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State whether the following statements are true or false:
(a) The purpose of a transistor amplifier is to enhance the frequency of the input signal.
(b) The gain of an amplifier is the ratio of the output signal amplitude to the input signal amplitude.
(c) The output characteristics of a transistor relate the collector current to the base current.
(d) If the load resistor value is increased the load line gradient is decreased.
(e) In a common-emitter amplifier, the output voltage is shifted by 180? with reference to the input voltage.
(f ) In a common-emitter amplifier, the input and output currents are in phase.
(g) The dynamic current gain of a transistor is always greater than the static current gain
Write a short note on different kinds of capacitors. Applying Gauss's law derive the mathematical expression for electric intensity due to a charged conducting spherical shall
actually in my college we are going to celebrate department function for physics we have to keep demos in physics for a project but i don''t have any idea will u help me
Explain the Prisms, Dispersion and Color A ray of white light that passes through a prism is dispersed into the visible spectrum. Red light is refracted the least, and purple lig
A circular hole of radius r at the bottom of an initially full water container is sealed by a ball of mass m and radius R (>r). The depth of the water is now slowly decr
terrestrial telescope
a drawing pin is pushed against a wooden table with force of 10N. calculate the pressure exerted by the pin at a point on table if area of point is 0.01m square
Olbers' paradox (H. Olbers; 1826): If the Universe is uniform, infinite & unchanging then the whole sky at night would be bright regarding as bright as the Sun. The further yo
Why does heated air expand? Temperature is often explained as the average thermal energy of the substance at hand. Therefore the hotter a substance is the more thermal energy i
Human Eye: It is spherical in shape, diameter about 2.5 cm, having of three layers. a) Sclera b) Choroid
One mole of an ideal gas at 0°C is compressed adiabatically reversibly to a pressure of 20 times its initial pressure. Evaluate the final temperature.(γ=1.4)
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