Superposition Theorem Requirement: Power System is a complex network having number of voltage and current sources and number of loads. Now to analyze the network we need to find voltage/current at particular branch or load. In such cases calculations for thevenin's and norton's theorem becomes difficult. We can use superposition theorem to find voltage/current at any branch or load in complex network. In this theorem only one source considered at a time and total voltage/current is sum of voltage/current obtained by considering individual source. Statement of Superposition Theorem:
Question : When a reverse bias is applied to a germanium PN junction diode, the reverse saturation current at room temperature is 0.3m A. Determine the current flowing in the diode when 0.15v forward bias is applied at room temperature. Solution : Given Io = 0.3 * 10-6A and VF = 0.15v The current flowing through the PN diode under forward bias is I = Io (e^(40VF) -1) for germanium diode = 0.3 * 10^(-6) (e^(40*0.15) -1) = 120.73mA. For any further queries please comment below.
Important questions of JB Gupta book Model Test Paper 2 : (We are working to provide detailed solutions of each question. We are updating this page.) Question 1 : In a magentic material, hysteresis loss takes place primarily due to (a) rapid reversals of its magnetisation (b) flux density lagging behind magnetis ing force (c) molecular friction (d) its high retentivity Show Answer Ans: D Question 2 : On which of the following factors does the resolution of a potentiometer depend? (a) Size of wire (b) Type of contact (c) Composition of wire material (d) Shape of wire cross-section Show Answer Ans: A Question 3 : The braking retardation is usually in the range (a) 0.15 to 0.30 km phps (b) 0.30 to 0.6 km phphs (c) 0.6 to 2.4 km phps (d) 3 to 5 km phps (e) 10 to 15 km phphs Show Answer Ans: D Question 4 : Which of the following methods is used for reduction/elimination of harmonic torques? (a...
If you have any doubt then do comment in a below section .
ReplyDelete