[" In a region where intensity of electric field is "],[5NC^(-1),40" lines of electric force are crossing "],[10NC^(-1)" will be "],[[" 1) "20," 2) "80," 3) "100," 4) "200]]

In a region where intensity of electric field is 5NC^(-1)40 lines of electric force are crossing per square metre. The number of lines crossing per square metre where intensity of electric field is 10NC^(-1) will be

In a region where intensity of electric field is 5 NC^-1 , 40 lines of electric force are crossing per square metre. The number of lines crossing per square metre where intensity of electric field is 10 NC^-1 will be :

An alpha -particle is situated in an electric field of 1.5xx10^(5) NC^(-1) . Determine the force exerted on it.

In a region, the intensity of an electric field is given by vecE=2hati+3hatj+hatk in NC^(-1) . The electric flux through a surface vecS=10hatim^(2) in the region is

An electron falls freely in electric field of 9.1 xx 10^3 NC^(-1) , then acceleration of electron is .......

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

The electric field at (30, 30) cm due to a charge of -8nC at the origin in NC^(-1) is