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coulomb coulomb is the fundamental unit of charge it is explained as the charge required to obtain 9109 newton of force among two equal charges
the elctric field in a certain region of space has components ex 60 nc ey 70 nc and ez 0 find the electric flux though the surface x 6y 0 lt x lt
i meter the presently accepted definition of meter is the length of path travelled by light in space in 1299792458th secondii kilogram kilogram is
the earths rotation about its axis changes measurably over time you dont have to worry about the details all you need to know is that our days are
1consider the centripetal acceleration due to the earths spin for a cwru student sitting in strosacker auditoriumthe radius of the earth is r 63781
they are exactly analogous to water pressure and water flow by a hose thats why flowing electrons is known as a current just like a water
ans in the first one fmathe only force which acts is fwhich causes an acc of a to the body of mass mand as the forcegtfmabut on the secondlet maf2
two concentric conducting shells a and b are of radii r and 2r a charge q is centred at their center shell b is then earthed and a is given charge q
the units that may be derived from fundamental units are known as derived
the physical value which does not depend on any other physical quantity is known as a fundamental physical quantity like length mass and time are
a quantity that can be calculated by instrument clearly defined and has proper units is known as physical value physical quantities are described as
the operation of a logic gate or circuit can be shown in a table which have all possible inputs and their corresponding output is known as the truth
the digital circuit that can be examined with the help of boolean algebra is known as logic circuit or logic gate a logic circuit has two or more
when the curve is not simple or linear as diode valve is known as non-ohmic
there are two parts of thermionic emitters-a directly heated emitteri cathode is directly heated by passing currentii thermionic current is lessiii
i the procedure of ejection of electrons from a metal surface by the application of heat is known as thermionic emission and emitted electrons are
it is based on the photovoltaic effect one of the semiconductor regions is made so thin that the light incident on it reaches the p-n junction and
at high reverse voltage due to high electric field the minorities charge carriers while crossing the junction acquires very high velocities a chain
when reverse bias is enhanced the electric field at the junction also enhances at some stage the electric field becomes so high that it breaks the
as electron hole pair because of thermal collisions is continuously formed in the depletion region these are a regular flow of electrons in the
because of concentration difference holes or electron try to vary from their side to other side only these holes or electrons cross the junction
i it is also known as impure semiconductorii the phenomena of adding impurity is known as
a pure semiconductor is known as intrinsic semiconductor it has thermally formed current carriersi they have four electrons in the outer part of
1 holes works as virtual charge although there is no charge on holes2 effectual volume of hole is more than electron3 mobility of hole is fewer than
the higher power level band is called as the conduction bandi it is also called as empty band of minimum energyii this band is partially filled by