Two concentric coils of 20 turns each are situated in the same plane. – McqOptions

MCQOPTIONS

1.	Two concentric coils of 20 turns each are situated in the same plane. Their radii are 60 cm and 80 cm and they carry currents 0.4 A and 0.5 A respectively in opposite directions. Calculate the magnetic field at the center.
A.	( frac {5 mu_0}{4} )
B.	( frac {5 mu_0}{6} )
C.	( frac {5 mu_0}{8} )
D.	( frac {5 mu_0}{10} )
Answer» C. ( frac {5 mu_0}{8} )

Discussion

No Comment Found

Related MCQs

A rectangular coil, of sides 4 cm and 5 cm respectively, has 50 turns in it. It carries a current of 2 A, and is placed in a uniform magnetic field of 0.5 T in such a manner that its plane makes an angle of 60o with the field direction. Calculate the torque on the loop.
A solenoid has core of a material with relative permeability 200 and its windings carry a current of 2 A. The number of turns of the solenoid is 200 per meter. What is the magnetization of the material?
A long solenoid has 500 turns per cm and carries a current I. The magnetic field at its center is 7.54 10-2 Wb m-2. Another long solenoid has 300 turns per cm and it carries a current ( frac {I}{3} ). What is the value of magnetic field at the center?
Magnetic field in toroid is stronger than that in solenoid.
Two concentric coils of 20 turns each are situated in the same plane. Their radii are 60 cm and 80 cm and they carry currents 0.4 A and 0.5 A respectively in opposite directions. Calculate the magnetic field at the center.
A solenoid of 0.5 m length with 100 turns carries a current of 5 A. A coil of 20 turns and of radius 0.02m carries a current of 0.6 A. What is the torque required to hold the coil with its axis at right angle to that of solenoid in the middle point of it?
Pick out the expression for magnetic field inside a toroid from the following.