Two circular coils are made of two identical wires of same length and carry same current. If the number of turns of the two coils are 4 and 2, then the ratio of magnetic induction at the centres will be

Two circular coils are made of two identical wires of the same length. If the number of turns in the two coils are 4 and 2, then the ratio of magnetic inductions at the centre will be

A coil one turn is made of a wire of certain lenghth and then from the same length a coil of two turns is made. If the same current is passed both the cases, then the ratio of magnetic induction at there centres will be

A coil one turn is made of a wire of certain lenghth and then from the same length a coil of two turns is made. If the same current is passed both the cases, then the ratio of magnetic induction at there centres will be

Two circular coils are made of two identicle wires of length 20 cm. One coil has number of turns 9 and the other has 3. If the same current flows through the coils then the ratio of magnetic fields of induclion at their centres is

Two identical wires each of length L are bent to form a circular loop and a square loop. If the same current i flows in the two wires, then the ratio of the magnetic inductions at the centre of the circular and square loops is :

Two flat circular coils A and B are made from two identical copper wires, each of length 50 cm. If the number of turns inA and B are 6 and 3 respectively, and the same current flows though them, then the ratio of the magnetic fields at the currents of A and B will be

A wire of length l is bent into a circular coil of one turn of radius R_(1) . Another wire of the same material and same area of cross-section and same lengths is bent into a circular coil of two turns of radius R_(2) . When the same current flows, through the two coils, the ratio of magnetic induction at the centres of the two coils is

When a long wire carrying a steady current is best into a circular coil of one turn, the magnetic induction at its centre is B. When the same wire carrying the same current is bent into a circular coil of one turn, the magnetic induction at its centre is B. when the same wire carrying the same current is bent to form a circular coil of a turns of a smaller radius, the magnetic induction at the centre will be

Two coils are made of copper wires of same length in the first coil the number turns is 3n and radius is r. In the second coil number of turns is n and radius is 3r the ratio of self inductances of the coils will be :-