A 650-nm continuous-wave laser beam strikes a photodetector. The photon arrival rate is 4x10^16 photons per second, resulting in 6x10^16 electrons per second being collected at the photodetector's positive contact (i.e.,anode).

1. What is the average received optical power in mW?

2. What is the average photocurrent in the external circuit?

3. What is the quantum efficiency of the photodetector?

4. What is the responsivity?

5. Does this photodetector exhibit photocurrent gain?

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What are some possible experimental errors for the Thermal Gravimetric Analysis (TGA), please explain in details

How do you calculate percent error from TGA? Do we use weight percent? Please explain and provide an example if possible.

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What is the importance of electr!cal isolation when interfacing microcontrollers to higher voltage inductive circuits (motors).? how can electrical isolation be achieved to protect the microcontroller and motor.?

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An LCD 16x2 display is used for PIC16F1619, if Port C is connected to 8 data pins of the LCD. Pin4 and 5 of port A are connected to EN and RS respectively. RW is tied to the ground. Write a C code to set up 2 lines, 5x8 matrix, 8-bit mode and force the cursor to the beginning of the first line.

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Use
a diagram to illustrate the flow of magnetic flux around a
transformer. Draw an equivalent circuit for this transformer and
explain how it relates to the practical transformer.

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The force exerted by an electric charge at the origin on a
charged particle at a point (*x*, *y*, *z*)
with position vector **r** = * <x*,

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What is the relation between the two outputs of 74ls151?Is ENABLE input active-HIGH or active-LOW? a) Identify the ENABLE pins for 74ls138 chip. Are these pins active-HIGH or active-LOW? Are the outputs of 74ls138 active-HIGH or active-LOW? c) When used as an octal decoder, this IC converts what type of input code into a corresponding activated output? d) When used as a DEMUX, which input(s) may be used as a data line and be distributed to the output?

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A load supplied by a 3-wire d.c. distribution system takes a current of 600 A on the +ve side and 480 A on the −ve side. The resistance of the outer conductor is 0·015 Ω and that of the middle wire is 0·03 Ω. Determine the voltage at the load end between each outer and middle wire. Supply voltage is 500/250 V

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Design a 5 bit binary counter on logicly?

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Please discuss the definition and theory on Power amplifier and phase lock loop with diagrams

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Transformer and Auto Transformer

Q1: What do I need to know to solve Ideal Transformer, Transformer, and autotransformer problems?

Q2: What does it mean referred to primary or secondary side?

Q3: How to draw phasor diagram ?

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Q3/ Draw the out voltage and current waveforms of a single-phase cycloconverter connected to a purely resistive load. The following information could be useful: Load Supply Voltage, Supply Frequency Output Frequency Firing Angle At 202 230Vrms, 50 Hz 12.5 1300 sec Your drawing should contain all the detaiks including Amplitudes, Time, Degrees and Axis Names,

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For a signal x(n)=sin(2*pi*n/5) defined for n=0to7, evaluate the Fast Fourier Transform using signal flow graph. (Use decimation in Time Algorithm).

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NB: may you please explain the phasor diagram used to get the
reactance. draw phasor gor both scenario. That will be highly
appreciated.

5. A given 3-MVA, 50-Hz, 11-kV, 3φ, Y-connected alternator
when supplying 100 A at zero p.f. leading has a line-to-line
voltage of 12,370 V; when the load is removed, the terminal voltage
falls down to 11,000 V. Predict the regulation of the alternator
when supplying full-load at 0.8 p.f. lagging. Assume an effective
resistance of 0.4 Ω per phase. [13.5%]

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From 1+K*L(s)=0

L(s) = 1/((s+1)(s+2)(s+10))

Solve for gain K where the root locus passes through the damping ratio. z=0.176. With out Matlab. Please show all work.

Note: I know we need to use some trig and the magnitude criteria but u cannot seem to figure it out. Thank you!

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