The work done by a force `vec(F)=(-6x^(3)hat(i))` N in displacing a particle from x = 4m to x = - 2m is

Options

A. `-240 J`
B. `360 J`
C. `420 J`
D. will depend upon the path

Answer

A

Explanation

The circuit is in resonance `(becauseV_(1)=V_(2))`
`R=(V)/(l)=(120sqrt(2))/(10)=10sqrt(2)Omega`
Q factor = `(1)/(R )sqrt((L)/(C))=(1)/(10sqrt(2))xxsqrt((2xx10^(-3))/(0.8xx10^(-6)))=(1)/(10sqrt(2))xxsqrt((2xx10^(4))/(8))=(50)/(10sqrt(2))=(5)/(sqrt(2))`