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a) Why does the electric field inside a dielectric decrease when it is placed in an external electric field?
b) A parallel plate capacitor with air among the plates has a capacitance of 8 pF. What will be the capacitance if the distance among the plates he reduced by half and the space among them is filled with a substance of dielectric constant K=6?
Q. Why the centre of Newton's rings pattern appears dark? The thickness of the air film becomes zero at the point of contact of lens L with glass plate P. Therefore there is no
Why does heat cause matter to expand? Water contracts as it cools, like all other liquids, unless it reaches a temperature of about 4 degrees Celsius, at which point it enlarge
why can one ignore quantization of charge when dealing with macroscopic charges
Electrical Properties of Dielectric Material A loss of energy which eventually produces a rise in temperature of a dielectric placed in an alternating electric field is calle
Why is heavy water used as a moderator? Heavy water is a type of water highly enriched in the hydrogen isotope deuterium. We can conclude the neutron interactions with billiard
Define the term intrinsic stand-off ration in UJT. Ans: Intrinsic Stand-off Ratio: Equivalent circuit of a UJT is demonstrated in fig. (a). Emitter diode forms the junctio
Plot the Bremsstrahlung emitted (intensity vs energy) from a copper target for (i) both 15 keV and 30 keV electrons, (ii) for 15 keV electrons at both 10 and 50 mA current and (iii
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A triode valve which is acting as an amplifier gives a voltage gain of 30. If anode resistance is 20 K ? for valve and load resistance is 60 K ?, what is value of amplification fac
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