0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Question

A small coil C with N=200 turns is mounted on one end of a balance beam and introduced between the poles of an electromagnet as shown in fig. The area of the coil is S=1cm2, the length of the right arm of the balance beam is l=30cm. When there is no current in the coil the balance is in equilibrium. On passing a current I=22mA through the coil, equilibrium is restored by putting an additional weight of mass m=60 mg on the balance pan. Find the magnetic induction field (in terms of ×10−1T) between the poles of the electromagnet, assuming it to be uniform :

Solution
Verified by Toppr

Torque on the loop due to magnetic field τm=NISBsin90∘Torque due to extra weight added τg=(ΔM)glEquating both torques, NISBsin90∘=(ΔM)gl∴B=(ΔM)glNIS=(60×10−6)×9.8×(30×10−2)200×(22×10−3)=0.4T=4×10−1THence, the magnetic field in units of 10−1T is 4.

0
Similar Questions
Q1
A small coil C with N=200 turns is mounted on one end of a balance beam and introduced between the poles of an electromagnet as shown in fig. The area of the coil is S=1cm2, the length of the right arm of the balance beam is l=30cm. When there is no current in the coil the balance is in equilibrium. On passing a current I=22mA through the coil, equilibrium is restored by putting an additional weight of mass m=60 mg on the balance pan. Find the magnetic induction field (in terms of ×101T) between the poles of the electromagnet, assuming it to be uniform :

View Solution
Q2
A small coil C with N = 200 turns is mounted on one end of a balance beam and introduced between the poles of an electromagnet as shown in figure. The cross sectional area of coil is A=1.0cm2, length of arm OA of the balance beam is When there is no current in the coil the balance is in equilibrium. On passing a current I = 22 mA through the coil the equilibrium is restored by putting the additional counter weight of mass Δm=60mg on the balance pan. Find the magnetic induction at the spot where coil is located.

View Solution
Q3
A small coil C with N=200 turns is mounted on one end of a balance beam and introduced between the poles of an electro-magnet as shown in figure above. The cross-sectional area of the coil is S=1.0cm2, the length of the arm OA of the balance beam is l=30cm. When there is no current in the coil the balance is in equilibrium. On passing a current I=22mA through the coil the equilibrium is restored by putting the additional counterweight of mass Δm=60mg on the balance pan. The magnetic induction at the spot where the coil is located is given as x10T

View Solution
Q4
A rectangular coil of conductor ABCD with the length AD=3 and breadth DC=2 mis hung from one of the arms of a balance, as shown in the Figure. A current I=8 A is passed through the coil. When the magnetic Field turned off, a mass M kg is added to the pan of other arm to balance the coil. When the magnetic field of strength 0.4 T is switched on then, the system is

View Solution
Q5
A rectangular coil ABCD is hung from one side of a balance as shown in the figure. A 500g mass is added to the other arm to balance the weight of the coil. A current of 9.8A is passed through the coil and a constant magnetic field of 0.4T acting inward (in xz plane) is switched on such that only arm CD of length 1.5cm lies in the field. The additional mass m must be added to regain the balance is

View Solution