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consider this you have four units a b c and d you are asked to select two out of these four units how do you go about this particular
magnetismeveryone has seen and handled a magnet in the form of a straight or horseshoe-shaped bar of steel or steel-alloy the magnet was originally
when three quantities a b and c are in gp then the geometric mean b is calculated as followssince these
learning geometric progression vis-aacute-vis arithmetic progression should make it easier in geometric progression also
when three quantities are in ap then the middle one is said to be the arithmetic mean of the other two that is if a b and
capacitor constructionfixed capacitorsfixed capacitors usually consist of sheets of metal foil between which is sandwiched the dielectric or
we know that the terms in an ap are given bya a d a 2d a 3d a n - 2d a n - 1dthe sum of all
factors affecting capacitancethe factors which affect the capacitance of a parallel-plate capacitor are overlapping area of the plates a the
a series is said to be in arithmetic progression ap if the consecutive numbers in the series differs by a constant value this
capacitanceif we increase the voltage between the plates the charge increases but the ratio of charge to voltage remains the same this ratio
capacitorswhen a voltage is applied to a capacitive circuit there is a change in the electric flux the ease with which this change takes place is a
electrical energyelectrical energy is the ability of an electrical system to do workenergy is expended when work is done and the amount of energy
electrical workelectrical work is done if a quantity of charge coulombs is moved between two points which are at different electrical potentials the
methodin this method we eliminate either x or y get the value of other variable and then substitute that value in either of the
before we look at simultaneous equations let us brush up some of the fundamentals first we define what is meant by an equation it is a
the effects of short circuitsa short circuit is a path for current where a path should not exist the path is generally considered to have a low
in this part we look at another method to obtain the factors of an expression in the above you have seen that x2 - 4x 4 x - 22 or
example factorize x2 - 4x 4if we substitute x 1 the value of the expression will be 12 - 41 4 1if we substitute x -1 the
above we have seen that 2x2 - x 3 and 3x3 x2 - 2x - 5 are the factors of 6x5 - x4 4x3 - 5x2 - x - 15 in this case we are able to find
high energy compounds primary need of the animal body from the nutrients is energy free energy is the term used to denote the energy
example multiply 3x5 4x3 2x - 1 and x4 2x2 4the product is given by3x5 x4 2x2 4 4x3 x4 2x2 4 2x x4 2x2 4 - 1 x4
example 1add 4x4 3x3 - x2 x 6 and -7x4 - 3x3 8x2 8x - 4we write them one below the other as shown below 4x4
binomials trinomials and polynomials which we have seen above are not the only type we can have them in a single variable say
thermistorsinsulators and semi-conductors behave in a different way when the temperature increases because their resistivity decreases that is the
alimentary tractthe alimentary tract and the secretary organs associated with it are involved in the process of digestion the sequence of