An airplane is flying through a thundercloud at a height of 2000m (this is very dangerous thing to do because of updrafts, turbulence, and the possibility of electric discharge). if there are charge concentrations of 40.0 c at a height of 3000 m within the cloud and of -40.0 c at a height of 1000m, what is the electric field e at the aircraft?

Answer

In this question we have given,

Height of plane, h1=2000m

Height at which charge concentration is 40C, h2=3000m

Height at which charge concentration is -40C, h3=1000m

charge concentaration, q1=40C

charge concentaration, q2=-40C

let the charge concentrations at height h2 and h3 as point charges

Now we will first find the electric feild on plane due to positive charge q1=40

Here k=8.98755*10^9N.m^2/C^2

q1=40C

put values of k, q1 , h1 and h2 in equation 1

\\

V/m" alt="E1=(8.98755*10^9)*(40)/(2000-3000)^2" />\\

V/m" />

similarly electric feild due to negative charge q2=-40

\\

Total electric feild E at the aircraft is given as

...............(2)

Put values of  E1 and E2 in equation2

therefore s Total electric feild E at the aircraft is E= 719004V/m

conservation of mass

mass before something happens = mass afterwards

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