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Write an expression for visibility (v) of interference pattern resulting from two coherent waves assuming (i) their fields to be parallel (ii) their fields to be equal and parallel? v= (I max -I min ) (I max +I min )
three charges are arranged in a line. The distance between Q1 and Q2 is 0.35 m and the distance between Q2 and Q3 is 0.45 m. What is the net electrostatic force acting on Q3
Charge is placed on a metallic sphere which is surrounded by air. If the radius of the sphere is 15 cm, how much charge can be placed on the sphere before the air near the sphere suffers electric breakdown? The critical electric field strength that leads to breakdown in air is 3 x 10^6 N/C
Assuming a velocity distribution which is a
parabola having its vertex 12 in from the boundary,
calculate the shear stress at y= 0, 3, 6, 9 and 12 inches.
Fluid’s absolute viscosity is 600 P
What do you understand by intensive and extensive variables of a system? state with reasons which of following variables are intensive and which are extensive ? (i) Number of gas molecules enclosed in a box (ii) density of a gas in a box (iii) wavelength of radiation emitted by a black body at temperature T(iv) intensity of radiation emitted by a black body at temperature T
Define viscosity discuss the effect of temperature and pressure on viscosity a
A metal of length 15.0lm is heated until temperature rise by 60c° If it's New length is 15.05m.calculate The linear expensivity
1.Consider the electric flux Φ E=E⋅A of a uniform electric field (whose magnitude is E
) that makes an angle θ with the unit vector n that is normal to a rectangular surface whose area is A. Then the electric flux ΦE can be shown to be equal to:
a. 0
b. EA
c. EA n
d. EA cos θ
2.The flux ϕE=28N⋅m^2/C through the open surface A=6i+10j+5k is given. Find the value of a if the electric field is E=−ai +8k Value of "a"
Gauss's law combines the electric field over a surface with the area of the surface. From Coulomb's law we know that the electric field falls off as 1/r^2 of the distance r from the charge. How does the surface area change with r?
a.1/r
b.1/r^2
c.r^2
d.ln r
Determine the magnitude of an electric field at r=0.01 m from the center of non-conducting sphere with a radius of R=0.001m possessing a charge of 7C which evenly distributed throughout the sphere. (r>R).
