Define resistivity. State its unit.
Last Answer : Resistivity can be defined as the resistance of a conducting material per unit length with unit area of cross section. Its unit is ohm/meter
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Aug 4, 2019
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anonymous
Problems on resistance and resistivity
Last Answer : Problem on resistance and resistivity 1 : https://youtu.be/OqavD7OlZUs Problem on resistance and resistivity 2 : https://youtu.be/0eo8VO8cpwk Problem on resistance and resistivity 3 : https:// ... https://youtu.be/3neLRCTz0RQ Problem on resistance and resistivity 13 : https://youtu.be/vBCkvPOiztY
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May 21, 2019
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anonymous
Problem on resistance and resistivity 13
Last Answer : Problem on resistance and resistivity 13
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May 19, 2019
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anonymous
Problem on resistance and resistivity 12
Last Answer : Problem on resistance and resistivity 12
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May 19, 2019
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anonymous
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Problem on resistance and resistivity 11
Last Answer : Problem on resistance and resistivity 11
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May 19, 2019
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anonymous
Problem on resistance and resistivity 10
Last Answer : Problem on resistance and resistivity 10
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May 19, 2019
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anonymous
Problem on resistance and resistivity 9
Last Answer : Problem on resistance and resistivity 9
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May 19, 2019
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anonymous
Problem on resistance and resistivity 8
Last Answer : Problem on resistance and resistivity 8
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May 18, 2019
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anonymous
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Problem on resistance and resistivity 7
Last Answer : Problem on resistance and resistivity 7
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May 18, 2019
by
anonymous
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Problem on resistance and resistivity 6
Last Answer : Problem on resistance and resistivity 6
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May 18, 2019
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anonymous
Problem on resistance and resistivity 5
Last Answer : Problem on resistance and resistivity 5
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May 18, 2019
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anonymous
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Problem on resistance and resistivity 4
Last Answer : Problem on resistance and resistivity 4
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May 18, 2019
by
anonymous
Problem on resistance and resistivity 3
Last Answer : Problem on resistance and resistivity 3
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May 18, 2019
by
anonymous
Problem on resistance and resistivity 2
Last Answer : Problem on resistance and resistivity 2
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70 views
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May 18, 2019
by
anonymous
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Problem on resistance and resistivity 1
Last Answer : Problem on resistance and resistivity 1
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63 views
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May 16, 2019
by
anonymous
Which material has low resistivity?
Last Answer : Silver have lowest resistivity then copper then aluminium tungsten then iron...
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Jan 7, 2018
by
anonymous
What is the formula for resistivity?
Last Answer : Resitivity is the property of a material. It is given in ρ . R=ρ L/A is the formula. where , Resitance is directly proportional to Length & Inversely proportional to Area of ... the resistance offered by a conductor to the flow of current is called specific resistance or resistivity.
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Jan 7, 2018
by
anonymous
What is the reciprocal of resistivity?
Last Answer : conductivity, mho
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Jan 7, 2018
by
anonymous
resistivity of wire depend on?
Last Answer : Resitivity of wire depends on material, electrical resistance of that material, area of cross section and length.
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Aug 8, 2017
by
anonymous
what are the main factors that affect grinding and polishing process? automatic pressure grinding and polishing machine
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State the various factors governing selection of site for TPS.
Last Answer : Following various factors governing selection of site for TPS.:- 1. It should locate near coal mines. 2. Sufficient quantity of water should be available. 3. Sufficient large space should ... availalbe nearly. To the extent possible, the thermal station should be far away from an aerodrome
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Aug 2, 2019
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anonymous
State any four factors for selection of hydro power plant site.
Last Answer : Following Factors to be kept while site selecting for Hydro power plant: 1) Quantity of water available :-Where high rainfall occures so that sufficent quantity of water can be stored for generation of ... be possible to divert the stream. 11. Sand, gravel, etc., should be available nearby.
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Sep 7, 2018
by
anonymous
State any four factors for selection of site of wind power plant.
Last Answer : The Factors for selection of site for Wind Mills: 1) The site should be selected where winds are strong i.e. where pressure of wind is high and there is continuity (14.4- 16.2 km/h) ... 50m of the turbine which can affect the system's overall performance 10)Possibility to connect to power grid.
