Question

52.In a moving coil Galvanometer, a coil
of area 2.2 x 104 m2 having 100 turns is
suspended freely in a magnetic field of
0.5 T. A deflection of 7° is produced when
current of 1uA flows through the coil. The
couple per unit radian is
1)9x10-N-m/rad 2)9x10--N-m/rad
3)9x10-'N-m/rad 4)9x10-6N-m/rad​

Answer 1

Explanation:

Given .In a moving coil Galvanometer, a coil of area 2.2 x 10^-4 m^2 having 100 turns is suspended freely in a magnetic field of 0.5 T  A deflection of 7° is produced when  current of 1uA flows through the coil. The  couple per unit radian is

• Given the number of turns in a moving coil galvanometer is 100.  
• Now we need to find the value of the constant k
• So the relation is given by I = k / nAB θ
• Where A is area, B is magnetic field and θ will be the angle.
• Now k = I n A B / θ
•           = 1 x 10^-6 x 100 x 2.2 x 10^-4 x 0.5 / 0.1221 (Since 7 degree = 0.1221 Radians)
•          = 110 x 10 ^-10 / 0.1221
•          = 9 x 10^-8 N – m / rad

Reference link will be

https://brainly.in/question/16068998