A helicopter has blades of length 4.0 m rotating at 3.0 rev/s in a horizontal plane. If the vertical component of the Earth’s magnetic field is 6.5 105T, what is the induced emf between the tip of a blade and the hub?

Induced emf,

Explanation:

Given that,

Length of the helicopter, l = 4 m

Angular speed of the helicopter,

The vertical component of the Earth’s magnetic field is,

We need to find the induced emf between the tip of a blade and the hub. The induced emf in terms of angular velocity of an rotating object is given by :

So, the induced emf between the tip of a blade and the hub is . Hence, this is the required solution.

if they have a finite resultant