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a) Why does the electric field inside a dielectric decrease when it is placed in an external electric field?
b) A parallel plate capacitor with air among the plates has a capacitance of 8 pF. What will be the capacitance if the distance among the plates he reduced by half and the space among them is filled with a substance of dielectric constant K=6?
Q. What is fluorescence? When an atomic or else molecular system is excited into higher energy state by absorption of energy it returns back to lower energy state in a time les
what is electric field
Evaluate simple harmonic motion A simple pendulum is 2.00 m long. (a) What is the period of simple harmonic motion for this pendulum if it is hanging in an elevator acceler
The drag on a 30-ft long, vertical, 1.25-ft diameter pole subjected to a 30 mph air wind is to be determined with a model study. It is expected that the drag is a function of the p
A 0.500 kg stone attached to the end of a string is whirled in a vertical circle of radius 1,20 meters. The center of the vertical circle is 1.50 meters above the ground. When the
Q. During lightning, it is safer to sit inside car than in an open ground. Why? The metal body of the car offers electrostatic shielding where the electric field is zero. Thro
Q. Explain how Compton scattering confirms the quantum nature of radiation. OR What is "Compton Effect"? Deduce an expression for shift in wavelength of scattered X ray
Production of electricity by light: The Photovoltaic Cell or Solar Cell. A photovoltaic cell generates an emf when light falls onto it. Several forms of photovoltaic cell exi
What is a monochromatic light? Ans: Breaking the word down mono denotes one and chromatic means of colour so a fairly literal translation for the adjective monochromatic w
Damped Simple Harmonic Motion Adding a damping force proportional to x to the equation of easy harmonic motion, the first derivative of x along with respect to time, the equati
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