The current-loop PQRSTP formed by two circular segments of radii `R_(1)` and `R_(2)` carries a current of I ampers. Find the magnetic field at the common centre O. what will be the field if angle `alpha = 90^(@)` ?

The circular loop PQRSTP formed by two circular segments of radii R_1 and R_2 , carries a current I . What is the magnetic field induction at the centre O? What will be the magnetic field induction at O if alpha=90^@ ?

A wire loop formed by joining two semicircular wires of radii R_1 and R_2 carries a current I as shown in figure. Find the magnetic field induction at the centre O.

The current loop abcde formed by two circular segments of radii r_1(=4cm) and r_2(=6cm) with common centre at O, carries a current I(=2A) as shown in figure. What is the magnetic field at the common centre O? What will be the value of magnetic field at O when theta=90^@ ?

Two wire loop PQRSP formed by joining two semicircular wires of radii R_(1) and R_(2) carries a current i as shown in the figure given below. What is the magnetic field induction at the centre O in cases (A) and (B) ?

A square loop of side a carris a current I . The magnetic field at the centre of the loop is

A circular loop of radius 9.7 cm carries a current 2.3 A. Obtain the magnitude of the magnetic field at the centre of the loop .

A square loop of edge 'a' carries a current l. The magnetic field at the centre of loop is

A long wire having a semi-circular loop of radius r carries a current I, as shown in Fig. Find the magnetic field due to entire wire.