Question

plz answer 1st and 3rd one .I will mark as brainilest​

Answer 1

Answer:

single-electron transistor (SET) is a sensitive electronic device based on the Coulomb blockade effect. In this device the electrons flow through a tunnel junction between source/drain to a quantum dot (conductive island). Moreover, the electrical potential of the island can be tuned by a third electrode, known as the gate, which is capacitively coupled to the island. The conductive island is sandwiched between two tunnel junctions, [1] which are modeled by a capacitor ( {\displaystyle C_{\rm {D}}} {\displaystyle C_{\rm {D}}} and {\displaystyle C_{\rm {S}}} {\displaystyle C_{\rm {S}}}) and a resistor ( {\displaystyle R_{\rm {D}}} {\displaystyle R_{\rm {D}}} and {\displaystyle R_{\rm {S}}} {\displaystyle R_{\rm {S}}}) in parallel.