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Using the concept of free electrons in a conductor, derive the expression for the conductivity of a wire in terms of number density and relaxation time. Hence obtain the relation between current density and the applied electric field E. (Physics CBSE 2018)0 Answer The electric power consumed by a device may be calculated by using either of the two expressions -CBSE physics class 101 AnswerT here is a change in the values of the bulk modulus and density across the Gutenberg discontinuity (from mantle to outer core). Which one of the following statements is CORRECT?0 AnswerThe trigonometric Fourier series of an even function does not have the -gate-ece-20111 AnswerIf the sum of first 7 terms of an A.P. is 49 and t hat of its first 17 terms is 289, find the sum of first n terms of the A.P. CBSE Mathematics1 AnswerAn analysis of augite yields 3 silicon atoms calculated on the basis of 12 oxygen atoms. If only Al replaces Si, calculate the number of tetrahedral-Al in the mineral. GATE-Geology and Geophysics-Question-20121 AnswerIf the ratio of the sum of the first n terms of two A.Ps is (7n + 1) : (4n + 27), then find the ratio of their 9th terms. Mathematics CBSE class 10 20171 AnswerThe Poisson’s relation linking the gravity and magnetic potentials assumes the same anomaly source with: (-Gate geology and geophysics 2014)1 AnswerFour aqueous-vapor fluid inclusions P, Q, R and S are petrographically identical at room temperature, and contain approximately 90 % liquid and 10 % vapor. The freezing temperatures of the fluid inclusions are: P = − 5.3 °C, Q = − 16.6 °C, R = 1 AnswerThe mass per unit volume of a substance is called density (density = mass/volume). Arrange the following in order of increasing density - air, exhaust from chimney, honey, water, chalk, cotton, and iron. CBSE- Class9- Chemistry 20131 AnswerIn an A.P., fhe sum of first ten terms is –150 and the sum of its next ten terms is –550. Find the A.P. CBSE Mathematics1 AnswerIn an A.P., the sum of its first ten terms is – 80. and the sum of its next ten terms is – 280. Find the A.P. CBSE Mathematics1 AnswerIn an A.P., the sum of its first ten terms is – 80. and the sum of its next ten terms is – 280. Find the A.P. CBSE Mathematics1 AnswerExplain the terms horn clauses and satisfiability in terms of logic in computer science.1 AnswerThe Bouguer anomaly obtained after applying all necessary corrections is due to -gate Geology & Geophysics 20173 AnswerAssuming ISA standard sea level conditions (288.16 K, density of 1.225 kg/m^3, g = 9.81 m/s^2, R = 287 J/(kg-K)), the density (in kg/m^3) of air at Leh, which is at an altitude of 3500 m above mean sea level is ________ (accurate to two decimal places). (GATE-Aerospace-Engineering-2018)0 AnswerFor what value of k will k + 9, 2k – 1 and 2k + 7 are the consecutive terms of an A.P? Mathematics CBSE class 10 20161 AnswerHow many terms of an A.P. 9, 17, 25, .... must be taken to give a sum of 636? Mathematics CBSE class 10 20171 AnswerFor what value of n, are the nth terms of two A.Ps 63, 65, 67,.... and 3, 10,17,..... equal? Mathematics CBSE class 10 20171 AnswerThe shadowgraph flow visualization technique depends on GATE-Aerospace Engineering-Question-20121 Answer
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