Question

Question 1: multiple-choice questions. 1) For northem hemisphere at solar noon, knowing that solar altitude can be written as sin sin o · sin 8 + cos o cos 8; from January 1" to February 28", Ys in northern hemisphere at solar po D. depends on the latitude A. will increase B. will decrease C. not sure 2) For a region (longitude x in degrees) using local time = UTC + y where y is in hours, the LST will be ahead of local time if D.> 15 B.< 15 A.< 15 c> 15 3) On cloudy days, which of the following statements about two identical PV modules with and without tracking system is correct? A. The power of the PV with tracking is always higher B. The power of the PV with fixed tilt is always higher C. The power of the PV with tracking is higher in early morning D. The power of the PV with fixed tilt is higher in early morning 4) Which of the following condition will always increase the intrinsic carrier concentration n,? A. Both temperature and bandgap increase B. Both temperature and bandgap decrease C. Temperature increases and bandgap decreases D. Temperature decreases and bandgap increases 5) Which of the following designs is sensitive to wavelength? A. Buried contact B. Anti-reflection coating C. Point contact D. Surface texturizing 6) Which of the following statements about charge controllers is correct? A. Shunt charge controller cannot automatically reset if the battery is depleted B. Series charge controller is more widely used C. Series charge controller has no losses during charging due to voltage drop on MOSFET D. The switch for PV is off during charging in shunt charge controller 7) A buck converter is controlled by a switching signal as shown below. If the output voltage is 12 V, the value of the input voltage is High level Low level 3. B. 4 V С.З V D. 36 V A. 48 V 8) The top subcell (facing sunlight) in a tandem solar cell A. should have the highest bandgap B. should have the lowest bandgap C. has the lowest efficiency in all sub-cells D. has the highest efficiency in all sub-cells 9) The component in an inverter responsible for generating smooth sine waves from pulse signals with various widths is C. Rectifier D. Low-pass filter B. Body-diode A. Flip bridge 10) Minimal DC cabling can be found in C. Micro-inverter D. None of the above A. Central inverter B. String inverter Page 2 of 6 Solar PV Systems (0406320)

Please show the method of solving :)

Answer 1

1. D.depends on latitude 3. د 5. A. The power of the pv with tracking is always higher c. Temperature increases and Band Gap decreases Burich contact Surface texturizing C Series charge controller has no losses during charging due to Voltage chop on MOSFET. A.48 [ Vo = DVS ف - 7 0:2 ) 8. Dela Tority - 0.28 Vs 2 12 cuou A. Should have the highest Bandgap D. Low pass filter c. Micro-inverter 9. 1o.