Match the following
List I | List II | ||
---|---|---|---|
I. | Helical virus | A. | Bacteriophage |
II. | Glycoprotein | B. | Rabies virus |
III. | Complex viruses | C. | Influenza virus |
IV. | Enveloped virus | D. | Measles virus |
You are given a dipole of charge \( +q \) and \( -q \) separated by a distance \( 2l \). A sphere 'A' of radius \( R \) passes through the centre of the dipole as shown below and another sphere 'B' of radius \( 2R \) passes through the charge \( +q \). Then the electric flux through the sphere A is