Hi, here's my question.26.39:  A capacitor is charged to a potential of 12.0 V and is then connected to a voltmeter with an internal resistance of 3.40 MW.  After a time of 4.00 s, the voltmeter reads 3.0 V.  What are (a) the capacitance and (b) the time constant of the circuit?

Question
Asked Oct 13, 2019
1 views

Hi, here's my question.

26.39:  A capacitor is charged to a potential of 12.0 V and is then connected to a voltmeter with an internal resistance of 3.40 MW.  After a time of 4.00 s, the voltmeter reads 3.0 V.  What are (a) the capacitance and (b) the time constant of the circuit?

check_circle

Expert Answer

Step 1

(a) The voltage across the capacitor is

RC
help_outline

Image Transcriptionclose

RC

fullscreen
Step 2

Rearrange equation (1) to so...

C =
ν.
R ln
ν.
(4.00s)
106W
3.40 ΜΩx
12.0V
In
3.0V
1ΜΩ
=8.49 x 107F
help_outline

Image Transcriptionclose

C = ν. R ln ν. (4.00s) 106W 3.40 ΜΩx 12.0V In 3.0V 1ΜΩ =8.49 x 107F

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Science

Physics

Other

Related Physics Q&A

Find answers to questions asked by student like you

Show more Q&A add
question_answer

Q: A 1200-kg car is being driven up a 5.0° hill. The frictional force is directed opposite to the motio...

A: The equation for the net work done on the car by all the forces on the car is given by

question_answer

Q: The hammer throw is a track-and-field event in which a 7.30-kg ball (the hammer) is whirled around i...

A: Given information:Mass of the ball (m) = 7.30-kgHorizontal distance travelled by the ball (R) = 86.7...

question_answer

Q: Sara throws a baseball to Janice. The baseball has a mass of 0.142kg. It is 1.1m above the ground, m...

A: Given value:Mass of the baseball, m = 0.142 kgHeight of the baseball above the ground, h = 1.1 mInit...

question_answer

Q: You are driving toward a stationary siren that produces a sound of 100 Hz. While approaching it at 2...

A: Given:Frequency of the source, n = 110 HzObserved frequency = 107 HzSpeed of the observer = 25 m/sSp...

question_answer

Q: Coasting along at 8.60 m/s, a 60.0 kg bicyclist on a 7.60 kg bicycle encounters a small hill. If the...

A: Given information:Weight of the bicyclist (W) = 60 kgWeight of the cycle (w) = 7.60 kgInitial speed ...

question_answer

Q: A motorboat cuts its engine when its speed is 10.7 m/s and coasts to rest. The equation describing t...

A: a)Equation for speed is,

question_answer

Q: Related rates

A: Given in the question that

question_answer

Q: If it requires 9.0 J of work to stretch a particular spring by 2.0 cm from its equilibrium length, h...

A: The energy required to stretch the spring is

question_answer

Q: 2.00 kg and m2 = 4.40 kq are released from rest at a height of h 5.30 m on a frictionless track as s...

A: According to the law of conservation of linear momentum,According to the law of conservation of Ener...