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Joule's laws (J.P. Joule)
Joule's first law
The heat Q generated while a current I pass through a resistance R for a particular time t is given by following
Q = I2 R t
Joule's second law
The internal energy of an ideal gas is independent of its volume & pressure, depending on its temperature only.
Olbers' paradox (H. Olbers; 1826): If the Universe is uniform, infinite & unchanging then the whole sky at night would be bright regarding as bright as the Sun. The further yo
Where is the electric potential because of a single negatively charged particle a maximum? Answer: One could acquire at this one by looking at the formula for the electri
If 3 particles of different mass located at different positions: 1- 1kg position : (0,0) 2- 2kg position: (0,5) 3- 3kg position : (-1,0) If a force of 2 N at 45 degrees is applie
Properties of Lines of Flux To make the imaginary lines of flux describe the behaviour of the magnetic field we must give them appropriate properties. Thus lines of flux have
Finding the centre of gravity of objects Secure a triangular file and place it on a table as a balancing point. Any sharp-edged device with a hat side might be used. Balance se
Describe with the help of a labelled diagram the underlying principle and working of a step-up transformer. Why cannot such a device be used to step-up D.C. voltage? Or Dr
The natural angular frequency of a S.H.O. of mass 2gm is 0.8rad/sec. It undergoes critically damped motion when taken to a viscous medium. Evaluate the damping force on the oscilla
(a) Show that the total power in a 3-phase, 3-wire system using the two-wattmeter method of measurement is given by the sum of the wattmeter readings. Draw a connection diagram.
Construction and working of michelson interferometer,.how will you use it to measure the wavelength of a monochromatic light.
Why are some flashlights brighter than others?
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