In a region, where electric field intensity is 5 N/C, 50 electric lines of force are crossing per sq. metre. The number of electric lines of force crossing perr sq. metre where electric field intensity is 20 N/C, will be

Options

A. 50
B. 100
C. 200
D. 150

Answer

C

Explanation

No. of lines of force`prop`Field intensity (E)
`therefore (N_(2))/(N_(1))=(E_(2))/(E_(1)) therefore N_(2)=50xx(20)/(5)=200`