A 20-turn wire coil of radius 7.5 cm rotates around its own diameter (i. e. around an axis in the plane of the coil that cuts it in half) in a uniform magnetic field of magnitude 0.6 T. To produce a maximum induced emf of 2.0 V in the coil it should rotate at angular frequency

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explanation:

does anyone know or what?

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards