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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)?
Direction of the Angular Velocity Vector In physics, the angular velocity is described as the rate of change of angular displacement and is a vector quantity (more preci
What is the Ohm Law? Ohm discovered that the amount of current was directly proportional to the voltage (more voltage gives more current) and inversely proportional to the resi
An equiconvex lens has the radius of one curved surface is 0.12 m and focal length of 0.10 m. Determine the refractive index of the material of the convex lens.
Can the whole charge of a body is transfer to another body
Q. In Young's double slit experiment the distance between the slits is 1.9 mm. The distance between the slit and the screen is 1 m. If the bandwidth is 0.35 mm Compute the waveleng
If a hydrogen atom in its ground state absorbs a photon with a wavelength of 93 nm, it jumps to an excited state. What is the value of the energy in that excited state?
Can you explain normal mode oscillation? Compare between Q 1 and Q 2 mode oscillation
A helium atom is in a galaxy travelling at a speed of 4.89 x 10 6 m/s away from the Earth. An astronomer on Earth observes a frequency from the helium atom of 6.52 x 10 14 H
The mass of a mol of proton and electron is: (1) 6.023x 10 23 g (2) 1.008g and 0.55mg (3) 9.1x 10 -28 kg (4) 2gm Ans: (2) 1.008g and 0.55mg
Q. Define Fermi energy. Write down the expression for Fermi Dirac distribution law. Deduce an expression for Fermi energy of a system of free particles. Sol. The Fermi Energy
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