An aircraft with a wingspan of 40 m flies with a speed of 1080 km/hr in the eastward direction at a constant altitude in the northern hemisphere, where the vertical component of the earth's magnetic field `1.75 xx10^(-5)` . Then the emf developed between the tips of the wings is

Options

A. `0.34`V
B. `2.1`V
C. `0.5`V
D. `0.21` V

Answer

D

Explanation

The emf developed between the tips of the wings is
` epsilon = B_(v)lv `
Here ,
`Bv= 1.75 xx10^(-5) T , l = 40 m `
` v = 1080 "km/hr" = 1080 xx 5/18 " ms"^(-1)`
= 0.21 V