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A bakelite capacitor is to be constructed to have a capacitance of 0.04µF and to have a steady workingpotential of 1kVmaximum. Allowing a safe value of field stress of 25MV/m find
(a) the thickness of bakelite needed,
(b) the area of plate needed if the relative permittivity of bakelite is 5,
(c) the maximum energy stored by the capacitor and
(d) the average power developed if this energy is dissipated in a time of 20µs.
the steel end-cap is fitted into grooves cut in the timber post.the working stresses for the post are 1.8 mpa in shear parallel to the grain and 5.5 mpa in bearing perpendicular to
When does the Total mechanical energy remain constant?
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Assume that two linked pistons are both cylindrical in shape. Show that the ratio of forces generated is directly proportional to the square of the radii of the two cross-sect
Q. Give three applications of photoelectric cells. (i) Photoelectric cells are utilized for reproducing sound in cinematography. (ii) They are utilized for controlling the
what is electic field
Explain Antenna. Write a short note or Antenna. Name two parts of antenna.
Length contraction
Until the time of Einstein, mass and energy were considered as two different physical quantities. But in 1905, with the help of postulates of the special theory of relativity Einst
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