question_answer

A wire in the form of a circular loop of one turn carrying a current produces a magnetic field B at the centre. If the same wire is looped into a coil of two turns and carries the same current, the new value of magnetic induction at the centre is                                                           [CBSE 2002; KCET 2003]

A)            \[5B\]                                      

B)            \[3B\]

C)            \[2B\]                                      

D)            \[4B\]