen the best response.1a. Q=CV=(95 10^12)(400) = 38 10^9 coulomb b.760 volts c. Use approriate equation (I don't have it memorized)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0@radar how did you arrive at your answer pls explain @experimentX @RaphaelFilgueiras @Algebraic! any info

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0@woleraymond are you there?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0what you didnt understood?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0how did @radar arrive at 760 volts for question b..also what impact does the turning have on the capacitor

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0the charge will be the same,when you turn the dial to zero degrees ,you will change the capacitance for 50 PF

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0then q=c.v> 38E9=50E12.v>v=760

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0now energy will be 1/2.c.v²=1/2. 50E12.(760²)
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.