What is the work done in …

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\

Lota graph showing the variation of current with voltage for the materials gaas on the graph mark the reason where a resistance is negative and Om is obey

two pith -balls each weighing 10-³ kg are suspended from the same point by means of silk threads -0.5 m long .on charging the balls equally, they are found to repel each other to a distance of 0.2 m .calculate the charge on each ball .

Derivation of ohm's law class 12

A mirror is turned through 17 degree then the reflected ray is turned by

A Carbon resistor has three strips of red colour and a gold strip. What is the value of resistor? What is its tolerance?

Three charges q,-4q,2q are placed at vertex of equilateral triangle find amount of work done to make its set up

A pith ball may become charge d by gaining or losing

what us current

Q.3A Free Proton and a Free Electron are Placed in a Uniform Field. Which of the Two Experiences Greater Force and Greater Acceleration?

Two metallic sphere of radii 1 cm and 3 cm are given charge of minus 1 into 10 ke power 2 coulomb and 5 x 10 power 2 respectively if these are connected by conducting wire the final charge on the bigger sphere is