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Sep 7, 2018
by
anonymous
State any four factors for selecting location of nuclear power plant.
Last Answer : i) Seismicity: If the area of a nuclear site is seismically active, it may not be used for nuclear power plant. ii) Water Availability: The nuclear power plants would need a ... Therefore, the site selected for such plant should have adequate arrangement for the disposal of radioactive waste.
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Sep 7, 2018
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anonymous
State any four factors governing Selection of site for thermal power station.
Last Answer : Following Factors are to be considered:- 1. It should locate near coal mine. 2. Sufficient quantity of water should be available. 3. Sufficient large space should be available. 4. It should be located ... laws of the land and the town planning. 14. The interests of national defense must be served.
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Sep 7, 2018
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anonymous
Write any two factors on which earth resistance depends.
Last Answer : Factors on which earth resistance depends: (1) The shape and material used for the electrode (2) Depth of the electrode in the ground. (3) The specific resistance of the soil around the electrode (4) Moisture content in the soil. (5) Nature of soil
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Sep 6, 2018
by
anonymous
State the factors affecting hysteresis loss.
Last Answer : i) Flux density ii) Frequency iii) Volume of the magnetic material iv) Nature of magnetic material
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Sep 4, 2018
by
anonymous
List out factors affecting proximity effect.
Last Answer : Factors affecting proximity effect: 1. Conductor size (diameter of conductor) 2. Frequency of supply current. 3. Distance between conductors. 4. Permeability of conductor material
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May 6, 2020
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anonymous
State factors affecting the life of insulating materials.
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Apr 16, 2020
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anonymous
State and explain any four factors governing selection of induction motor.
Last Answer : The factors governing the selection of Induction motor: 1) Load torque required at normal speed matches with available torque of motor. 2) Break down torque or pull out torque or maximum torque ... If selecting energy efficient motor the cost benefit analysis over the long run must be worked out.
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Sep 22, 2018
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anonymous
State two factors deciding size of conduit.
Last Answer : Following factors deciding size of conduit: 1) Types of wiring method 2) No. of wires carried out through conduit 3) Size of wires required for sub circuits which is carried out through conduit 4) Future expansion.
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472 views
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Sep 22, 2018
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anonymous
The main disadvantages of having poor power factors are: (A) High cost of station and distribution equipment (B) Poor voltage regulation (C) High energy loss in conductor (D) All of the above
Last Answer : The main disadvantages of having poor power factors are: (A) High cost of station and distribution equipment (B) Poor voltage regulation (C) High energy loss in conductor (D) All of the above
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May 8, 2018
by
anonymous
What are the factors influencing measurement errors?
Last Answer : The factor influencing measurement errors are accuracy, precision, range and bandwidth, sensitivity, resolution and uncertainty.
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May 6, 2018
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anonymous
The Semiconductor strain gauges typically have much higher gauge factors than those of metallic strain gauges, primarily due to : (A) higher temperature sensitivity (B) higher Poisson’s ratio (C) higher piezoresitive coefficient (D) higher magnetostrictive coefficient
Last Answer : The Semiconductor strain gauges typically have much higher gauge factors than those of metallic strain gauges, primarily due to : higher piezoresitive coefficient
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Apr 26, 2018
by
anonymous
Define – resistance and resistivity. State relationship between them. Give one material having high resistivity.
Last Answer : Ans: Resistance and Resistivity: Resistance: It is the opposition offered by the conductor to the flow of current. Resistivity: It is property of the substance by virtue of which it opposes to ... high resistivity: Mica, Nichrom, Rubber, Glass, Plastic Porcelain, Dry wood, Insulating material etc.
