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Electromagnetism: A temporary magnet formed by winding a coil of insulated copper wire around a piece of shift iron is known as electromagnet. When current is passed it behaves
Define: Electric potential. The electric potential in an electric field at a point is define as the amount of work done in moving a unit positive charge from infinity to that
Explain the Process of Phase Changes Matter exists in three forms: as a solid, a liquid or as a gas. These are called phases of matter. If we take a chunk of ice (solid water) fr
a car of mass 800kg is pulling a trailer 300kg where sin a=1|200.Resistance to motion(apart from gravity) is 1.5N per kg of mad for each vehicle.calculate the pulls of the engine
Eddy currents can be briefly explained as currents produced due to induced emf in the form of eddies or ripples. Hysteresis laws mainly consists of 2 topics retentivity and coerci
Used normally, a 150-watt, 120 volt light bulb requires how many amps of current? Ans: Used generally, a 150-watt, 120 volt light bulb needs 1.25 amps.
(a) Explain the term 'capacitance' of a capacitor. Derive an expression for the total Capacitance of 'n' capacitors arranged in series. (b) Explain the term 'capacitance' of
Balmer series (J. Balmer; 1885) An equation that describes the emission spectrum of hydrogen while an electron is jumping to the second orbital; four of the lines are into the
The temperature of a body is measured indirectly by making use of the fact that certain physical property of a substance changes linearly with the temperature If the value of th
The energy band formed by a series of energy levels having valence electrons is called as valence band. At 0 K, the electrons fulfill the energy levels in valence band initialising
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