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In an R-C circuit, a resistor, an uncharged capacitor, a dc battery, and an open switch are
in series. In an R-L circuit, a resistor, an inductor, a dc battery, and an open switch are in series. Compare the behavior of the current in these circuits (a) just after the switch is closed and (b) long after the switch has been closed. In other words, compare the way in which a capacitor and an inductor affect a circuit.
Two closely wound circular coils have the same number of turns, but one has twice the
radius of the other. How are the self-inductances of the two coils related? Explain your
reasoning.
In an electrolysis experimenta cathode of mass 5g found to weight 5.01g after a current of 5A flows for 50 second. What is electrochemical equivalent of the deposited substance ?
The core diameter of multimode step index fibre is 60 micrometer. The difference in refractive index is 0.013. The core refractive index is 1.46. Predict the number of guided modes when the operating wavelength is 0.75 micrometer
The resistance of a wire of length 100cm diameter 0.3mm is found to be 3.0 ohms Calculate (1) the resistivity (2) the conductivity of the material of a wire
A manufacturer wishes to fabricate a step index optical fibre from a material such that relative core cladding index difference is 0.01. The refractive index of cladding is 1.3. In other case, keeping the material of the core same, the cladding material is replaced by another medium, such that core-cladding index difference is now 0.02. Calculate the ratio of light gathering ability of the optical fibre for the two cases with refractive index of outer medium to be 1. Compare the two cables for their applications in communication. Suggest the measures to be done if graded index fibre is to be fabricated in both the cases and how it is going to change the properties and applications of cable.
A manufacturer wishes to fabricate a step index optical fibre from a material such that relative core cladding index difference is 0.01. The refractive index of cladding is 1.3. In other case, keeping the material of the core same, the cladding material is replaced by another medium, such that core-cladding index difference is now 0.02. Calculate the ratio of light gathering ability of the optical fibre for the two cases with refractive index of outer medium to be 1. Compare the two cables for their applications in communication. Suggest the measures to be done if graded index fibre is to be fabricated in both the cases and how it is going to change the properties and applications of cable.
Determine the ratio of stimulated and spontaneous emission rates. Predict the temperature at which these rates will be same for wavelength 1000 nm.
Numerical aperture of a fibre is 0.5 and core refractive index is 1.48. Find cladding refractive index and acceptance angle .
Determine the ratio of stimulated and spontaneous emission rates. Predict the temperature at which these rates will be same for wavelength 1000 nm.
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#339914 on Dec 2023