Materials having electrical conductivity much less than most of the metals but much greater than that of...

Materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators, are known as A. Thermistors B. Varistors C. Semi-conductors D. Variable resistors. 
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Materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators, are known as Semi-conductors.

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_______are the materials having electrical conductivity much less than most of the metals but much greater...

Description : _______are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators.

Last Answer : Semi-conductors are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators.

Pick out the wrong statement. (A) Copper is the metal having the highest electronic conductivity (B) Hardenability & Weldability of metals are inversely related (C) Covalent bonding formed by sharing of electrons is present in all semiconductor materials (D) Glass transition temperature applies to 'polymers' but not to 'glasses'

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Last Answer : Option A

What is the high electrical conductivity of metals is primarily due to?

Description : What is the high electrical conductivity of metals is primarily due to?

Last Answer : In metals electrons are in a free movement.

(3) reflection of light due to the presence of free electrons Explanation: Lustre (or luster) is the way light interacts with the surface of a crystal, rock, or mineral. The word traces its origins back to the latin lux, meaning "light", and generally implies radiance, gloss, or brilliance. Metals in general have high electrical conductivity, high thermal conductivity, and high density. Typically they are malleable and ductile, deforming -under stress without cleaving.

Description : (3) reflection of light due to the presence of free electrons Explanation: Lustre (or luster) is the way light interacts with the surface of a crystal, rock, or mineral. The word ... conductivity, and high density. Typically they are malleable and ductile, deforming -under stress without cleaving.

Last Answer : Cloud is a colloidal dispersion of – (1) Air in a dispersion medium of water (2) Fog in a dispersion medium of water (3) Mist in a dispersion medium of air (4) Water drops in a dispersion medium of air

The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K) (A) T (B) 1/T (C) T2 (D) 1/T2

Description : The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K) (A) T (B) 1/T (C) T2 (D) 1/T2

Last Answer : A) T

Which of the following materials has the poorest electrical conductivity? (A) Carbon (B) Aluminium (C) Silver (D) Stainless steel

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Description : Which of the following physical properties is TRUE of most dense ceramic materials? w) high tensile strength x) good ductility y) high compressive strength z) high electrical conductivity

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Describe the effects of temperature on conductivity of metals.

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A metallic alloy in general as compared to their pure metal components is (A) More corrosion resistant (B) Having higher melting point (C) Having lower hardness, reactivity and fusibility (D) Having lower electrical conductivity

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Description : Which of the following criterion is used for any metal to be used as a cooking material? (1) More specific heat (2) More thermal conductivity (3) Less thermal conductivity (4) Less electrical conductivity

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Which of the following criterion is used for any metal to be used as a cooking material ? (1) More specific heat (2) More thermal conductivity (3) Less thermal conductivity (4) Less electrical conductivity

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Which of the following has the lowest electrical conductivity?

Description : Which of the following has the lowest electrical conductivity? A) Mercury B) Silver C) Copper D) Gold

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The electrical conductivity of a semiconductor increases with increase in temperature because

Description : The electrical conductivity of a semiconductor increases with increase in temperature because (a) the carrier concentration increases (b) the mobility of carrier increases (c) both carrier concentration and mobility increase (d) the band gap decreases

Last Answer : The electrical conductivity of a semiconductor increases with increase in temperature because the carrier concentration increases

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Last Answer : (3) metals are good conductors of heat Explanation: On a chilly day, the room temperature is lower than our body temperature. Since metals have a higher coefficient of thermal conductivity than plastic, they ... from our fingers will flow to the metal cap much more quickly than to the plastic body.

On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because : (1) metals have higher thermal capacity than plastics (2) plastics have a lower density than metals (3) metals are good conductors of heat (4) plastics have a higher thermal conductivity than metals

Description : On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because : (1) metals ... metals (3) metals are good conductors of heat (4) plastics have a higher thermal conductivity than metals

Last Answer : metals are good conductors of heat

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Description : The property by virtue of which metals can be beaten into thin sheets is known as: A. Density B. Malleability C. Conductivity D. Ductility

Last Answer : ANSWER: B

Superconductors are those elements – (1) Whose conductivity is intermediate between metals and insulators (2) Whose resistance falls almost to zero at very low temperature (3) Which conduct electricity only at super-high temperature (4) Which conduct electricity only, at super-high temperatures

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Last Answer : Whose resistance falls almost to zero at very low temperatures

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Description : A composite flat wall of a furnace is made of two materials 'A' and 'B'. The thermal conductivity of 'A' is twice of that of material 'B', while the thickness of layer of 'A' is half that of B. If the temperature ... drop (in °K) across the layer of material 'A' is (A) 125 (B) 133 (C) 150 (D) 160

