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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. Referring to Figure, let V BN = V RN = 120 V rms magnitude, and V BR = 240 V rms magnitude. Write down expressions for v BN (t), v RN (t), and v BR (t), and sketch them as a
Draw a relay construction diagram and briefly explain the operation of a relay. Define the terms normally open and normally closed. Define the terms Set and Reset for relays.
Classification of measures: measures or metrics can be classified under the following headings: 1 finance: income shareholder value added value rates of return costs. 2 outp
what is the reason of low meagger result of dc motor
Q. The flux in a magnetic core is alternating sinusoidally at a frequency of 500 Hz. The maximum flux density is 1 T. The eddy-current loss then amounts to 15W. Compute the eddy-cu
Determine the disadvantages of GPS system - Maps not up to date hence instructed to carry out an incorrect manoeuvre (for example turn into a road that no longer exists) -
Consider the 220-V, 1800-r/min dc motor, controlled by a three-phase fully controlled rectifier from a 60-Hz ac source. The armature-circuit resistance and inductance are 1.5 and
Note transducers convert a physical quantity from one form to another. The case below illustrates a typical moving coil meter that converts a current into a mechanical a
how to design load forecasting
1) Consider the magnetic circuit shown in the figure. Steady currents flow in the windings of N 1 and N 2 turns on the outside legs of the ferromagnetic core. The core has a
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