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Define the terms threshold frequency and stopping potential in relation to the phenomenon of photoelectric effect. How is the photoelectric current affected on enhancing the
(i) frequency
(ii) intensity of the incident radiations and why?
Derive second law of thermodynamics According the thermodynamics II Law, *efficiency never be unity or never exceed unity. *Coefficient of performance never be infinite
A large sculpture is lowered into place by a crane. The sculpture has a mass of 2225 kg. When the sculpture makes contact with the ground, the crane slowly releases the tension in
A 415V 3-phase a.c. motor has a power output of 12.75kW and operates at a power factor of 0.77 lagging and with an ef?ciency of 85%. If the motor is delta-connected, verify
A body which gets its real configuration immediately and completely after the removal of deforming force from it, is called as perfectly elastic body. Phosphor bronze and quartz ar
Suppose you blow the top of a bottle and hear a resonance sound (standing wave). The length of the bottle is about 25cm. If the speed of sound in air is about 340 cm/sec., what i
What is force?
Example of state function
You watch a distant carpenter driving his nails into the side of a house at a regular rate of 1 stroke per second. You hear the sound of the blows exactly synchronized with the bl
In a Newton's ring set up, the gap between the glass plate and the lens is filled with a transparent liquid. If the liquid is replaced by a second liquid, the rings shrink. Which o
The contribution of ionic polarization takes account of the fact that when in a molecule some of the atoms have an excess positive or negative charge (resulting from the ionic char
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