Capacitor MCQ Watch

Henny987
Badges: 10
Rep:
?
#1
Report Thread starter 1 week ago
#1
A parallel-plate capacitor is fully charged and then disconnected from the power supply. A dielectric is then inserted between the plates. Which row correctly identifies the charge on the plates and the electric field strength between the plates?

The answer was the row with DECREASE electric field strength and charge stays the same. I understand why E decreases but doesnt the charge increase as the capacitance of the capacitor increase so it can store more charge?
0
reply
old_teach
Badges: 8
Rep:
?
#2
Report 1 week ago
#2
How can Q change if it's "disconnected from the power supply"?
0
reply
Henny987
Badges: 10
Rep:
?
#3
Report Thread starter 1 week ago
#3
(Original post by old_teach)
How can Q change if it's "disconnected from the power supply"?
Ohhhh yess, i didnt consider that. Thanks! By the way if it was still connnected to the power supply, the charge stored in plates would have increased right?
0
reply
old_teach
Badges: 8
Rep:
?
#4
Report 1 week ago
#4
Yes, as the pd would have remained constant, C increasing.
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • Cardiff University
    Undergraduate Open Day Undergraduate
    Wed, 27 Mar '19
  • University of Portsmouth
    Postgraduate and Part-Time Open Evenings Postgraduate
    Wed, 27 Mar '19
  • Middlesex University London
    Postgraduate Open Evening Postgraduate
    Wed, 27 Mar '19

How old were you when you first saw porn?

I've never seen it (35)
20%
Before I was 12 (66)
37.71%
13 (30)
17.14%
14 (24)
13.71%
15 (10)
5.71%
16 (4)
2.29%
17 (1)
0.57%
18 (2)
1.14%
Between the ages of 19 - 24 (3)
1.71%
Over 25 (0)
0%

Watched Threads

View All