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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°
Q. How numbering plan is achieved in modern telephony? Ans: The purpose of numbering plan is to uniquely identify every subscriber connected to a telecommunication network.
Q A60-Hz, 100-kVA, 2400/240-V(rms) transformer is used as a step-down transformer from a transmission line to a distribution system. Consider the transformer to be ideal. (a) Fi
Q. What do you mean by Exponent? The exponent field needs to represent both negative and positive exponents. To perform this, a bias is added to the actual exponent in order
What current must flow if 0.45 coulombs is to be transferred in 5 ms? Quantity of electricity, Q = It, then:
Q. What is Discrete signals? Discrete signals, on the other hand, exist only at specific instances of time, and as such, their functional description is valid only for discrete
Variable Frequency Systems In this systems the chopping period T will varying but either Ton is kept constant or T off kept constant. In any case the off time T off w
Why rhehostat is not used in the field of dc series motor
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Q. Motoring mode of rotating machines? The motoring mode has electric power input and mechanical power output. The electromagnetic torque Te drives the machine against the load
Q. A synchronous motor operates continuously on the following duty cycle: 50 hp for 8 min, 100 hp for 8 min, 150 hp for 10 min, 120 hp for 20 min, and no load for 14min. Specify th
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