Which of the following metal conductors has least resistivity value?
A) copper
B) silver
C) tungsten
D) Nichrome
1 Answers
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A dietician wishes ot mix two type of item in such a way that the mixture contians at least 9 units of vitamin A and at least 15 units of vitamin C. I
Correct Answer - `x+3y ge 9`, ` 3x+5y ge 15` and `x ge 0,y gt 0`
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Degenerate orbitals have ,same l value and same n value , different l value and same n value
A) same l value and same n value
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Define good conductors and bad conductors.
Good conductors: The substances which conduct heat easily are called good conductors of heat. All metals are good conductor. eg: Steel, silver, Aluminium etc. Insulators: The substances which do nor conduct heal easily are called...
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What is thermal resistivity? What does it depend upon?
i. Thermal resistivity (ρT) is the reciprocal of thermal conductivity (k). ii. It is characteristic of a material.
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Name the scientist who proposed that metal conductors contain a large number of free electrons.
C) Both Drude & Lorentz
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A wire of length lm and radius 0.1 mm has a resistance of 100 Ω. The resistivity of the material is ………………….
B) 3.14 × 10-6 Ω – m
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Which one of the following material has high resistivity
Correct option is D) rubber
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Which among the following materials have their resistivity of the order of 1014 to 1016 Ω – m
C) insulators
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Which among the material has greater resistivity at room temperature ?
Correct option is B) Glass
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The resistivity of Nichrome is 10^-6 Ω-m. The wire of this material has radius of 0.1 mm with resistance 100 Ω, then the length will be
Correct option is: (A) 3.142 m
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