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Peltier effect (J.C.A. Peltier; 1834)
The change in temperature generated at a junction among two dissimilar metals or semiconductors while an electric current flow through the junction.
Power is to be supplied from a source whose resistance is 20 K ? to a load of 100 ?. Would you consider it as a constant voltage source or current source? Explain. Ans. G
In the figure below the closed surfaces A and B appear as closed curves. Find the flux through closed surface B.
Specially designed diodes, which give out light radiations when forward biases. LED'S are made of GaAsp, Gap etc.
Q. A rubber ball is dropped to the floor. What force act on the ball to bounce? Does the Earth "bounce" too? Ans. The force of the Earth pushing back on the ball causes
Q. The colour codes of a carbon resistor are yellow, yellow, orange. Tolerance is 5%. Find the resistance. The initial yellow ring corresponds to 4. The subsequent yellow ring
Why it is in general considered easier to determine the electric potential at a given point in space or at a given set of points in space due to a continuous charge distribution th
The integral in Ampere's Law is an integral. Answer: The integral is an integral along (over) a closed path (curve).
Clock spring balance A sensitive balance for use among 0-1 g or 1-10 g is readily made using a piece of clock spring and a block of wood or cotton reel. Fasten the wooden b
Define isothermal process For isothermal process temperature remains constant i.e. Δu = 0. Thus according to first law of thermodynamics ΔQ =Δw Heat supplied to the syste
what is radioactivity?
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