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Calculate the N.A of a step index fibre having n1=1.48 and n2=1.46. What is the maximum entrance angle ψmax for this fibre if the outer medium is air with n1=1.0? Given n1=1.48 n2=1.46We know that numerical aperture, Sinψ = (n12- n22)½= (1.482- 1.462)½ =0.2425 ψmax= sin-1(0.2425) = 14.03°
Give the properties and application of permanent magnetic materials. Permanent magnetic materials: Properties: Permanent magnetic materials have a huge area of hyster
Q. How does one arrive at the probability of availability of free lines during busy hour? How can this be improved? Ans: One can arrive at probability of free lines during busy
i wanted the exact names of the components of the internal circuit of a 555 timer ic
1) only one pair of slip rings are required (to energise the rotating field coil) regardless of the number of phases produced by the alternator (three phases is common because of t
limitations of thevinin''s theorem
The stator and rotor of a three-phase, 440-V, 15-hp, 60-Hz, eight-pole, wound-rotor induction motor are both connected in wye and have the following parameters per phase: R1 = 0.5
register array?
Q. What do you understand by Analog to Digital conversion? What do you understand by A/D conversion? Give an explanation of any one of the following A/D techniques: (i) Su
'Electrical drives' is a general term that is commonly used to describe both DC and AC excited motors that provide continuous rotary motion, whilst 'electrical actuators' provide l
Summation Meters Summation meters are other special categories of meters that are used for recording the total consumption of a consumer fed at more than one point. The major
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