Christmas wishes-merry Christmas!-Happy Christmas!

Merry Christmas!-Happy Christmas!

merry Christmas

• "May the lights of Christmas be your guide and the Christmas tunes fill you with cheer."

merry Christmas!-Happy Christmas!

• "This is my desire for you: significant serenity, thriving as the year progressed, the satisfaction that duplicates wellbeing for you and yours, enjoyment around each corner, vitality to pursue your fantasies, the delight to fill your occasions!"

merry Christmas!-Happy Christmas!

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• Christmas is the gentlest, loveliest celebration of the rotating year—but then, for all that, when it talks, its voice has a solid expert.

merry Christmas!-Happy Christmas!

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• "As we give presents at Christmas, we have to perceive that sharing our time and ourselves is such a critical piece of giving."

merry Christmas!-Happy Christmas!

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• Christmas might be multi-day of devouring, or of supplication, however, dependable it will be multi-day of recognition—multi-day in which we consider all that we have ever adored.

merry Christmas!-Happy Christmas!

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• "Whatever else be lost among the years, let us keep Christmas still a sparkling thing: Whatever questions ambush us, or what fears, Let us hold close one day, recalling its powerful significance for the hearts of men. Give us a chance to get back our untainted confidence once more."

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Thomson method-To determine the value of e/m of electron using the bar magnet method.

AIM: To determine the value of e/m of electron using the bar magnet method. To determine the value of e/m of electron using the bar magnet method. J.J. Thomson, the discoverer of the electron, first determined in 1897 the ratio of the charge e of the electron to its mass m by applying electric and magnetic fields to a narrow beam of cathode rays. A Cathode Ray Tube (CRT) is a convenient device for determining e/m ratio of the electron. A narrow electron beam is produced in it and the beam can be manipulated by impressed electrical and magnetic fields over a small length of the electron path. The electric field produced by a short length of deflection plates and the magnetic field is applied from outside over the same length. APPARATUS: A cathode ray tube (CRT), a power supply, two bar magnets, deflection magnetometer, and wooden frame with scales fixed on its arms. FORMULA VD e/m = ---------------- x 10 11 C/Kg

Thermistor-To determine the values of energy gap, Eg-limiting value of the resistance Ro

Aim: 1 . To determine the values of the energy gap E g , for a given thermistor for two different values of current passing through it. 2. To determine the limiting value of the resistance R o. thermistor Conventional carbon and wire wound resistances have very less effect of temperature on their values of resistance. There is about 0.4 % change in the resistance value per degree change in the temperature. They are also linear i.e. they obey Ohm’s law. However, there is a class of resistances which are temperature sensitive and show a significant change in their resistance values with temperature. Such resistances are called thermistors. A change of about 6% to 8 % in their resistance values is observed with change in temperature. They are non-linear resistances. Thermisters are used as current limiters, temperature sensors, self-resetting overcurrent protectors and self-regulating elements. The first NTC thermistor was discovered in 1833 by Michael Faraday, who reporte

Cathode ray oscilloscope (CRO) for voltage (AC AND DC)

AIM: 1. Use of cathode ray oscilloscope (CRO) for voltage (AC AND DC) and frequency measurement (direct method) 2. To determine the frequency of unknown source using Lissajous pattern. Cathode Ray Oscilloscope (CRO) Cathode Ray Oscilloscope (CRO) is a versatile measuring instrument. The electrical parameters associated with ac signals such as voltage, current, frequency, phase etc. can be most conveniently measured using CRO. It not only measures these parameters but also displays the nature of the applied signal. (Analogue and digital meters are incapable of displaying the nature of the applied signal. Moreover , these meters do not measure peak value but they measure RMS values). Apart from the use of CRO for direct measurements of an electrical signal, it can also be used for measuring different physical quantities such as temperature, pressure, light intensity etc. with the help of transduce

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