JA 4 cm long piece of Si with a cross-sectional area of 0.01 cm2 is doped with donors at 1016/cm?, and has a resistance of 8 ohms. Calculate the electron drift velocity (cm/s), if we apply a voltage of 80 V across the Si piece. (q = 1.6x10-1" C; ở = qnµ; R= pL/A; v= µƐ)
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- A solar cell, 3.0 cm square, has an output of 350 mA at0.80 V when exposed to full sunlight. A solar panel thatdelivers close to 1.3 A of current at an emf of 120 V to anexternal load is needed. How many cells will you need tocreate the panel? How big a panel will you need, and howshould you connect the cells to one another?Problem 3: A 1.2 g wire has a density of 2.7 g/cm3 and a resistivity of 2.7 × 10−8 Ωm. The wire has a resistance of 15 Ω. a) How long is the wire? b) The wire is made up of atoms with valence 1 and molar mass 26.98 g/mol. What is the drift speed of the electrons when there is a voltage drop of 30 V across the wire?A steady 4.46-mA current is present in a wire of diameter 1.0 mm. Calculate the drift velocity of the electrons, in nanometers per second, knowing that the concentration of free electrons is 1.87 x 1028 electrons per cubic meter. The charge of the electron is 1.60 x 10-19C.
- ostro Imssb1.mutah.edu.jo/mod/ A thermometer made of Platinum has a resistance of 50 2 at 20 C, what is the measured temperature (in units of C) when its resistance is 77 N. Assume the temperature coefficient of resistivity to be a= 3.92x 10 CA certain single ion channel is selectively permeable to K+ and has a resistance of 1.15 GΩ , therefore a current of potassium ions through the channel is possible. During an experiment, the channel is open for approximately 1.50 ms while the voltage across the channel is maintained at 89.5 mV. How many K+ ions, ?, travel through the channel during this time?51&page=1 What is the resistance (in units of Q) of a wire made of a material with a resistivity of 3.2 x 10-8 Q. m, if its length is 10.7 m and its diameter is 0.50 mm? Select one: O A. 6.02 OR. 0.67 OC.0.44 OD. 3.88 OE. 1.74 Next page 601 AM A O G d ENG 4/15/2021
- 8 and 9A heating element is made by maintaining a potential difference of 75.0 V across the length of a Nichrome wire has a 2.60 x 10-6 m² cross section. Nichrome has a resistiv of 5.00 x 10-7 m. If the element dissipates 5000 W, wha its length? Give your answer in cm.A piece of wire of length 104.2 cm and cross- sectional area 278.1 cm² is made from a material of resistivity 10.5 ohm-metre. What is the resistance of this wire?