Question

An airplane in which the distance between the tips of the wings is 50 meter is flying horizontally with a speed of 360 km/hour over a place where the vertical component of earths magnetic field is $2.0\times {10}^{-4}Testa.$ The potential difference between the tips of the wings would be:-

• A. 0.1 V
• B. 1.0 V
• C. 0.2 V
• D. 0.0 V

Answer 1

The correct option is B 1.0 V

A. $0.1V$

Given,

$B=2.0\times {10}^{-4}Tesla$

$l=50meter$

$v=360km/hour=360\times \frac{5}{18}=100m/s$

The potential difference between the tips of the wings is,

$\epsilon =Blv$

$\epsilon =2.0\times {10}^{-4}\times 50\times 100$

$\epsilon =1V$