A length of wire carries a steady current. It is bent first to form a circular plane coil of one turn. The same length is now bent more sharply to give a double loop of smaller radius. The magnetic field produced at the centre produced by same current is______
A. unaltered
B. a half of its initial value
C. a quarter of its initial value
D. four times of its first value
Answer:D
A length of wire carries a steady current. It is bent first to form a circular plane coil of one turn. The same length is now bent more sharply to give a double loop of smaller radius. The magnetic field produced at the centre produced by same current is______
A. unaltered B. a half of its initial value C. a quarter of its initial value D. four times of its first value