In a region where intensity of electric field is `5NC^(-1)40` lines of electric force are crossing `10NC^(-1)` will be

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 :

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

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

The electric potential on the surface of a sphere of radius R and charge 3xx10^(-6) C is 500 V The intensity of electric field on the surface of the sphere ( in NC^(-1)) is

The electric potential on the surface of a sphere of radius R and charge 3xx10^(-6) C is 500 V The intensity of electric field on the surface of the sphere ( in NC^(-1)) is

In a region of free space the average electric field of an electromagnetic wave is 9 xx 10^-4 NC^-1 . What is the magnetic field in that region?

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