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There are two parts of Thermionic emitters:-
A) Directly heated emitter
(i) Cathode is directly heated by passing current.
(ii) Thermionic current is less.
(iii) Energy consumption and life is short.
B) Indirectly heated emitter
(i) Cathode is indirectly heated.
(ii) Thermionic current is more.
(iii) Energy consumption and life is long.
A ferrite core has less eddy current loss than an iron core because ferrites have (A) High resistance. (C) Low permeability. (B) Low resistance. (D) High hyster
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When the wavelength of wave remains unchanged, the scattering is known as elastic.
In the experiment, under which of the following circumstances is the angular momentum L of the movable puck NOT conserved? a) The net torque = 0. b) The radius r is always perpen
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Explain briefly, with the help of circuit diagram, how V - I characteristics of a p-n junction diode are obtained ii (i) forward bias, and (ii) reverse bias. Illustrate th
does sodium sulfate contain both ionic and covalent bonds
A single-phase, 50Hz transformer has 40 primary turns and 520 secondary turns. The cross-sectional area of the core is 270cm 2 . When the primary winding is connected to a 3
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Two Stage Rocket Suppose the motion of the two-stage rocket or the corresponding velocity-time graph below. The rocket has two successive fuel stages followed through a free-fa
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