Astraightwireofdiameter0.5mmcarrying a current of 1 A is replaced by the another wire of 1 mm diameter carrying the same current. The strength of the magnetic field far away is
Text Solution
Verified by ExpertsThe correct answer is:
D
Diameter of first wire 
0. 
; Current in first wire 
; Diameter of second wire 
mm and current in second wire 
Strength of magnetic field due to current flowing in a conductor, 
or 
Since the current in both the wires is same, therefore there is no change in the strength of the magnetic field.
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