Recent content by adrian116

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    Calculation about dioide with ideal diode model method

    Homework Statement This problem is to find the I and V by ideal diode model method (assume there is no voltage drop and resistance within the diode) Homework Equations Just simple Ohm's Law equation The Attempt at a Solution First i assume the diode 2 is open, but i don't know...
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    Constructive interference of monochromatic light

    then , no other equations can be used? What I need is to derive it myself by that drawing?
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    Constructive interference of monochromatic light

    sorry , not (b)1 and (b)2, it should be from relevant equations. As you said, am i necessary to derive other equations for this problem? And then following the method as when light is incident on slits to derive the equations for this problem?
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    Constructive interference of monochromatic light

    Homework Statement A source S of monochromatic light and a detector D are both located in air a distance h above a horizontal plane sheet of glass, and are separated by a horizontal distance x. Waves reaching D directly from S interfere with waves that reflect off the glass. The distance x is...
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    Alternating current about resonance width

    Since the question quite long and contains many formulas, so i take a photo instead. my question is that for part b since Z= \sqrt{R^2+(X_L-X_C)^2} can i subst X_L = (W_0+\triangle{\omega})L and X_C = \frac{1}{(w_0+\triangle{\omega})L} into the Z= \sqrt{R^2+(X_L-X_C)^2}...
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    Electromagnetic Induction and rectangular loop

    then , what should i do , can u give me some hints?
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    Electromagnetic Induction and rectangular loop

    the question is that: A rectangular loop with width L and a slide wire with mass m are as shown in Fig. A uniform magnetic field \vec B is directed perpendicular to the plane of the loop into the plane of the figure. The slide wire is given an initial speed of v_0 and then released. There is...
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    Finding Magnetic Field Solutions for a Current-Carrying Cylinder?

    I have got the ans. and the following problems are also be solved, thank you so much
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    Finding Magnetic Field Solutions for a Current-Carrying Cylinder?

    elemental area is the small cross section area dA=2 \pi r da, and the limits of integration is from 0 to a?
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    Finding Magnetic Field Solutions for a Current-Carrying Cylinder?

    i am sorry since i do not familiar that tutorial yet... Should i integrate \frac{2 I_0}{\pi a^2} [1- (\frac{dr}{a})^2] from 0 to a? if yes, how to integerate (dr)^2
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    Finding Magnetic Field Solutions for a Current-Carrying Cylinder?

    the question is that: A long, straight, solid cylinder, oriented with its axis in the z-direction, carries a current whose current density is \vec J. The current density, although symmetrical about the cylinder axis, is not constant but varies according to the relation (the relation is in...
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    How Does Charge Distribution Affect the Force on a Point Charge?

    i got it, i got the answer~ thx for helping~!
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    How Does Charge Distribution Affect the Force on a Point Charge?

    Is \vec{dF}= \frac{q dQ}{4\pi\epsilon_{0}r^2}\(\vec{i}+\vec{j}) to be integrated directly in terms of vector? or find the magnitude of \vec{i}+\vec{j} first?
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    How Does Charge Distribution Affect the Force on a Point Charge?

    how to make \hat r in terms of r, x and y and why I need to use vector form?
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