The units of resistivity are:
a. ohm
b. ohm-meter
c. ohm/meter
d. ohm/meter2
e. (ohm/meter)−1
what is the resistivity in ohm/cm for 1M of copper sulphate solution?
A square shaped ( 4.7 mm by 4.7 mm) metal rod has resistance of 1.41 ohm. The resistivity of material is 0.5* 1.41 *10^-6 ohm-m. What is the length of the rod in meter?
A certain wire has a resistivity of 2 x 10-8 Ohm*m at 20 degrees C. If its length is 213 m and its cross-sectional area is 4 mm2, what will be its electric resistance at 68? (Assume that alpha = 0.005/deg C for this material)
11. An aluminum wire with a square cross-section 2 mm on a side is carrying a current of 1.5 amps. Aluminum has a resistivity of 2.69 x 10* ohm-cm and an atormic volume of 10 cc/mol. Assuming aluminum has three free electrons per atom, calculate the (a) Hall coeffcient, (b) electron mobility, (c) drift velocity, d) collision time. (e) electric field, (f) power dissipated (heat generated) per cm length, and (g) the Hall voltage across the wire in a transverse...
Semiconductor is doped with donor impurities and has the resistivity 0.03 Ohm*cm. The donor concentration ND = 7.5 E16 cm^-3. What is the electron mobility in the material? [unit:m*m/(V*s)]
Semiconductor is doped with donor impurities and has the resistivity 0.03 Ohm*cm. The donor concentration ND = 7.5 E16 cm^-3. What is the electron mobility in the material? [unit:m*m/(V*s)]
Consider the circuit shown below. Resistors A=10 Ohm, C=20 Ohm, and D=30 Ohm. The batteries B=6V, E=12V, and F=20V. Calculate currents in the circuit. E n
Answer units Question 11 (1 point) R3 In the following circuit, R1-40.2 Ohm, R2-2* 7.02 Ohm, R3-3° 7.02 Ohm, R4-27.02 Ohm, and E= 40.2 Volt. Calculate the current in R3 resistor? (Picture File-Ohm-3.jpg] Your Answer: Answer units Question 12 (1 point) Saved
You discover an metallic alloy having 212.6 x 1026 free electrons per cubic meter and resistivity of 51.73 nano Ohm-m. The internal dielectric constant inside the metal is 4.35 and there are 2.15 neutrons per proton in its nuclei. (a) Compute the mass density of the material (b) Compute the time between scattering events for the electrons, assuming the drude model of conduction (c) Compute the plasma frequency of the electrons. (d) A wire made of this metal is 5.29mm...
only choose mcq Four resistors, A: 25 ohm, B: 50 ohm, C: 10 ohm and D: 80 ohm are connected in series. A battery of 10 V is applied across the combination. If current is passed through the combination for one hour, heat generated is minimum for which resistor? A. C B. A C. D D. B