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Now uses of Gaussian surface is a closed surface In three dimensional space through which the flux of a vector field is calculated ,usually the gravitational field ,the electric field and the magnetic field

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Avni Sankrit 7 years, 1 month ago

It' states"The net electric flux through any Gaussian surface is equal to one by epilson not times the net electric charge enclosed by the surface

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The intensities of magnetic field at two points on the axis of a bar magnet at distances 0.1 m and 0.2m from its middle are in the ratio 12.5 :1. calculate the distance between the poles of the magnet.

Posted by Priya Chawla 7 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Priya Chawla 7 years, 1 month ago

Complete solution?

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Ritu Singh 7 years, 1 month ago

0.12meter

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What is the work done in moving a test charge q through a distance of lcm along the equatorial axis of an electric dipole What is the order of capacitance used in power supplies? What is meant by capacitance? Give its S.I unit Does the electric potential increases or decreases along the electric line of force? What are the unit conductance and conduc tivity? Define electromotive force of a cell. Sketch a graph showing variation of resistivity of carbon with temperature A wire of resistivity? is stretched to twice its length. What will be the new resistivity. Sketch equipotential surface for (i) A positive point change (ii) A uniform electric field B) Give the importance of equipotential surfaces .What are dielectrics? Distinguish between polar and non -polar dielectric: . A metal plate is introduced between the plates of changed parallel plate capacitor. What is the effect on the capacitance of capacitor? What is internal resistance of a cell? Why the resistivity of a metal increases and that of a semi conductor decreases with rise in temperature. State Kirchhoft’s rules of current distribution in an electric Network ’l\

Posted by Js Prasath 7 years, 1 month ago

CBSE > Class 12 > Physics

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16. Prove that the current density of a metallic conductor is directly proportional to the drift speed of electrons 17. What is internal resistance of a cell? Derive the relation between r, E, V 18. Derive an expression for the capacitance of a paraliel plate capacitor. 19. Derive an expression for the electric potential at a point along the axial line of the dipole. . Three capacitors of capacitances 2 PF , 4PF, and 3PF are connected in parallel. What is the total capacitance of the combination? 20. Explain the effect of introducing a dielectric slab between the plates of a ll plate capacitor on its capacitance. Derive an expression for its capacitance with dielectric as the medium between the plates. 21. A) State the principle of potentiometer. Draw a circuit diagram used to compare the emf of two cells. Write. the formula used B) How can the sensitivity of a potentiometer be increased? 22. A) Deduce the condition for balance in a Wheatstone bridge. Using the principal of Wheatstone bridge describe, the method to determine the specific resistance of a wire in the laboratory. Draw the circuit diagram and write the formula used. B) Write any two important precautions you would observe while . performing the experiments.

Posted by Js Prasath 7 years, 1 month ago

CBSE > Class 12 > Physics

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Explain Faraday's laws of electromagnetic induction in simple words

Posted by Yo Yo Honey Singh ? 7 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Shreyas Trivedi 7 years, 1 month ago

In case of magnet the clock / anti clock rotations of magnetic waves attract or repel the electrons in an inactive circuit to generate current

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Shreyas Trivedi 7 years, 1 month ago

The laws say that when a circuit has current in it it can induce current in another closed circuit

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The open circuit terminal voltage of a source is 10 volt and it short circuit current is 4 ampere. what will be current when source is current a linear resistance of 2 ohms

Posted by Ankush Das 7 years, 1 month ago

CBSE > Class 12 > Physics

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Power of lence

Posted by Bhawana Soni 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Shreyas Trivedi 7 years, 1 month ago

Maybe the capacity to zoom or focus

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The electronic force of repulsion between two positively charged ions carring equal charges is 3×10^-8v when they are seperated by by a distance of 5aungrustm how many elecrons are missing out from each ion ?

Posted by Anuj Jat 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Anuj Jat 7 years, 1 month ago

Mile to answer type kar do

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prove that for a short magnetic dipole Bequatorial=1/2Baxial

Posted by Harpreet Kaur 7 years, 1 month ago

CBSE > Class 12 > Physics

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Find equivalent resistance of following fig..

Posted by Utkarsh Vaishya 7 years, 1 month ago

CBSE > Class 12 > Physics

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Find the equvilent resistance between A and B

Posted by Rajesh Kumar 7 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Shreyas Trivedi 7 years, 1 month ago

Yes what and where is structure?haha missing!! ;)

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Divya Nain 7 years, 1 month ago

Where is the structure

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Rajesh Kumar 7 years, 1 month ago

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How to find magnetic field

Posted by Smaira Kumari 7 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Shreyas Trivedi 7 years, 1 month ago

Refer text and your question want

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Shreyas Trivedi 7 years, 1 month ago

By applying various formulaes

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Cos2x +sin2x

Posted by Saurabh Jadaun 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Nishan Singh 7 years, 1 month ago

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State biot savart law and expression it in the vector form

Posted by Bhola Sharma 7 years, 1 month ago

CBSE > Class 12 > Physics

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a force f is applied to block 6 kg at rest on an inclined plane of inclination 30 degree the force f is horizontal and parallel to surface of inclined plane maximum value of f so that block remain at rest is 40N then find the coefficient of friction on the surface

Posted by Harshita Gupta 7 years, 1 month ago

CBSE > Class 12 > Physics

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Define columb's law

Posted by Manish Kumar 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Aryan Rajput 7 years, 1 month ago

The electrostatic force between two charges Q1 and Q2 is directly proportional to product of Q1*Q2 and is inversely proportional to the square of the distance separating them

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What electric current is scalar quantity?

Posted by Vikas Jaiswal 7 years, 1 month ago

CBSE > Class 12 > Physics