Recent content by ajith.mk91

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    Undergrad Why is the minus sign omitted in the voltage across the inductor?

    According to faraday's law the governing equation is emf=-d(flux)/dt.But we usually write the voltage across the inductor as v=d(flux)/dt.What happened to the minus sign?
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    Undergrad Why does an aluminum disc rotate in an induction meter?

    In an induction meter two coils induce two eddy currents in same disc.It is said that the disc rotates due to the torque produced by the interaction of these currents with each other.How is that?I don't know the governing law.Can the torque be derived from the basic maxwell's equation?
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    Calculation of capacitance of transmission lines

    Well, thank you
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    Calculation of capacitance of transmission lines

    Capacitance between two plates is defined as the charge accumulated per unit potential difference between those plates. But in the case of transmission lines how can we define it? The potential difference any two conductors in a group of several conductors can be derived in terms of the charges...
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    Phase voltages from line voltages calculations

    How can we calculate phase voltages from the line voltages when the 3-phase system is unbalanced?
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    Calculating Semiconductor Resistance

    The resistance of the bar depends on the conductivity. And the conductivity depends on the doping concentration. So first find the conductivity. You need mobility of both electrons and holes for this. See if you can find this in text's appendix
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    Frequency Domain Analysis - the math

    Its simply a mathematical way of obtaining the coefficients. You can simply factorize the denominator into complex factors and proceed to obtain the inverse laplace transform.
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    What exactly is d c motor running on no-load?

    No the air gap flux does not decrease because it depends on stator terminal voltage. The stator just draws the appropriate current to counteract the rotor's effect.
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    How Does an Induction Generator Feed Energy Back to the Supply?

    Suppose that the stator of an induction motor is connected to grid and the rotor is run faster than the synchronous speed. Now the current direction in the rotor circuit reverses because air gap flux as seen by the rotor rotates in reverse direction at slip speed. To maintain the same flux in...
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    3-Phase Circuit - Line Current Calculation Question

    In this case both line current and phase current are the same. So add both line impedance and Y-load(single branch) and divide the phase voltage with the result to get line/phase current.
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    MATLAB MATLAB Thevenin: Find Solution to Impedance Problem

    Can you upload the circuit diagram
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    Induction motor fed from rotor.

    What will happen if an induction motor is fed from rotor side. I mean if i supply say 50HZ frequency supply to rotor through slip rings and have my stator windings connected to variable resistances will the rotor start to rotate and if it does in which direction?
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    In microprocessors for a word to transfer between different

    In microprocessors for a word to transfer between different registers(or between a register and a bus) an edge triggered pulse is required. Now in mp this can be done using control signal or a clock.In 8085 mp for what peripherals is that trigger provided by clock and what peripherals is that...
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    Do Humans Have Free Will in a Deterministic Universe?

    Hmmm... At last a discussion on the topic i pondered from my childhood. After all the years of contemplation on the issue i was led to a conclusion that the disposition of a particular person is dictated by determinism. Now the question is whether to yield to one's instincts or not. And i think...
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    Why Do Textbook Authors Only Provide Answers for Odd Numbered Questions?

    Why do several authors of standard text-books provide answers only for odd numbered questions? Any particular reason for this?