Recent content by longcatislong

Oh god that's SO much simpler than what I was trying to do. Thanks a million!

Homework Statement Suppose the radius of curvature of a concave mirror is 5.0 cm a) Find the object distance that gives an upright image with a magnification of +1.51. Homework Equations 1/Do + 1/Di= 1/f m=-di/do=hi/ho The Attempt at a Solution First i convered all cm...

Homework Statement The figure below shows a ray of light entering one end of an optical fiber at an angle of incidence i = 51.0°. The index of refraction of the fiber is 2.05. Diagram link: http://www.webassign.net/walker/26-55.gif (a) Find the angle the ray makes with the normal when...

Homework Statement Even for an ideal transformer, we can't get "something for nothing". If this transformer steps up the voltage, what must be decreased? a) power b) current c) resistance The Attempt at a Solution Ep/Np=Es/Ns I believe it's power or current, but these two are related. So...

So, the coil needs to generate a current in response to a changing external magnetic field. The current generated by the coil will in turn create an induced magnetic field. What affects the strength of the current/magentic field is the resistance of the coil... yes...?

Homework Statement The magnetic field in the region shown below is increasing by 5 T/s. The circuit shown (with R=25 , C=95 µF, dimensions 1 m by 2 m) is inserted into the region as shown. The capacitor is initially uncharged. See Diagram...

The coil? It makes a current that makes a field to oppose the external field...?

Homework Statement A magnetic field is uniform throughout a region of space, but increases from 0 to 0.14 T in 2.4 s. A circular coil (of diameter 19 cm) is placed in a fixed orientation in this region such as to receive maximum flux. It takes 4171.91 turns to generate an emf of 6.9 V What...

Homework Statement A current-carrying circular loop of radius R is placed next to a long straight wire, as shown in the diagram below. The current in the straight wire points to the right and is of magnitude 3 A. see diagram...

Magnetic Force on Various Sides of Spinning Loop?? Homework Statement A horizontal uniform magnetic field of magnitude 0.4 T is oriented at an angle of = 65° relative to a line perpendicular to plane of a vertical, rectangular loop, as indicated in the figure. The loop has a height of 8 cm...

Homework Statement A fixed charge Q= +3.65 µC is held fixed at the origin of an xy plane. A second charge q= +5.11 µC is released from rest at the xy coordinate of (+1.15 m, +0.810 m). a) (a) If the mass of q is 2.90 g, what is its speed when it moves infinitely far from the origin...

Homework Statement A point charge q = +2.0 µC is placed at each corner of an equilateral triangle with sides 0.23 m in length. What is the magnitude of the electric field at the midpoint of any of the three sides of the triangle? 3. I want to know if I did this correctly, or totally...