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)

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 C

A 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

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A 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?