Last Answer : (D) 160

A wall has two layers of materials A and B; each made of a different material. Both the layers have the same thickness. The thermal conductivity of material A is twice that of B. Under the equilibrium, the temperature difference across the wall is 36°C. The temperature difference across the layer A is __________ °C. (A) 6 (B) 12 (C) 18 (D) 24

Description : A wall has two layers of materials A and B; each made of a different material. Both the layers have the same thickness. The thermal conductivity of material A is twice that of B. Under the equilibrium, the temperature ... difference across the layer A is __________ °C. (A) 6 (B) 12 (C) 18 (D) 24

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Three materials A, B and C of equal thickness and of thermal conductivity of 20, 40 & 60 kcal/hr. m. °C respectively are joined together. The temperature outside of A and C are 30°C and 100°C respectively. The interface between B and C will be at a temperature of __________ °C. (A) 40 (B) 95 (C) 70 (D) 50

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Last Answer : (C) 70

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Description : In a furnace, the heat taken by the charge/stock and the heat lost to the furnace structure & flue gases depends on the (A) Rate of firing and emissivity of flame (B) Thermal conductivity of the charge & ... (C) Nature of process; whether batch, continuous or intermittent (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Which of the following commonly used condenser tube materials has the lowest thermal conductivity? (A) Admiralty brass (B) Stainless steel (C) Aluminium brass (D) Titanium

Description : Which of the following commonly used condenser tube materials has the lowest thermal conductivity? (A) Admiralty brass (B) Stainless steel (C) Aluminium brass (D) Titanium

Last Answer : (B) Stainless steel

Which of the following building materials has the HIGHEST thermal conductivity? w) Southern pine wood x) common brick y) aluminum z) gypsum board or drywall

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Which element is with the highest electrical conductivity? -Do You Know?

Description : Which element is with the highest electrical conductivity? -Do You Know?

Last Answer : answer:

Depending on the electrical conductivity, matter can be divided into how many parts ?

Description : Depending on the electrical conductivity, matter can be divided into how many parts ?

Last Answer : Depending on the electrical conduction capacity, the material can be divided into 3 main categories- 1. Conductor 2. Misconducting 3. Non-conductive

Assertion:- Ionic compounds exhibits electrical conductivity in solution state. Reason :- In solution state electrons of ionic compounds are free.

Description : Assertion:- Ionic compounds exhibits electrical conductivity in solution state. Reason :- In solution state electrons of ionic compounds are free.

Last Answer : Assertion:- Ionic compounds exhibits electrical conductivity in solution state. Reason :- In solution state ... . If both Assertion & Reason are false

Sodium dissolves in liquid ammonia to form a solution which shows electrical conductivity.

Description : Sodium dissolves in liquid ammonia to form a solution which shows electrical conductivity.

Last Answer : Explain : Sodium dissolves in liquid ammonia to form a solution which shows electrical conductivity.

Are lead and pyrite comparable in electrical conductivity?

Description : Are lead and pyrite comparable in electrical conductivity?

Last Answer : Generally speaking, no, they are not. Lead is a pretty goodelectrical conductor, but pyrite (iron disulfide), which hasvariable electrical conductivity, might actually be tagged as asemiconductor.

What terms describe a substance that has a low melting point and poor electrical conductivity?

Description : What terms describe a substance that has a low melting point and poor electrical conductivity?

Last Answer : covalent and molecular

What is the electrical conductivity of glucose?

Description : What is the electrical conductivity of glucose?

Last Answer : Glucose is not conductive.

If electrical conductivity increases with the increase of temperature of a substance, then it is a: (1) Conductor (2) Semiconductor (3) Insulator (4) Carborator

Description : If electrical conductivity increases with the increase of temperature of a substance, then it is a: (1) Conductor (2) Semiconductor (3) Insulator (4) Carborator

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If electrical conductivity increases with the increase of temperature of a substance, then it is a (1) Conductor (2) Semiconductor (3) Insulator (4) Carborator

Description : If electrical conductivity increases with the increase of temperature of a substance, then it is a (1) Conductor (2) Semiconductor (3) Insulator (4) Carborator

Last Answer : (2) Semiconductor Explanation: A solid substance that has conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects.

The metal whose electrical conductivity is more, is – (1) copper (2) aluminium (3) silver (4) lead

Description : The metal whose electrical conductivity is more, is – (1) copper (2) aluminium (3) silver (4) lead

Last Answer : (3) silver Explanation: Copper ; 9% less conductive than silver: aluminium is 1 0% less conductive than copper; while steel is the least conductive among the given options. The most electrically conductive metal is silver.

Which of the following metal has maximum electrical conductivity?

Description : Which of the following metal has maximum electrical conductivity?

Last Answer : Silver

Which element is with the highest electrical conductivity?

Description : Which element is with the highest electrical conductivity?

Last Answer : Silver