IMPORTANT QUESTIONS CURRENT ELECTRICITY ( ASSIGNMENT)

1.A wire of resistivity 'P' is stretched to twice its length .will be its new resistivity ?

2. What happens to the power dissipation, if the value of electric current passing through a resistance is halved ?

3. Two conductors , one having resistance R and another 2R, are connected in turn across a d.c. source.If the rate of heat produced in the two conductors is Q 1 and Q 2 Respectively, what is the value of of Q 1 /Q 2 ?

4. How does the drift velocity of electrons in a metallic conductor very with increase in temperature ?
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IMPORTANT QUESTIONS FOR WAVE OPTICS AND OPTICAL INSTRUMENTS(ASSIGNMENT)

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Electrostate Assignment 2

Question 1. (1 )Define electric flux , write its SI unit . (2)The electric field components due to a charge inside the cube of side 0.1m are shown below E x =αx , where α =500N/C-m E Y =0,E Z =0 Calculate (a) The flux through the cube (b)the charge inside the cube Question 2. A uniformly charged conducting sphere of 2.5 m in diameter has a surface charge density of 100µC/m 2 . Calculate the (a) charge on the surface and (b)Total electric flux through the surface. Question 3. A small metal sphere carrying charge +Q is located at the centre of a spherical cavity in a large uncharged metal sphere as shown in fig . Use Gauss’s theorem to find electric field at points p1 , p2. Also draw the pattern of electric field lines in this arrangement. TO DOWNLOAD FULL ASSIGNMENT, CLICK HERE. Download Assignment 1

GravitationTest paper-1

Gravitation test -1

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