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

The metal whose electrical conductivity is more, is (1) copper (2) aluminium (3) silver (4) lead
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silver
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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 °fine metals has the maximum thermal conductivity? (1) Iron (2) Aluminium (3) Silver (4) Copper

Description : Which °fine metals has the maximum thermal conductivity? (1) Iron (2) Aluminium (3) Silver (4) Copper

Last Answer : (3) Silver Explanation: Silver has the best thermal conductivity of 429 W/mK at RT (295K). It is followed by copper, gold and aluminium. Metals generally have very good electrical conductivity, that leads to high thermal conductivity.

Which of the following is arranged in order of decreasing conductivity? (1) Copper, Aluminium, Steel, Silver (2) Aluminium, Silver, Copper, Steel (3) Copper, Silver, Aluminium, Steel (4) Silver, Copper, Aluminium, Steel

Description : Which of the following is arranged in order of decreasing conductivity? (1) Copper, Aluminium, Steel, Silver (2) Aluminium, Silver, Copper, Steel (3) Copper, Silver, Aluminium, Steel (4) Silver, Copper, Aluminium, Steel

Last Answer : (4) Silver, Copper, Aluminium, Steel Explanation: Copper ; 9% less conductive than silver; aluminium is 10% less conductive than copper; while steel is the least conductive among the given options. The most electrically conductive metal is silver.

Which of the metals has the maximum thermal conductivity? (1) Iron (2) Aluminium (3) Silver (4) Copper

Description : Which of the metals has the maximum thermal conductivity? (1) Iron (2) Aluminium (3) Silver (4) Copper

Last Answer : Silver

Which of the following is arranged in order of decreasing conductivity? (1) Copper, Aluminium, Steel, Silver (2) Aluminium, Silver, Copper, Steel (3) Copper, Silver, Aluminium, Steel (4) Silver, Copper, Aluminium, Steel

Description : Which of the following is arranged in order of decreasing conductivity? (1) Copper, Aluminium, Steel, Silver (2) Aluminium, Silver, Copper, Steel (3) Copper, Silver, Aluminium, Steel (4) Silver, Copper, Aluminium, Steel 

Last Answer : Silver, Copper, Aluminium, Steel

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

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

Last Answer : (A) Carbon

For aluminium, as compared to copper, all the following factors have higher values except (a) specific volume (6) electrical conductivity (c) co-efficient of linear expansion (d) resistance per unit length for same cross-section

Description : For aluminium, as compared to copper, all the following factors have higher values except (a) specific volume (6) electrical conductivity (c) co-efficient of linear expansion (d) resistance per unit length for same cross-section

Last Answer : (6) electrical conductivity

is universally used for windings of electrical machines because it is easily workable without any possibility of fracture. (a) Silver (b) Steel (c) Aluminium (d) Copper

Description : is universally used for windings of electrical machines because it is easily workable without any possibility of fracture. (a) Silver (b) Steel (c) Aluminium (d) Copper

Last Answer : (d) Copper

Pick out the wrong statement. (A) Lead can creep under its own weight at room temperature (B) The electrical conductivity of gold is considerably reduced by alloying additions due to the decrease in electron movement (C) Recrystallisation temperature decreases with decrease in strain in a cold worked metal (D) With increase in temperature, the electrical conductivity of intrinsic semi-conductor will increase

Description : Pick out the wrong statement. (A) Lead can creep under its own weight at room temperature (B) The electrical conductivity of gold is considerably reduced by alloying additions due to ... metal (D) With increase in temperature, the electrical conductivity of intrinsic semi-conductor will increase

Last Answer : (C) Recrystallisation temperature decreases with decrease in strain in a cold worked metal

A metal is exposed to the atmosphere for some time. It becomes coated with green carbonate. The metal must be – (1) silver (2) copper (3) aluminium (4) zinc

Description : A metal is exposed to the atmosphere for some time. It becomes coated with green carbonate. The metal must be – (1) silver (2) copper (3) aluminium (4) zinc

Last Answer : (2) copper Explanation: Copper forms a rich variety of compounds with oxidation states +1 and +2, which are often called cuprous and cupric, respectively. It does not react with water, but it ... contrast to the oxidation of iron by wet air, this oxide layer stops the further, bulk corrosion.

A metal is exposed to the atmosphere for sometime. It becomes coated with green carbonate. The metal must be (1) silver (2) copper (3) aluminium(4) zinc

Description : A metal is exposed to the atmosphere for sometime. It becomes coated with green carbonate. The metal must be (1) silver (2) copper (3) aluminium(4) zinc

Last Answer : copper

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

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

Last Answer : (3) Less thermal conductivity Explanation: A metal to be used as a cooking material should have less thermal conductivity.

