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the nuclei have been separated on the basis of the number of protons atomic number or the total number of nucleons mass number as given belowi
fast neutrons can be changed into slow neutrons by certain materials known as moderators when last moving neutrons pass by a moderator they
neutron is a fundamental particle which is necessary constituent of all nuclei except that of hydrogen molecule it was discovered by chadwick1 the
rutherfords alpha-scattering experiment recognized that the mass of atom is concentrated with small positively charged region at the centre which is
in a perfect instrument the zeros of the major scale and circular scale coincides with each other in that situation screw gauge has zero-error or
rules to verify how many significant numbers has in a calculated quantity1 all nonzero digits are significant as like 457 cm has three
i the size examines cannot be operated to derive relations other than product of power functions for example s ut 12 at2 or y y0 cosomegat and
rule 1 in order to sum or subtract two physical quantities the quantities must have the similar dimension the final physical quantity has the similar
kelvin kelvin is the fundamental unit of temperature it has quantity of zero where the molecular activity of gases ceasesmole mole is the fundamental
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