Recent questions tagged circuits

asked Jan 7 by anonymous

Find the Norton equivalent resistance for the network shown in Fig No. 2

Last answer: Solution: To find Norton’s equivalent resistance removing voltage source and current source. Voltage source is replaced by short circuit and current source is replaced by open circuit so, we get circuit as

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asked Jan 7 by anonymous

Use mesh analysis to calculate ammeter current in Fig No. 1

Last answer: Solution:

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asked Jan 7 by anonymous

An a.c series circuit has resistance of 10ohm, inductance of 0.1H and capacitance of 10µf, voltage applied to circuit is 200V. find (i) Resonant frequency (ii) Current at resonance (iii) Power at resonance

Last answer: Solution: For RLC series circuit

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asked Jan 7 by anonymous

Two unpedauces given by Z1 = 10 + j5 and Z2 = 8 + j9 are joined in parallel and connected across a voltage of V = 200 + j0. Calculate the circuit current and branch currents. Draw the vector diagram.

Last answer: Solution: Given, Z1=10+j5, Z2=8+j9, V=200+j0

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asked Jan 7 by anonymous

A series combination of resistance 100 ohm and capacitance 50µf is connected in series to a 230 V, 50HZ supply. Calculate (i) Capacitive reactance (ii) Current (iii) Power factor (iv) Power consumed

Last answer: For RC series circuit

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asked Jan 7 by anonymous

State super position theorem. Write steps to find current in an element using super position theorem.

Last answer: Statement of superposition theorem: In any linear network containing two or more sources, the current in any element is equal to algebraic sum of the current caused by individual source acting ... . Add algebraically the voltage drops and branch currents to obtain combined effect of all sources.

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asked Jan 7 by anonymous

Derive an expression for delta to star transformation.

Last answer: For delta network the resistance between the terminals 1 and 2 consists of R12 in parallel with (R23+R31) Hence ,the resistance between the terminals 1 and 2 is In case of star network the ... equation( ii) from( i),we get Adding equations (iii) and( iv),we have

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asked Jan 7 by anonymous

Derive an expression for resonant frequency of series RLC circuit.

Last answer: At resonance frequency in RLC series circuit, we have inductive reactance is equal to capacitive reactance i.e. Where fr is the resonant frequency in RLC series circuit.

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asked Jan 7 by anonymous

Explain the concept of initial and final conditions in switching circuits for elements R and L.

Last answer: Concept of Initial and final condition in switching circuits for R: Consider a resistor is connected to a voltage source, using a switch as shown in fig below The switch is closed ... of value Io in parallel with short circuit.(I0 is the current in inductor just before switching)

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asked Jan 7 by anonymous

Explain the suitable example to convert a practical current source into equivalent voltage source.

Last answer: The open- circuit voltage across terminals A and B is Voc = drop across R =5x2=10V Hence, voltage source has a voltage of 10V and the same resistance of 2Ω

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asked Jan 7 by anonymous

Compare series and parallel resonance on the basis of (i) Resonating frequency (ii) Impedance (iii) Current (iv) Magnification

Last answer: S. No . Parameter Series Circuit Parallel Circuit 1 Resonating frequency 2 Impedance Minimum, Z = R Maximum, Z = L/CR 3 Current Maximum, I ... , I = V/(L/CR) 4 Magnification Voltage magnification takes place Current magnification takes place

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asked Jan 7 by anonymous

For R-C series circuit draw (i) Circuit diagram (ii) Vector diagram (iii) Waveform of voltage and current

Last answer: i) Circuit diagram ii)Vector diagram iii)Waveform of voltage and current

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asked Jan 7 by anonymous

Write equation of short circuit Y parameters.

Last answer: The equation of short circuit Y parameters.

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asked Jan 7 by anonymous

State maximum power transfer theorem.

Last answer: Maximum Power Transfer Theorem states that “Maximum power is transferred from the source to the load when the load resistance is equal to the Thevenin’s equivalent resistance of the given circuit as seen from load terminals” i. e, RL = RTH

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asked Jan 7 by anonymous

Draw – (i) Practical voltage source (ii) Ideal current source

Last answer: i) Practical voltage source ii) Ideal current source Where, Is = Current Source Rs = internal resistance of source

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asked Jan 7 by anonymous

State condition for resonance in R-L-C series circuit.

Last answer: The condition for resonance in R-L-C series circuit. i) Inductive Reactance should be equal to capacitive reactance. That is XL = XC ii) The power factor of the circuit is Cos ɸ = 1 iii)The voltage and ... and given by I =V/R. v)Impedance of the circuit is minimum and given by Z =R.

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asked Jan 7 by anonymous

Write equation of resultant impedance in R-L circuit.

Last answer: The equation of resultant impedance in R-L circuit

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asked Jan 7 by anonymous

Define: (i) Apparent power (ii) Real power

Last answer: (i) Apparent power It is the product of rms values of applied voltage and circuit current. Unit: volt-ampere (VA) OR kilo-volt-ampere (kVA) OR Mega-volt-ampere (MVA) S = VI = I2 Z volt ... circuit. (OR) It is the power which is actually dissipated in the circuit resistance.

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asked May 5, 2020 by anonymous

Why is it necessary to keep air gaps in magnetic circuits as small as possible?

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asked Apr 27, 2020 by anonymous

Explain with neat diagram series and parallel magnetic circuits.

