Question

An aeroplane, in which the distance between the tips of the wings is $50m$, is flying horizontally with a speed of $360$ km/hour, over a place where the vertical component of earth's magnetic field is $2.0\times {10}^{-4}tesla$ . The potential difference between the tips of the wings would be

• A. $0.1V$
• B. $0.5V$
• C. $0.2V$
• D. $1.0V$

Answer 1

Answer: (D)

$1.0V$

Given : We have distance between tip of wings=50m

Velocity=360km/hour $\to$v=100m/sec

B=$2\times {10}^{-4}$

Solution:

We have a formula for finding potential diffrence between two points at a distance $l$ apart as E=$Blv$

Where B= magnetic field, $l$=distance between two points , v=velocity

Substituting all the values in the formula we get $E=2\times {10}^{-4}\times 50\times 100$

E=1 volt

The correct opt : D