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sir,according to lenz's law, mecahanical energy is converted to electric energy.....nw , i switch on an electromagnet..n a coil is placed near it . induced current develops in it due to change of flux n continues until the current in the electromagnet gets to max. so, where did this induced current come from in this case.i didnt apply any mechanical work here , just switched on the switch, still we get an induced current

the momentum (m * v) changes by 20 %....what will b the change in its kinetic energy ' K= p² / 2m ' (sir, analytically, the ans comes as 44%, but plz do it by calculus method which gives ans as 40% and specify the rates with appropriate symbols in ur ans with details)

thanx 4 ur rep.but i think u got the lhs wrong.just check it again...

hey guys, m really struggling wid the funda of current distribution in cases of unsymmetrical wires. eg, 12 wires of resistance r make a cube. find eq. resistance betn 2 corners of same edge. somebody plz help me ................

12 equal wires of resistance r each are used to make a skeleton cube. negligible int resistance of the cell. find the eq. resistance along the two corners of the same edge. (plz giv a detaled soln. i cud not get the funda of distribution of current in the diff. wires , i.e,the concept of symmetry. so plz include the theory in ur ans)

a and b > 0: 0

P < 1.

Prove that (a+b)^p

a^p + b^p