# What factors affect resistivity?

What factors affect resistivity?

1)type of material

2)temperature

3)length and area of cross section of conductor

## Related questions

Description :

what are the main factors that affect grinding and polishing process?

automatic pressure grinding and polishing machine

Description : What is the formula for resistivity?

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.

Description : What is the reciprocal of resistivity?

Description : Define resistivity. State its unit.

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

Description : Problems on resistance and resistivity

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

Description : Problem on resistance and resistivity 13

Answer : Problem on resistance and resistivity 13

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Answer : Problem on resistance and resistivity 12

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Answer : Problem on resistance and resistivity 11

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Answer : Problem on resistance and resistivity 10

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Answer : Problem on resistance and resistivity 9

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Answer : Problem on resistance and resistivity 8

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Answer : Problem on resistance and resistivity 7

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Answer : Problem on resistance and resistivity 6

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Answer : Problem on resistance and resistivity 2

Description : Problem on resistance and resistivity 1

Answer : Problem on resistance and resistivity 1

Description : Which material has low resistivity?

Answer : Silver have lowest resistivity then copper then aluminium tungsten then iron...

Description : resistivity of wire depend on?

Answer : Resitivity of wire depends on material, electrical resistance of that material, area of cross section and length.

Description : State the various factors governing selection of site for TPS.

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

Description : State any four factors for selection of hydro power plant site.

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.

Description : State any four factors for selection of site of wind power plant.

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.

Description : State any four factors for selecting location of nuclear power plant.

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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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.

Description : Write any two factors on which earth resistance depends.

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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Answer : i) Flux density ii) Frequency iii) Volume of the magnetic material iv) Nature of magnetic material

Description : What are the factors influencing measurement errors?

Answer : The factor influencing measurement errors are accuracy, precision, range and bandwidth, sensitivity, resolution and uncertainty.

Description : List out factors affecting proximity effect.

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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Description :

State and explain any four factors governing selection of induction motor.

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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State two factors deciding size of conduit.

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.

Description : 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

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

Description : 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

Answer : The Semiconductor strain gauges typically have much higher gauge factors than those of metallic strain gauges, primarily due to : higher piezoresitive coefficient

Description : The external environment factor that states: The values and culture that affect the way people feel about the organization they are in and about work itself is: (a) Sociological factors ; (b) Political factors ; (c) Economic factors ; (d) Psychological factors

Answer : (a) Sociological factors ;

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Answer : (c) Modern information systems enable people to evaluate a range of possible outcomes

Description : Yalom's curative factors within a group often affect the interactions of members and the group as a whole in complex ways. As members begin experiencing and expressing feelings, Yalom would assert that __________ is the curative factor. (a) Catharsis ; (b) Altruism ; (c) Interpersonal learning ; (d) Existential factor

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Answer :  (c) Domino effect ;

Description : State any four factors which affect shear strength of soil

Answer : Shear strength is affected by i) Soil composition Mineralogy, grain size, shape of soil particles, pore fluid type and content, clay content. ii) Initial State Loose, ... Drainage conditions Undrained, drained vii) Stress conditions deviator stress, confining stress, intermediate stress

Description : Enlist any four factors which affect selection of material handling system. Explain which type of material handling system is suitable for: (i) Unloading two wheelers from truck ii) Stacking of pallets in store racks.

Answer : Four Factors affecting Selection of Material Handling System: [1] Adaptability and Flexibility [2] Type of Material to be handled [3] Type of Layout [4] Type of Production [5] ... [11] Cost of installation and handling Suitable Material Handling Devices for Following Activities:

Description : Which of the following factors affect teaching ? Choose the correct code to indicate your answer. (i) Teacher’s internal locus of control. (ii) Learner-motivation. (iii) Teacher’s biographical data. (iv) Teacher’s self efficacy. (v) Learner’s interest in co-curricular activities. (vi) Teacher’s skill in managing and monitoring. (vii) Teacher’s knowledge of the subject including general knowledge. Codes : (A) (i), (ii), (iv), (vi) and (vii) (B) (i), (ii), (iii), (iv) and (v) (C) (iii), (iv), (v), (vi) and (vii) (D) (ii), (iii), (iv), (v) and (vi)

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Description : 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 and 4  (b) 4, 5, 3, 1 and 2  (c) 2, 3, 1, 5 and 4  (d) 4, 5, 1, 3 and 2

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Description : Why the Led Glow in Dc Supply ? Whenever give the Ac Supply What is Affect in Led ?

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Description : Define – resistance and resistivity. State relationship between them. Give one material having high resistivity.

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Description : Materials, whose resistivity at very low temperatures plunges from a finite value to zero and remains there upon further cooling, are known as

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

Description : 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

Description :

Which material is having highest resistivity in ohm-metre at 20oC X10-8? A. Mercury B. Iron C. Tungsten D. Silver

Answer : Mercury material is having highest resistivity in ohm-metre at 20oC X10-8

Description : 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

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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