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Gravitational field can also be shown by lines of force. This is same in several ways as that of electric lines of forces. With one dissimilarity, electric charges are negative and positive which causes force of attraction among dislike charges and repulsion among like charges. While in phase of gravitation the force is always of attraction.
A line of force is drawn in such a way that at every point the direction of field is tangent to line that passes by the point. Thus tangent to any point on a line of force gives the direction of gravitational field at that position. Lines of forces are given in such a way that their density is proportional to the strength of field.
Explain 'drift velocity of free electrons'? Derive Ohm's law on the basis of the theory of electron drift.
Wires A as well as wire B are both made out of copper. Both of wires have the same length. The diameter of wire B is doubles that of wire A. Answer: Resistivity is a charac
What are links and symbolic links in UNIX file system? A link is a second name (not a file) for a file. Links can be used to allocate more than one name to a file, but cannot
a. Consider an x-ray machine with a step-up transformer consisting of a primary coil of 100 turns and a secondary one with 50000 turns. If the voltage applied across the primary co
Pauli exclusion principle (W. Pauli; 1925) No two similar fermions in a system, like electrons in an atom, can have an equal set of quantum numbers.
Passing Lane A passing lane or overtaking lane is the lane on a multi-lane highway or motorway closest to the center of the road or the central reservation.
Can the batteries used in the torch lights be recharged after their discharge? Give reason? Ans) No,because the NH4Cl corrods the zn containger gradually.so with out anode redox
a) Here temperature difference of junction is used to produce thermo e.m.f. and vice-versa. b) This effect produced when junctions of a thermocouple are kept at dissimilar tempe
Explain the Merits of Vacuum Diode over Semiconductor Diode (i) Vacuum Diodes can withstand high reverse voltages (ii) Vacuum Diodes can operate at fairly high temperature
What are the sources of dispersion in optical fibers? Sources of Dispersion into Optical fibers: The key sources of dispersion of pulses within optical fibers can be catego
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