- AGauss's law in electrostatics and Gauss's law in magnetism
- ✓Faraday's law and Ampere' law
- CGauss's law and Ampere's law
- DGauss's law and Faraday's law
Maxwell added the concept of displacement current in AMpere Circuit Law which governs the conduction in the wire of conduction current. After the deviation compass between capacitor Maxwell thought of magnetic lines which would be the result of varying current known as displacement current. So by continuing the displacement in Amperes law, Maxwell was able to show the result of Amperes conduction in circuit moving electrons and also the result of faraday generation of $ME$ waves.
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$A:$ The width of the depletion layer in a $P-N$ junction diode increases in forwards bias
$B:$In an intrinsic semiconductor the fermi energy level is exactly in the middle of the forbidden gap

(Assume efficiency of photo emission $=10^{-3}\,\%$, i.e. number of photoelectrons emitted are $10^{-3}\,\%$ of number of photons incident on metal)