1.

(A): If a current flows through a wire of non uniform cross-section,potential difference per unit length of wire in direction of current is same at different points (R): ohms law V = iR is not valid for a wire of non-uniform cross-section

Answer»

Both 'A' and 'R' are TRUE and 'R' is the correct EXPLANATION of 'A'
Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A'
'A' is true and 'R' is FALSE 
'A' is false and 'R' is false 

Answer :D


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