ICSE Class 10 Physics Ohm's Law
 Practically,why does current decrease if length of conductor increases?
 Find the magnitude of current through the 4\OmegaΩ resistor in the circuit shown.

Find the resistance between A and B.
 calculate the resistance of 1km long copper wire of radius 1mm
 what is ohm law ?

exercise 8a numerical 12
 exercise 8A numerical 10

exercise 8a numerical 8

exercise 8a numerical 8
 I had a query in th following question: A given wire of resistece is stretched to double its length. What will be its new resistance? How come the answer is 4 ?