At T 400K, what the concentration of free electrons / holes in intrinsic silicon? 1.5x1010/cm3 5.16x 1012/cm³ 5.16x 10-12/cm3 1.5x 10-10/cm

2. A bank of nickel-cadmium cells is used as the emergency lighting supply for a hospital. There are 100 cells connected in series and each has an A-hr rating of 120 A-hr. The bank has to be replaced, and the manufacturer is no longer supplying nickel-cadmium cells. It is decided to replace the cells with lead-acid cells. How many lead-acid cells will be required if each has an A-hr rating of 60 A-hr, and how should they be connected?

The following elements are shown in the circuit in the figure R1 = 10, R2 = 10, R3 = 5 and R4 = 5, which must be calculated using the multiplication factor 1.2 [kQ]. It is also known that C1 = 6 [uF], C2 = 12 [µF], ɛ1 = 60 [V] and ɛ2 = 10 [V]. Considering that the switch closes at t = 0 [s] while the capacitors are found downloaded. Determine for a time equal to the time constant of the circuit (t = t [s]): a. The energy dissipated per second in resistor R1. b. The potential difference between points “a" and "d", that is, Vad. c. Graph and analyze the voltage of the capacitor from the moment the switch and considering that after 5 time constants it reopens and remains open. Consider that the capacitors begin to discharge when opening the switch.

Based on this diagram, complete the following timing diagrams. x transition occurs on the falling edge of the clk. Initial state is 00.Timing diagram is for clock cycles 1-4. Please go into one of the diagrams in thorough written detail so I may understand it. Schematic, and state diagram included. | no clk 0/0 0/0 1/0

D 68.2 V O 184.8 V What is the use of the tool marked in the figure? O To remove insulation layer O To cut the wire O To tighten the screws O To joint two wires 7 In the distribution board is used to protect human from the electric shock 31°C Sunny A O D 0) prt sc delete home backspace 8 PI C

Find the value of the load resistance for maximum power transfer

A Platinum RTD thermometer has a resistance of 136 ohms at 90 degrees celsius,if it's resistance increases to 280 ohms when it is in contact with hot gas. Determine the temperature of the gas. Take the resistance of RTD to be 100 ohms at 0 degrees celsius

Total current?

Experiment Load charla cterislics of the sepavately exicited Draw the characteristics tabulatedin the table graphically? D.c motor n/r.p.m 1990 TINM O-25 1970 O.5 1960 0.75 1940 1.0 1920 1.25 1900 1. 5 1४१० 1.75 1880 2.0 1850

(iii) Having determine the unknown resistance in (ii), you decide to adjust the variable to equal that of Roc. determine across the galianometa the potential difference across the resistance