Two circular coils 1 and 2 are made from the same wire but the radius of the 1st coil is twice that of the 2nd coil. What is the ratio of potentail difference applied across them so that the magnetic field at their centres is the same?

Two circular coils P and Q are made from similar wire but radius of Q is twice that of P . Relation between the values of potential difference across them so that the magnetic induction at their centers may be the same is

Two coils are made of same material such that radius of one coil is twice of the other and magnetic field is same at the centres then ratio of potential difference applied across 1^st to second coil is

Two circular coils are made from a uniform wire the ratio of radii of circular coils are 2.3 & no. of turns is 3:4. If they are connected in parallel across a battery. A.: Find ratio of magnetic induction at their centres. B: Find the ratio magnetic moments of 2 coils

Two circular coils are made from a uniform wire the ratio of radii of circular coils are 2:3 & no. of turns is 3:4 . If they are connected in parallel across a battery. A: Find ratio of magnetic inductions at their centres B: Find the ratio magnetic moments of 2 coils.

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