Last answer: Series magnetic circuit: When different magnetic materials having different lengths, cross sectional areas and permeability are connected one after another, in which same flux is established in different sections, then it is called series ... flux, Φ = Φ1 + Φ2 Path 1: BAFE Path 2: BACD

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asked Apr 26, 2020 by anonymous

Series Magnetic Circuits

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asked Feb 5, 2020 by anonymous

How to solve circuits with a complex numbers

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asked Jul 21, 2019 by anonymous

Compare Asynchronous sequential and synchronous sequential circuits.

Last answer: SR. NO. ASYNCHRONOUS SEQUENTIAL CIRCUIT SYNCHRONOUS SEQUENTIAL CIRCUITS. 1 Output can be changed at any instant of time by changing the input Output changes at discrete ... the counter change state simultaneously. This is because all the flip-flops are clocked simultaneously.

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asked Jun 11, 2019 by anonymous

Series rc circuits

Last answer: Series rc circuits

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asked May 26, 2019 by anonymous

Circuits with XL Alone

Last answer: Circuits with XL Alone X L values in series let two inductive reactances X L 1 and X L 2 are connected in series and has value 50 ohm and 50 ohm respectively. 100 volts A C ... phasor. And it is taken horizontal. Phase angle between inductive current and voltage is same 90 degree.

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asked May 26, 2019 by anonymous

AC Circuits with Resistance but No Reactance

Last answer: AC Circuits with Resistance but No Reactance AC Circuits with Resistance but No Reactance Series resistances let two resistances R 1 and R 2 are connected in series as shows in figure and there ... voltage. Voltage V A is common to both the branch hence voltage V A is common reference.

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asked May 21, 2019 by anonymous

Nodal Analysis of Electric Circuits Example

Last answer: Nodal Analysis of Electric Circuits Example 1 : https://youtu.be/XLS6kDQuHj0 Nodal Analysis of Electric Circuits Example 2 : https://youtu.be/OFhurvl74bA Nodal Analysis of Electric Circuits ... youtu.be/GmOozdjTVtM Nodal Analysis of Electric Circuits Example 9 : https://youtu.be/KjgfjJ7Ubb8

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asked Sep 7, 2018 by anonymous

What is the need of polarity marking in polyphase AC circuits?

Last answer: Need of Polarity Marking in Polyphase AC Circuits: i) Polarity marking of terminals provides reference polarity for better understanding of system, even if the polarity of ac voltage changes ... of current transformers in relay protection circuit and getting desired performance is very difficult.

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asked Sep 6, 2018 by anonymous

State superposition theorem applied to D.C. circuits.

Last answer: Superposition Theorem applied to D.C. circuits: Superposition theorem states that in any linear, bilateral, multisource network, the response (voltage across any element or current through any ... each source acting alone, while the other sources are replaced by their internal resistances.

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asked Sep 5, 2018 by anonymous

State two advantages of digital circuits.

Last answer: Advantages of Digital Circuits: i) Digital circuits are easier to design. ii) Information storage is easy. iii) Accuracy and precision are greater. iv) Less affected by noise. v) Reliability is more

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asked Jun 18, 2018 by anonymous

Which of the following circuits converts any arbitrary waveform into square waveform?

Which of the following circuits converts any arbitrary waveform into square waveform? A) Hartley oscillator B) Schmitt trigger C) Differentiator D) RC phase shift oscillator

Last answer: Which of the following circuits converts any arbitrary waveform into square waveform? A) Hartley oscillator B) Schmitt trigger C) Differentiator D) RC phase shift oscillator

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asked Apr 29, 2018 by anonymous

Which of the following is true at resonance in LC circuits?

Which of the following is true at resonance in LC circuits? A) The series impedance of the two elements is at a maximum and the parallel impedance is at minimum B) The series impedance of the two elements is at a maximum and the parallel impedance is also at maximum C) The series impedance of the two elements is at a minimum and the parallel impedance is also at minimum D) The series impedance of the two elements is at a minimum and the parallel impedance is at maximum

Last answer: Which of the following is true at resonance in LC circuits? A) The series impedance of the two elements is at a maximum and the parallel impedance is at minimum B) The series impedance of ... D) The series impedance of the two elements is at a minimum and the parallel impedance is at maximum

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asked Apr 26, 2018 by anonymous

Asynchronous circuits are usually faster than synchronous circuits because

Last answer: Asynchronous circuits are usually faster than synchronous circuits because they are free running and do not depend on the frequency of the clock

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asked Mar 25, 2018 by anonymous

An air gap is usually inserted in magnetic circuits to?

Last answer: An air gap is usually inserted in magnetic circuits to prevent saturation.

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asked Mar 25, 2018 by anonymous

In AC. circuits, laminated iron is invariably used in order to?

Last answer: In AC. circuits, laminated iron is invariably used in order to reduce eddy current loss.

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asked Mar 11, 2018 by anonymous

What is the need for electrically isolated drive circuits?

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asked Mar 11, 2018 by anonymous

Explain transformer isolated drive circuits providing both signal and power.

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asked Mar 10, 2018 by anonymous

Explain different gate drives techniques with base circuits and key features.

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asked Mar 8, 2018 by anonymous

Which capacitors are suitable for DC filter circuits?

Last answer: Electrolytic capacitors are suitable for DC filter circuits.

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