The magnitude of the earth's magnetic field at a place is `B_(0)` and angle of dip is `delta.` A horizontal conductor of lenth/lying along the magnetic north-south moves eastwards with a velocity v. The emf induced acroos the coductor is

Options

A. zero
B. `B_0//v`
C. `B_0//v sin del`
D. `B_0//v cos del `

Answer

C

Explanation

The vertical component of the earth.s magnetic field is `B_V = B_0sin delta`. A conductor lying north-south moving horizontally is normal to `B_V` . The emf induced is `epsi = B_0 l v sin delta `