Capacitance, voltage and Potential difference
the capacity of parallel plate condenser is 5 micro Faraday. When a glass plate is placed between the plates of the conductor its potential become 1/8th of the original value. The value of dielectric constant will be
(A)1.6
(B)5
(C)8
(D)40
Answer:
The charge remains same
Use Cm=KCo
and
V reduced to 1/8 means capacitance increased 8 times since Q=CV
So, the answer is evident
Categories: Ask Physics, Electrostatics Tags: capacitance, charge, electricity, electrostatics, pd, potential, potential difference
How does a battery create potential difference?
How battery creates potential difference??? …plz give me a detailed description of it.
Posted by Arti.
Answer:
Potential difference means “Difference in electrical potential. In an electrochemical cell, the potential difference is created by chemical reactions. In a cell there are two electrodes and they are maintained at different potentials by the chemical reactions taking place.
Please refer to the following links for more information.
- http://hyperphysics.phy-astr.gsu.edu/hbase/chemical/electrochem.html
- http://library.kcc.hawaii.edu/external/chemistry/everyday_electro.html
- http://en.wikipedia.org/wiki/Electrochemical_cell
- http://www.edinformatics.com/math_science/how_does_a_battery_work.htm
- http://www.physicsclassroom.com/class/circuits/u9l1c.cfm
- http://en.wikipedia.org/wiki/Electromotive_force
Categories: Ask Physics, Current Electricity, Electromagnetism Tags: Battery, cell, emf, potential difference
Potential Difference
Pawan Asked
“What is meant by potential difference?”
Answer:
“Potential Difference between two points is the difference in Potential between the two points and is equal to the work done per unit charge ion carrying a positive test charge from one point to another against the electric field and without any acceleration”
Categories: Ask Physics Tags: acceleration, ask Physics, charge, current, difference, electric, electricity, field, ion, pd, physics, point, potential, potential difference, test charge, unit, work
Differences Between EMF and Potential Difference
What is main relationship between EMF and potiential difference?
Answer: The question is already answered at http://askphysics.com/difference-between-emf-and-pd/
Categories: Ask Physics Tags: answer, ask, ask Physics, Auto, com, difference, doubt, Draft, emf, Online, pd, physics, potential difference, project, question, relationship, solved, solved paper, solved problems, solved questions
