Qualification > Sciences
ALL PHYSICS DOUBTS - POST HERE !!
Vin:
black line is the Optical Axis .. green is parallel to it which converges .. am i right Master ??
jellybeans:
--- Quote from: weaam on May 25, 2010, 05:53:29 pm ---For Q34, doesnt the resistance increase with thicker wire?
And thanks! ;)
--- End quote ---
haha, nopes :D resistance - increase in increasing length of wire & temperature, &decreasing in diameter.
Shazizzzle:
Umm, should the p.d for creating cathode rays in a vacuum be a.c or d.c, and why?
There was this question, Q36 in O/N 2009, P 12 (VARIANT 2).
jellybeans:
--- Quote from: MasterMath on May 25, 2010, 05:51:11 pm ---And dont laugh at my drawing ... its freehand didnt have time to make it perfect .. tell me if you dont understand it ..
It explains where the Optical Focus is
--- End quote ---
hahahaha- like your handwriting. THANKS ;D
Vin:
--- Quote from: weaam on May 25, 2010, 05:53:29 pm ---For Q34, doesnt the resistance increase with thicker wire?
And thanks! ;)
--- End quote ---
29) C .. always for ohmic conductors the graph is the way shown in the diag. Ohmic conductors are conductors that follow the ohms law .. ohms law states R=V/I .. V is directly proportional to I
When the diameter of the wire or the cross sectional area is greater the resistance decreases .. how ?? as the area is increased there is more 'space' for the electrons to move through the wire so not much resistance for them to block their path ..vise versa as the diameter deceases
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