A circular coil of one turn in formed by a "6.28m" length wire,which carries a current of "3.14A".The magnetic field at the centre of coil is -

(1) `1times10^(-6)`T

(2) `4times10^(-6)`T

(3) `0.5times10^(-4)`T

(4) `2times10^(-6)`T

A circular coil of radius 10 cm having 100 turns carries a current of 3.2 A. The magnetic field at the center of the coil is

A circular coil of wire consisting of 100 turns each of radius 9 cm carries a current of 0.4 A. The magnitude of the magnetic field at the centre of coil is [ mu_(0) = 1256 xx 10^(-7) Sl unit]

A circular loop of diameter 80 cm carries a steady current 2 A. The magnetic field intensity at the centre of the loop is _________ xx10^(-6) T . (Permeability of vacuum mu_(0)=4pixx10^(-7) N//A^(2) , Take pi=3.14 )

A current of 2 A is made to flow through a coil which has only one turn. The magnetic field produced at the centre is 4pi xx 10^(-6) "Wb"//m^(2). the radius of the coil is

A vertical circular coil of one turn and radius 9.42 cm is placed with its plane in the magnetic meridian and short magnetic needle is pivoted at the centre of the coil so that it can freely rotate in the horizontal plane. If a current of 6A is passed through the coil, then the needle deflects by (B_(H) = 4 xx 10^(-5)T)

A solenoid of length 0.4 m and diameter 0.6 m consists of a single layer of 1000 turns of fine wire carrying a current of 5.0xx10^(-3) ampere.The magnetic field strength on the axis at the middle is pi/Nxx10^(-5)T , then find value of N .

A circular coil of 20turns and radius 10cm carries a current of 5A . It is placed in a uniform magnetic field of 0*10T . Find the torque acting on the coil when the magnetic field is applied (a) normal to the plane of the coil (b) in the plane of coil. Also find out the total force acting on the coil.

A circular coil of 25 turns and radius 12 cm is placed in a uniform magnetic field of 0.5 T normal to the plane of the coil. If the current in the coil is 6 A then total torque acting on the coil is

A current - carrying circular coil of 100 turns and radius 5.0 cm produces a magnetic field of (6.0 xx 10 ^-5) T at its centre. Find the value of the current.

A rectangul ar coil of wire of 100 turns and 10 xx 15cm^(2) size carrying a current of 2Amp. is in a magnetic field of induction 2 xx 10^(-3)wb//m^(2) . If the normal drawn to the plane of the coil makes an angle 30° with the field, then the torque on the coil is