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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
an object moves along the x axis according -to the equation x(t)=(3t^2-2t+3)m .determine (a) the average speed b/n t=2sec and t=3sec,(b) the instantaneous speed at t= 2s and t=3s (
A carbon steel plate (thermal conductivity = 45 W/m o C) (600 x 900 x 25) mm 2 is maintained at 310 o C. Air at 15 o C bellows over the hot plate. If convection heat transfer co-e
How can Newton rings experiment be used to determine refractive index of liquid? The experimental arrangement for Newton's rings set up is made with the plane convex lens pla
Action and reaction are always equal and opposite.Then,how does a body moves?
Wiedemann-Franz law: The ratio of thermal conductivity of a particular pure metal to its electrical conductivity is approximately constant for any given temperature. This law
Explain 'drift velocity of free electrons'? Derive Ohm's law on the basis of the theory of electron drift.
which electronic level would allow the hydrogen atom to absorb a photon but not to emit a photon
Lambert's laws (J.H. Lambert): Lambert's first law The illuminance on a surface illuminated through light falling onto it perpendicularly from a point source is propor
the factors which decide the broad area of scientific activity ?
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