The magnitude of the earth's magnetic field at a place is B₀ and the angle of dip is $\delta .$ A horizontal conductor of length l lying along the magnetic north-south moves eastwards with a velocity v. The emf induced across the conductor is

• A

  Zero

• B

  ${\mathrm{B}}_0\mathrm{lvsin\delta }$

• C

  ${\mathrm{B}}_0\mathrm{lv}$

• D

  ${\mathrm{B}}_0\mathrm{lvcos\delta }$