Two metallic plates P and Q are separated by a distance of 0

Last updated: 6/9/2023

Two metallic plates P and Q are separated by a distance of 0 1 M These are connected through an ideal ammeter as shown in the figure A magnetic field B exists parallel to the plates A light of wavelengths between 4000 and 6000 fall on the plate Q whose work function is 2 39 eV Find the minimum value of magnetic field B for which the current registered by the ammeter is zero X X X X X Cow