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

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

Last Answer : Less thermal conductivity 

The best conductor of electricity among the following is : (1) Copper (2) Iron (3) Aluminium (4) Silver

Description : The best conductor of electricity among the following is : (1) Copper (2) Iron (3) Aluminium (4) Silver

Last Answer : (4) Silver Explanation: Copper: 9% less conductive than silver; aluminium is 10% less conductive than copper; while steel is the least conductive among the given options. The most electrically conductive metal is silver.

The material used in the fabrication of a transistor is – (1) Aluminium (2) Copper (3) Silicon (4) Silver

Description : The material used in the fabrication of a transistor is – (1) Aluminium (2) Copper (3) Silicon (4) Silver

Last Answer : (3) Silicon Explanation: A transistor is a semiconductor device used to amplify and switch electronic signals and electrical power. The first transistors were made from germanium (Ge). ... compound semiconductor material gallium arsenide (GaAs) and the semiconductor alloy silicon germanium (SiGe).

The best conductor of electricity among the following is : (1) Copper (2) Iron (3) Aluminium (4) Silver

Description : The best conductor of electricity among the following is : (1) Copper (2) Iron (3) Aluminium (4) Silver

Last Answer : Silver

The material used in the fabrication of a transistor is (1) Aluminium (2) Copper (3) Silicon (4) Silver

Description : The material used in the fabrication of a transistor is (1) Aluminium (2) Copper (3) Silicon (4) Silver

Last Answer : Silicon

The metal used for making air crafts and rockets is – (1) Lead (2) Aluminium (3) Nickel (4) Copper

Description : The metal used for making air crafts and rockets is – (1) Lead (2) Aluminium (3) Nickel (4) Copper

Last Answer : (3) Nickel Explanation: Nickel-based super alloys are an unusual class of metallic materials with an exceptional combination of high temperature strength, toughness, and resistance to degradation in ... These materials are widely used in aircraft and power-generation turbines, rocket engines, etc.

Babbitt metal used for bearings is a _________base alloy. (A) Tin (B) Lead (C) Aluminium (D) Copper

Description : Babbitt metal used for bearings is a _________base alloy. (A) Tin (B) Lead (C) Aluminium (D) Copper

Last Answer : (A) Tin

Babbitt metal (used for making bearings) comprises of (A) Mainly tin (85%) and lead (B) Saw dust and iron dust mixture (C) Zinc and aluminium (D) Copper and aluminium

Description : Babbitt metal (used for making bearings) comprises of (A) Mainly tin (85%) and lead (B) Saw dust and iron dust mixture (C) Zinc and aluminium (D) Copper and aluminium

Last Answer : (A) Mainly tin (85%) and lead

Which of the following metal sheets is most effective in preventing dampness? (A) Copper sheets (B) Lead sheets (C) Aluminium sheets (D) All the above

Description : Which of the following metal sheets is most effective in preventing dampness? (A) Copper sheets (B) Lead sheets (C) Aluminium sheets (D) All the above

Last Answer : Answer: Option D

The metal used for making aircrafts and rockets is (1) Lead (2) Aluminium (3) Nickel (4) Copper

Description : The metal used for making aircrafts and rockets is (1) Lead (2) Aluminium (3) Nickel (4) Copper

Last Answer : Nickel

Pick out the wrong statement. (A) Pure rubber is as useless as pure gold as a material of construction (B) Thermal conductivity of aluminium is higher than that of copper; henceit is increasingly used for utensil making(C) Copper has poor weldability(D) Reinforced plastics are made from both thermoplastic as well asthermosetting plastics

Description : Pick out the wrong statement. (A) Pure rubber is as useless as pure gold as a material of construction (B) Thermal conductivity of aluminium is higher than that of copper; henceit is ... has poor weldability (D) Reinforced plastics are made from both thermoplastic as well as thermosetting plastics

Last Answer : (B) Thermal conductivity of aluminium is higher than that of copper; henceit is increasingly used for utensil making

A fuse wire is made of: (1) an alloy of tin and copper (2) an alloy of tin and lead (3) an alloy of tin and aluminium (4) an alloy of nickel and chromium

Description : A fuse wire is made of: (1) an alloy of tin and copper (2) an alloy of tin and lead (3) an alloy of tin and aluminium (4) an alloy of nickel and chromium

Last Answer : (2) an alloy of tin and lead Explanation: Electric fuse wire is an alloy made of tin (63 % lead 37 %. The cross sectional area determines the melting point at a certain current. Alloys (e.g. ... resulting combination of good conductivity (due to the tin) with a low melting point due to the lead).

