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The current of an ideal p-n junction under illumination can be described by:
J(V)=J0(eqVkT-1)-Jph
where J0 is the saturation-current density, Q the elementary charge, V the voltage, K the Boltzmann's constant,T the temperature and JPH the photo-current density.
A crystalline silicon cell generates a photo-current density of JPH= 35 MA/cm2 at T=300k. The saturation-current density is J0=1.95*10^-10 MA/cm2
Assuming that the cell behaves as an ideal p-n junction, calculate the open-circuit voltage Voc (in V).
A rod (length = 80 cm) with a rectangular cross section (1.5 mm ? 2.0 mm) has a resistance of 0.20 ?. What is the resistivity of the material used to make the rod
A parallel-sided plate of glass having a refractive index of 1.58 is in contact with the surface of water in a tank. What angle does this ray make with the normal in the water
If the bullet has a mass of 21.5 and a speed of 310 , how high would the block rise into the air after the bullet becomes embedded in it.
X-rays with a wavelength of 7.02 x 10^-12 m strike a stationary electron and the reflected photon is scattered 75 degrees relative to the incident photon
if 470 J of heat are added to 65 moles of a monatomic gas at constant volume, how much does the temperature of the gas increase
A(n) 51.1 kg astronaut becomes separated from the shuttle, while on a space walk. She finds herself 72.4 m away from the shuttle and moving with zero speed relative to the shuttle.
The capacitor in an RC circuit has a capacitance of 29.6 µF. what should be the resistance
A gamma ray disappears in the process of creating an electron-positron pair. If the kinetic energies of the electron and positron are each 2.0 MeV, what was the energy of the gamma ray
The normal force equals the magnitude of the gravitational force as a roller coaster car crosses the top of a 49m diameter loop the loop
A thin spherical shell has a radius R=3 m. A constant force F=2 N is applied to the shell, always tangential to the surface of the sphere, producing an angular speed ?=2 rad/s about an axis through the center of the shell after a time t=4 s. What is ..
A fisherman casts his bait into the river at an angle of 25°. What was the initial velocity he launched the bait with
To get to a concert in time, a harpsichordist has to drive 123 miles in 2.03 hours. If he drove at an average speed of 55.0 mi/h in a due west direction for the first 1.22 h, what must be his average speed
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