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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. Explain the working principle of an electronic voltmeter. Sol. Electronic voltmeter Basic Voltmeter: The addition of a series resistor, or multiplier, converts the
Question: a) For the circuit shown in figure (i) Determine the voltages across R1 and R2 and (ii) Determine the current which flows across R1 and R2. Both D1 and D2 a
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T h er e are three main types - The Shunt Connected DC motor in which the armature coils are connected in parallel with the field coils The Serie
A balanced three phase, four wire, WYE connect load consisting of per phase resistenance of A ohms and inductive reactance of D ohms/phase is connected to a B000 V three phase sour
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If a television station operates on UHF channel 20 (band 506-512 MHz), determine the station's visual-carrier frequency.
the forward resisitance of a semi conductor diode is 10 ohm, two such diodes used in full wave rectifier subjectto a sinusoidal voltage wave form. given by v(t)=308 , sin(100 pi t)
Q. Let v(t) = V max cos ωt be applied to (a) a pure resistor, (b) a pure capacitor (with zero initial capacitor voltage, and (c) a pure inductor (with zero initial inductor curren
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