Q 1 :    

An emf is generated by an ac generator having 100 turn coil, of loop area 1 m2. The coil rotates at a speed of one revolution per second and placed in a uniform magnetic field of 0.05 T perpendicular to the axis of rotation of the coil. The maximum value of emf is              [2023]

  • 3.14 V

     

  • 31.4 V

     

  • 62.8 V

     

  • 6.28 V

     

(2)

The revolution is equal to 2π radian. Therefore, angular velocity, ω=2π rad/s. Induced emf is given as, εmax=NBAω=100×0.05×1×2π=10π=31.4 V