1.

The resistance of a 5 cm long wire is 10 W.  It is uniformly stretched so that its length becomes 20 cm.  The resistance of the wire is                                                                [MH CET 2002]

A.            160 W                                      
B.            80 W
C.            40 W                                        
D.            20 W
Answer» B.            80 W


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