Recent content by Sir_Pogo

Question: It is determined that 100cycles of frequency 433MHz are required to recognize a symbol with a certain wireless receiver. Two symbols form a bit, fi + fm and fi - fm. What is the baud rate? I was thinking that since T=1/f then you would have: 100cycles=1/433MHz => 100*433 =...

Polarizers 1 and 3 have their axes of polarization, indicated by the black solid lines, perpendicular to each other. If you try to shine light through only the combination of 1 and 3, you will find that none passes through. However, now we put in another polarizer (number 2 in the figure)...

which equation is the one that deals with flux and velocity, i was trying to use these ones to solve: F=ma=ILB I=BLV/R

the velocity induces an emf, the emf gives a current, and the current gives a backward force F=ILB How do i set it up to solve for the final velocity?I can't figure out how to do part two either because setting v to zero, you cannot solve for t because ln (0) is undefined.

the velocity induces an emf, the emf gives a current, and the current gives a backward force F=ILB, so you can set up and equation mdv/dt=F=-Cv, for some const C you will get. am i right? I am still not getting the right answer

Are there any hints on this one...I am using Faraday's Law where EMF = N*(change in flux over change in time). The magnetic flux is equal to BA, which is the B for the center of a loop (with radius of the outer circle) times A for the inner circle...my final equation is coming out something like...

im using dBda/dt and da/ta= .5*r*ds/dt where ds/ts is the velocity im taking that time the magnetic field. also i am watchin my units. so B*.5*r*v=emf? what's wrong its not right tho?

Can i get some help on this problem? A conducting bar of length L = 25.6 cm and mass M = 35.0 g lies across a pair of conducting rails. The contact friction between the bar and the rails is negligible, but there is a resistor at one end with a value R = 45.0 Ohms. Initially the rod is given an...

Can i get some help with this problem? This problem deals with the basic loop configuration you will use in the laboratory to construct a metal detector. Two concentric circular coils of wire lie in a plane. The larger coil has 49 turns and a radius of a = 7.90 cm. The smaller coil also has 49...

Can i get some help with this homework problem?? A physicist wraps a long copper wire around a toilet paper roll and places the roll in a uniform magnetic field. The axis of the roll is aligned with the field. The radius of the roll is r = 6 cm and the strength of the field is B = 0.1 T. If the...

I have a homework problem where there is a long copper wire around a toilet paper roll that is placed in a uniform magnetic field. The axis of the roll is aligned with the field. I am given the radius of the roll, strength of the field, and a velocity at which the wire is unrolled. How do i...