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ALL PHYSICS DOUBTS - POST HERE !!

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thenewkid™:

--- Quote ---0625/32/M/J/09  ques 7 b pleazz
i noe de fact dat evaporation is a coollin effect
bt dint gt de othr parts of ms!!!!!!
--- End quote ---
the cloth always remains damp because it is dipped in water on  both side
the energy required for the molecules to evaporate is obtained from the milk
hope this helps

Adzel:

--- Quote from: Dana on May 26, 2010, 07:32:55 pm ---Can someone please explain the whole concept of the LDR for me pleasee?? It's quite confusing.

--- End quote ---



The animation shows that when the torch is turned on, the resistance of the LDR falls, allowing current to pass through it.

Weaam:
Can anyone tell me what monochromatic light is??
Really Urgent!!

Ghost Of Highbury:

--- Quote from: weaam on May 26, 2010, 07:48:16 pm ---Can anyone tell me what monochromatic light is??
Really Urgent!!

--- End quote ---

Light of a single frequency.

NightHawkerr:
LDR :

As Light intensity decreases on LDR, The resistance across it increases, thus V input increases. When V input is more than 0.6 V, the transistor is switched ON, and thus the lamp/ alarm etc. turns ON.

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