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Infra-Red (IR) Detectors:
An IR detector has an impedance of Z= (400+j200) ? . During design tests the detector current is measured as 4 µA.
What is the output voltage of the detector?
Optic lens:
Using a converging lens of focal length f = 10 cm, we want an object to appear on the screen twice as big as its original size.
Where is the object to be located in front of the screen (real image)?
A particle is projected from ground with velocity 40sqrt2m/s.find- a)velocity and b)displacement of particle after 2sec .Take g=10m/s^2 Ans) velocity v=u+at a=-g v=40√2-10*2
What is Attenuation? Attenuation: Attenuation is a reduction within the amplitude and intensity of a signal. This is a significant property into optical communications. This
candela; cd The basic SI unit of luminous intensity described as the luminous intensity in a given direction of a source which emits monochromatic photons of frequency 540 x 1
Conservation of Energy Conservation of energy is not all about turning off the computer when you are not using it. Energy is not created or destroyed, it just changes forms. En
A 65g ball with a diameter of 3.1cm begins at rest and rolls down an incline. The angular acceleration of the ball is a constant 0.55rad/s2. ( I ball=(2/5)mr2 ) Calculate the net t
calculate the frequency of radiation which must be incident on a substance placed in magnetic field strength so that the electron can absorb energy
a ball is thrown horizontally from a point 100 m above the ground with a speed of 20 m/sec .find the time it takes to reach the ground...
Write a mathematical expression for deviation produced by a thin prism and illustrate the terms.
does lights of different wavelengths help us to see different colour
about beam intersection in gama and alpha beam?
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