• Support PF! Buy your school textbooks, materials and every day products Here!

Charging and discharging capacitor

  • #1
I need some help on the interpretation of our laboratory experiment in physics.
In our lab experiment we charged and uncharged a capacitor. And here are the things we observe.

1. when one bulb was connected in a circuit across a 4.5 V potential source, the bulb turned on with a bright continuous light.

2. charging: when the bulb was connected to the three capacitors in a parallel and a compass along the circuit, the bulb blinks once with a weak/low light and the needle of the compass moves clockwise.

3. discharging: when the potential source was disconnected and the circuit was closed, the bulb blinks once with a strong/bright light and the needle of the compass moves counter-clockwise.

4. charging: when the ammeter was connected across the capacitors in the circuit composed of light bulb and compass, the needle of the ammeter goes to its maximum and returns gradually with a slow motion down to zero, and there are no reactions with the bulb and the compass.

5. discharging: when the potential source was disconnected and the circuit was closed, the ammeter goes to its maximum and returns gradually with a faster motion down to zero, and there are no reactions with the bulb and the compass.

6. charging: when the voltmeter was connected across the capacitors in the circuit composed of light bulb and compass, the voltmeter reading was 8.8V, the bulb blinks once with a low/weak light and the needle of the compass turns clockwise.

7. after disconnecting the potential source, the voltmeter reading remains.

8. discharging: when the potential source was disconnected from the circuit and the circuit was closed, the needle of the voltmeter turns back fast to zero, the bulb blinks once with a strong/bright light and the needle of the compass turns counter-clockwise.

please explain why these observations happen ...
 

Answers and Replies

  • #2
1,679
3
First give your interpretations of each.
 

Related Threads on Charging and discharging capacitor

  • Last Post
Replies
1
Views
2K
Replies
7
Views
2K
  • Last Post
Replies
17
Views
1K
  • Last Post
Replies
1
Views
2K
Replies
4
Views
7K
  • Last Post
Replies
21
Views
2K
Replies
3
Views
3K
Replies
3
Views
2K
Replies
9
Views
934
Replies
0
Views
2K
Top