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Ultraviolet catastrophe:
A shortcoming of the Rayleigh-Jeans formula, that tries to explain the radiancy of a blackbody at several frequencies of the electromagnetic spectrum. It was obviously wrong since as the frequency enhanced, the radiancy enhanced without bound; something quite not observed; it was dubbed the "ultraviolet catastrophe." It was later on reconciled and described by introduction of the Planck radiation law.
Hard ferrites are used for making (A) Transformer cores. (B) Electrical machinery. (C) High frequency equipment. (D) Light weight permanent m
What do you understand by rectifier? Illustrate working of half wave and full wave rectifiers with diagrams. Show the expression for its efficiency? Define a transistor and illu
what about capacitor with dielectric & air electric & electrolytic capacitor
A dual-wavelength spectrometer uses 780 nm and 830 nm. The molar extinction coefficients for oxy-hemoglobin (HbO 2 ) and deoxy-hemoglobin (Hb) at these two wavelengths are: e_HbO 2
Is it possible to see your whole body in a flat, planar mirror that is LESS THAN half your height if the mirror is at an angle? (i.e. not parallel to your body)
types of equilibriam
The primary coil of an ideal step-up transformer has 100 turns and the transformation ratio is also 100. The input voltage the power are 220 V and 1100 W respectively. Calculat
When the two simple harmonic motions have the same periodic time but different amplitude and a phase dissimilarity = ∏/2: The resultant curve may be attained graphically as abov
compare the contributions of faraday and oersted to electromagnetic theory
Moment of Inertia In this section we get formulae for determining the moment of inertia or second moment of a mass around an axis for several common physical shapes. The mome
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