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A weakly guiding fibre with a particular graded core index has cut-off V-values for its 2nd, 3rd and 4th modes of 2.5, 3.9 and 5.2, respectively. The core radius is 4 microns, the core index is 1.47 and the cladding index is 1.46.
Determine the range of source wavelength values in nm for which the fibre is:
(a) single-mode
(b) two-mode,
(c) three-mode
(d) more than 3-mode.
A block initial located 3m up a frictionless inclined plane is given an initial velocity of 6m/s up the ramp. The plane is 10m long and titled by 30 degree. a) How long does it tak
Formers used for winding coils are ceramic or glass, because they are stable. Copper wire with silver plating is used up to 50 M Hz. Lit wire produces lower RF resistance than soli
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Draw a ray diagram to show the formation of image of an object placed among the optical centre and focus of the convex lens. Write the characteristics of image formed. Using this d
as flux = E.A and flux density is equal to flux/A then why A/A cannot e cancelled ?
uncontrollable reaction
Voltmeter: An electromechanical instrument which is used to calculate potential difference among two points is known as voltmeter. Voltmeter is a modified form of a galvanom
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A non uniform rod AB has a mass M and length 2L the mas per unit length of the rod is mx at a point of the rod distant x from A.find the moment of inertia of this rod about an axis
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