Consider a uniform magnetic field that is perpendicular to the plane of the area of a circular coil having a radius of 5 cm, moving with a speed of 5 m/s parallel to the magnetic field. Determine the induced emf in the coil if the speed and magnetic field are both doubled.

• A. emf is zero
• B. emf is 100 mV
• C. emf is maximum
• D. cannot be determined

Answer: (A)