A fuse wire is made of: (1) an alloy of tin and copper (2) an alloy of tin and lead (3) an alloy of tin and aluminium (4) an alloy of nickel and chromium

Description : A fuse wire is made of: (1) an alloy of tin and copper (2) an alloy of tin and lead (3) an alloy of tin and aluminium (4) an alloy of nickel and chromium

Last Answer : an alloy of tin and lead

Silver is used for high precision electrical contacts in computer due to its property of ______. a) malleability b)conductivity c)ductility d)none

Description : Silver is used for high precision electrical contacts in computer due to its property of ______. a) malleability b)conductivity c)ductility d)none

Last Answer : b)conductivity

The conductivity of copper is less than that of silver by (A) 5 – 10 %. (B) 50 – 60 %. (C) 80 – 90 %. (D) 20 – 30 %.

Description : The conductivity of copper is less than that of silver by (A) 5 – 10 %. (B) 50 – 60 %. (C) 80 – 90 %. (D) 20 – 30 %.

Last Answer : (A) 5 – 10 %.

The metal used to make lightning conductors is (1) Iron (2) Aluminium (3) Copper (4) Zinc

Description : The metal used to make lightning conductors is (1) Iron (2) Aluminium (3) Copper (4) Zinc

Last Answer : Copper

Fuse wire is made of an alloy of – (1) Tin and Lead (2) Tin and Copper (3) Lead and Copper (4) Copper and Silver

Description : Fuse wire is made of an alloy of – (1) Tin and Lead (2) Tin and Copper (3) Lead and Copper (4) Copper and Silver

Last Answer : (1) Tin and Lead Explanation: The common material used as fuse wire is an alloy of tin and lead (63% tin and 37% lead). Fuse wires provide over current protection of an electrical circuit ... wire or strip that melts when too much current flows through it, thereby interrupting the flow of current.

Fuse wire is made of an alloy of (1) Tin and Lead (2) Tin and Copper (3) Lead and Copper (4) Copper and Silver

Description : Fuse wire is made of an alloy of (1) Tin and Lead (2) Tin and Copper (3) Lead and Copper (4) Copper and Silver

Last Answer : Tin and Lead

Presence of 0.3 to 0.5% arsenic in copper increases its (A) Ductility (B) Malleability (C) Tenacity & hardness (D) Electrical conductivity

Description : Presence of 0.3 to 0.5% arsenic in copper increases its (A) Ductility (B) Malleability (C) Tenacity & hardness (D) Electrical conductivity

Last Answer : (C) Tenacity & hardness

Copper has very low (A) Malleability (B) Ductility (C) Tensile strength (D) Thermal & electrical conductivity

Description : Copper has very low (A) Malleability (B) Ductility (C) Tensile strength (D) Thermal & electrical conductivity

Last Answer : (C) Tensile strength

Presence of even very minute amount (say 0.1%) of __________ in copper, reduces its electrical conductivity very seriously. (A) Bismuth (B) Arsenic (C) Antimony (D) Both (B) and (C)

Description : Presence of even very minute amount (say 0.1%) of __________ in copper, reduces its electrical conductivity very seriously. (A) Bismuth (B) Arsenic (C) Antimony (D) Both (B) and (C)

Last Answer : (D) Both (B) and (C)

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.

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

Description : 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

Last Answer : (A) More corrosion resistant

Which of the following is NOT malleable? (1) Graphite (2) Aluminium (3) Copper (4) Silver

Description : Which of the following is NOT malleable? (1) Graphite (2) Aluminium (3) Copper (4) Silver

Last Answer : (1) Graphite Explanation: Graphite is soft thanks to Van derWalls forces between to sheets of carbon atoms.

German silver used for making utensils is an alloy of – (1) Copper, silver, nickel (2) Copper, zinc, nickel (3) copper, zinc, aluminium (4) copper, nickel, aluminium

Description : German silver used for making utensils is an alloy of – (1) Copper, silver, nickel (2) Copper, zinc, nickel (3) copper, zinc, aluminium (4) copper, nickel, aluminium

Last Answer : (2) Copper, zinc, nickel Explanation: Nickel silver, also known as German silver, Argentan, new silver, nickel brass, albata, alpacca, or electrum, is a copper alloy with nickel and often ... to its development by 19th-century German metalworkers in imitation of the Chinese alloy known as paktong.