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Sep 2, 2018
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anonymous
What is the correct sequence of the following materials in ascending order of their resistivity ? 1. Iron 2. Silver 3. Constantan 4. Mica 5. Aluminium Select the correct answer using the codes given below : (a) 2, 5, 1, 3 ... 5, 3, 1 and 2 (c) 2, 3, 1, 5 and 4 (d) 4, 5, 1, 3 and 2
Last Answer : What is the correct sequence of the following materials in ascending order of their resistivity ? 1. Iron 2. Silver 3. Constantan 4. Mica 5. Aluminium Select the correct answer using the codes given below : ... 1 and 2 (c) 2, 3, 1, 5 and 4 (d) 4, 5, 1, 3 and 2
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Apr 23, 2018
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anonymous
Materials, whose resistivity at very low temperatures plunges from a finite value to zero and remains there upon further cooling, are known as
Last Answer : Materials, whose resistivity at very low temperatures plunges from a finite value to zero and remains there upon further cooling, are known as Superconductors
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Apr 23, 2018
by
anonymous
The resistivity of a semiconductor material increases as : (A) The temperature increases (B) The temperature decreases (C) The temperature remains constant (D) None of the above
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Apr 14, 2018
by
anonymous
Which material is having highest resistivity in ohm-metre at 20oC X10-8? A. Mercury B. Iron C. Tungsten D. Silver
Last Answer : Mercury material is having highest resistivity in ohm-metre at 20oC X10-8
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Apr 12, 2018
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anonymous
The resistance of a strip of copper of rectangular cross-section is 2Ω. A metal of resistivity twice that of copper is coated on its upper surface to a thickness equal to that of copper strip. The resistance of composite strip will be
Last Answer : The resistance of a strip of copper of rectangular cross-section is 2Ω. A metal of resistivity twice that of copper is coated on its upper surface to a thickness equal to that of copper strip. The resistance of composite strip will be 4/3Ω.
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Apr 1, 2018
by
anonymous
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Resistivity is usually expressed in terms of
Last Answer : Ohms/cm-cube.
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Mar 31, 2018
by
anonymous
Resistivity of saline at various frequencies?
Last Answer : Because you are dealing with more than simple dc theory. Resistance (impedance to be more correct) of an rlc circuit changes with frequency. You will need to correct the impedance for the frequency You are using. ... It won't be perfect but it should give you an idea. That's a quick and dirty way.
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Feb 28
by
anonymous
What length of an alloy wire of resistivity 5.0x10^-7 Ωm and diameter 0.50mm is required to make a standard 6.0Ω resistor?
Last Answer : Interesting homework question. I’m not knowledgeable about physics, but putting myself in the shoes of someone who is.. Why don’t you post the answer that you got, and show your work, and ask us where you went wrong on the problem.
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Feb 27
by
anonymous
If the temperature of a semiconductor rises, what is its resistivity? -General Knowledge
Last Answer : The answer is 'Decrease'
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Feb 2
by
anonymous
If the temperature of a semiconductor rises, what is its resistivity? -General Knowledge
Last Answer : answer:
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Feb 2
by
anonymous
Resistance of a metal rod does not depend on which of the following ? 1) ... resistivity 2) density 3). Length 4), warmth ..... Explain it in a little details ?
Last Answer : Answer : On its density. Because it depends on how close or how far the atom must be seen.
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Jan 28
by
anonymous
The resistivity of indium arsenide arsenide is `rho=2.5 xx10^(-3) Omega m` and its Hall constant is `C_(H)=10^(-2) m^(3)//c`. Find the concentration a
Last Answer : The resistivity of indium arsenide arsenide is `rho=2.5 xx10^(-3) Omega m` and its Hall ... and mobility of the charge carriers in this material.
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Find the time of relaxation between collsion and free path of electrons in copper at room temperature. Given resistivity of copper`=1.7xx10^(-8) Omega
Last Answer : Find the time of relaxation between collsion and free path of electrons in copper at room temperature. Given ... electrons`=1.6xx10^(-4) ms^(-1)`
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Given that resistivity of copper is `1.68xx10^(-8) Omega`m. Calculate the amount of copper required to draw a wire 10 km long having resistance of `10
Last Answer : Given that resistivity of copper is `1.68xx10^(-8) Omega`m. Calculate the amount of copper required to draw a ... copper is `8.9xx10^(3) kg m^(-3)`.
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1 answer
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A rheostat has 100 turns of a wire of radius 0.4 mm having resistivity `4.2xx10^(-7) Omega`m. The diameter of each turn is 3 cm. What is the maximum v
Last Answer : A rheostat has 100 turns of a wire of radius 0.4 mm having resistivity `4.2xx10^(-7) ... the maximum value of resistance that it can introduce ?
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