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A small coil  with  turns is mounted on one end of a balance beam and introduced between the poles of an electromagnet as shown in the figure. The area of the coil is  , the length of the right arm of the balance beam is  cm . When there is no current in the coil the balance is in equilibrium. On passing a current  mAthrough the coil, equilibrium is restored by putting an additional weight of mass  mg on the balance pan. Find the magnetic induction field (in terms of  T) between the poles of the electromagnet, assuming it to be uniform


Question ID - 153955 | Toppr Answer

A small coil  with  turns is mounted on one end of a balance beam and introduced between the poles of an electromagnet as shown in the figure. The area of the coil is  , the length of the right arm of the balance beam is  cm . When there is no current in the coil the balance is in equilibrium. On passing a current  mAthrough the coil, equilibrium is restored by putting an additional weight of mass  mg on the balance pan. Find the magnetic induction field (in terms of  T) between the poles of the electromagnet, assuming it to be uniform

1 Answer - 5876 Votes

3537

Answer Key : (4) -

(4)

Magnetic torque

Gravitational torque

For equilibrium

 T



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