German silver is an alloy of - (1) copper, nickel and silver (2) silver, copper and aluminium (3) zinc, copper and nickel (4) silver, zinc and copper

Description : German silver is an alloy of - (1) copper, nickel and silver (2) silver, copper and aluminium (3) zinc, copper and nickel (4) silver, zinc and copper

Last Answer : (3) zinc, copper and nickel Explanation: German silver is a copper alloy with nickel and often zinc. The usual formulation is 60% copper, 20% nickel and 20% zinc.

German silver is an alloy of – (1) copper, nickel and silver (2) silver, copper and aluminium (3) zinc, copper and nickel (4) zinc, silver and copper

Description : German silver is an alloy of – (1) copper, nickel and silver (2) silver, copper and aluminium (3) zinc, copper and nickel (4) zinc, silver and copper

Last Answer : (3) zinc, copper and nickel Explanation: Nickel silver, also known as German silver, Argentan, new silver, nickel brass, albata, alpacca, or electrum, is a copper alloy with nickel and often ... . Nickel silver is named for its silvery appearance, but it contains no elemental silver unless plated.

German silver in an alloy of (A) Copper, nickel and zinc (B) Copper, aluminium and silver (C) Silver, zinc and aluminium (D) Silver, nickel and zinc

Description : German silver in an alloy of (A) Copper, nickel and zinc (B) Copper, aluminium and silver (C) Silver, zinc and aluminium (D) Silver, nickel and zinc

Last Answer : (A) Copper, nickel and zinc

Softness of silver can be converted into hardness by alloying it with small quantity of (A) Copper & nickel (B) Zinc (C) Aluminium (D) Tin

Description : Softness of silver can be converted into hardness by alloying it with small quantity of (A) Copper & nickel (B) Zinc (C) Aluminium (D) Tin

Last Answer : (A) Copper & nickel

Extraction of __________ employs an electrolytic process. (A) Aluminium (B) Silver (C) Copper (D) All (A), (B) and (C)

Description : Extraction of __________ employs an electrolytic process. (A) Aluminium (B) Silver (C) Copper (D) All (A), (B) and (C)

Last Answer : (A) Aluminium

Which of the following materials does not form adherent oxide film on surface? (A) Copper (B) Nickel (C) Aluminium (D) Gold & silver

Description : Which of the following materials does not form adherent oxide film on surface? (A) Copper (B) Nickel (C) Aluminium (D) Gold & silver

Last Answer : (D) Gold & silver

The most malleable, ductile low resistivity material is (A) Copper. (B) Aluminium. (C) Silver. (D) Iron.

Description : The most malleable, ductile low resistivity material is (A) Copper. (B) Aluminium. (C) Silver. (D) Iron.

Last Answer : (C) Silver.

Bronze is an alloy of (A) copper. (B) aluminium. (C) silver. (D) carbon.

Description : Bronze is an alloy of (A) copper. (B) aluminium. (C) silver. (D) carbon.

Last Answer : (A) copper.

German silver used for making utensils is an alloy of (1) copper, silver, nickel (2) copper, zinc, nickel (3) copper, zinc, aluminium (4) copper, nickel, aluminium

Description : German silver used for making utensils is an alloy of (1) copper, silver, nickel (2) copper, zinc, nickel (3) copper, zinc, aluminium (4) copper, nickel, aluminium

Last Answer : copper, zinc, nickel

German silver is an alloy of (1) copper, nickel and silver (2) silver, copper and aluminium (3) zinc, copper and nickel (4) zinc, silver and copper

Description : German silver is an alloy of (1) copper, nickel and silver (2) silver, copper and aluminium (3) zinc, copper and nickel (4) zinc, silver and copper

Last Answer : zinc, copper and nickel

In silvery paints, the main constituent present is - (1) Aluminium powder (2) Silver powder (3) Lead powder (4) White lead

Description : In silvery paints, the main constituent present is - (1) Aluminium powder (2) Silver powder (3) Lead powder (4) White lead

Last Answer : (1) Aluminium powder Explanation: In silvery paints, the main constituent is aluminium powder.

Which of the following metals does NOT react with oxygen even at a high temperature? (1) Aluminium (2) Silver (3) Lead (4) line

Description : Which of the following metals does NOT react with oxygen even at a high temperature? (1) Aluminium (2) Silver (3) Lead (4) line

Last Answer : (2) Silver Explanation: Silver and gold do not react with oxygen even at high temperatures as they are less reactive and are placed below the reactivity series.

In silvery paints, the main constituent present is (1) Aluminium powder (2) Silver powder (3) Lead powder (4) White lead

Description : In silvery paints, the main constituent present is (1) Aluminium powder (2) Silver powder (3) Lead powder (4) White lead

Last Answer : Aluminium powder