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Some phenomenon based on scattering:
(i) Sky looks blue because of scattering.
(ii) At the starting time of sunrise or sunset sun looks reddish.
(iii) Danger signals are of red color.
The conductivity of an extrinsic semiconductor (A) Decreases with temperature. (B) Increases with temperature. (C) Remains constant with temperature. (D) Decrea
A mass m rotating freely in a horizontal circle of radius 1 m on a frictionless smooth table supports a stationary mass 2m, attached to the other end of the string passing through
Uses of Radio Isotopes: Industries: 1. Radio active isotopes are used to detect leakage in pipes. 2. It estimates weak and tear machine tools. 3. It is used to check t
A copper pot with mass 0.500 kg contains 0.170 kg of water ata temperature of 20.0ºC. A 0.250-kg block of iron at85.0ºC is dropped into the pot. Find the final temperature, assumin
Calculate the heat required to melt 316.7kg of potassium metal at 336 K. The enthalpy of fusion of potassium is 2.35 kJ mol -1 .
a n-p-n transistor having a.c. current gain of 50 is to be used to make an amplifier of power gain 300. what will be the voltage gain of amplifer
AC Input Resistance in Common Base Configuration Ratio of change in emitter base voltage (?V EB ) to the resulting change in emitter current (?I E ) is called in
Review guide: gases: heat, temperature, volume
For an object moving in uniform circular motion, the direction of the instantaneous acceleration vector is: w) tangent to the path of motion x) equal to zero y)
How a CPH products? Answer; no time has passing of a CPH. Thus, CPH exists and never decay.
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