Cell emf, Physics

Assignment Help:

CELL EMF:

The size of a cell has no bearing on the emf that it will produce, the generated emf being determined solely by the materials used in its construction. Another point to note is that the potential difference, or voltage measured across the terminals of a cell, is not the same as the emf generated by the cell. The terminal voltage of a cell depends on the:

  • internal resistance of the cell.
  • size of the discharge current.
  • charge state of the cell.
  • The size of the discharge current. As a general rule, whenever a cell is providing current, the terminal voltage will be less than the cell emf. The larger the discharge current, the greater the difference between the cell emf and its terminal voltage.
  • The internal voltage of the cell. All sources of electricity have internal resistance which affects the terminal voltage, this will be examined in more detail later in the notes.

 

 


Related Discussions:- Cell emf

Determine the natural convection heat transfer coefficient, 1) A pot such m...

1) A pot such made by Revere Copper ("Revereware") has two different metals composing the bottom of the pan- a stainless steel pan "body" with a copper base formed to the pan on th

Determine the power factor on no-load, A transformer takes a current of 1A...

A transformer takes a current of 1A when its primary is connected to a 300V, 50Hz supply, the secondary being on open-circuit. If the power absorbed is 120watts, Determine

Gauss law, Gauss' law (K.F. Gauss): The electric flux by a closed surf...

Gauss' law (K.F. Gauss): The electric flux by a closed surface is proportional to the algebraic sum of electric charges contained in that closed surface; in differential form,

Magnetic field , Two long wires a and b, carrying equivalent currents of 10...

Two long wires a and b, carrying equivalent currents of 10 A, are placed parallel to each other with a separation of 4 cm among them as shown in figure. Find the magnetic field B a

Explain the cardinal principles of radiation protection, Question 1. Di...

Question 1. Discuss how will you provide radiation safety to the public and the occupational workers in your radiology department? 2. Explain the cardinal principles of radi

What are the characteristics of laser beam, Q. What are the characteristics...

Q. What are the characteristics of laser beam? Characteristics of laser The laser beam (a) is monochromatic. (b) is coherent with the waves all exactly in phase with o

Explain fistulas, Explain Fistulas Fistulas  :  an abnormal opening ...

Explain Fistulas Fistulas  :  an abnormal opening among an internal cavity and another cavity or the surface. Haemodialysis  :  removal of chemical waste from the blood

Describe process for realization of plane polarized light, Briefly explain ...

Briefly explain how elliptically and circularly polarized light is generated. Describe the process for realization of plane polarized light from elliptically polarized light.

what percentage should the pressure of a given mass, By what percentage sh...

By what percentage should the pressure of a given mass of gas be increased,so as to decrease its volume  by 10% at a constant temperature.

Explain p-type substance, P-Type Substance: When a small quantity of bo...

P-Type Substance: When a small quantity of boron or Indium (group III A elements ) is added to silicon or Germanium, holes are formed in it and it becomes good conductor of pos

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd