Recent content by adrian116

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...

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

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?

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...

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}...

thx so much~

then , what should i do , can u give me some hints?

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...

I have got the ans. and the following problems are also be solved, thank you so much

elemental area is the small cross section area dA=2 \pi r da, and the limits of integration is from 0 to a?

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

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...

i got it, i got the answer~ thx for helping~!

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?

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