Question 1 a) Determine the concentration of free electrons and holes at 300 K for a silicon sample 2 x 10¹4 atoms/cm³ and acceptor atom = which has a donor atom concentration of ND concentration of N₁ = 3 x 10¹4 atoms/cm³. b) Repeat the problem for NA-ND = 10¹5 atoms/cm³. c) Repeat the problem for ND = 10¹6 atoms/cm³ and NÃ= 10¹4 atoms/cm³.

12.a. You're working on an installation at a patient care facility. You have two panelboards next to eachother that supply the critical and the normal feeder circuits. These two panelboards must be bondedtogether using an insulated copper conductor with a minimum size ofA. AWG 10.B. AWG 6.C. AWG 8.D. AWG 4. 12.b. You're installing an isolated power system in a hospital that'll serve a group of patient care areas. Whichof the following colors must be used for the wire that connects to the terminal at each receptacle that'susually reserved for the neutral conductor?A. Green with a white stripeB. Orange with a distinct stripeC. Red with a black stripe

difference betwwen substation and transmission.

uunection current 0.5mA is to be used. 02: a) Derive the equations of balance for Hay bridge to determined unknown impedance (R+ joL.), also draw the general circuit. ist the methods which there are used to measure unknown resistance. Then sketch and explain one of them.