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Electric Motor:
A device, which converts electric energy into mechanical energy is known as Electric Motor.
Factors on which the speed of Rotation of Motor Depends:
The speed of rotation of motor depends on the following factors.
1. Magnitude of current passing by the motor.
2. Strength of magnetic field.
3. Number of turns in the coil of the motor.
4. Permeability of its armature.
With the help of neat & labelled diagram. Explain the principle & working of a moving coil galvanometer. What is importance of radial magnetic field.
Faraday's laws of electrolysis (M. Faraday) Faraday's first law of electrolysis At time of electrolysis the amount of chemical change is proportion
Rayleigh-Jeans law For any blackbody at thermodynamic temperature T, the radiancy R onto a range of frequencies among nu & nu + dnu is provided by R = 2 pi nu 2 k T/c 2 .
Gauss' law (K.F. Gauss): The electric flux by a closed surface is proportional to the algebraic sum of electric charges contained in that closed surface; in differential form,
How many types of fibers end are there? Basically there are two types of fibers end are: adhesive encapsulated and state of the art fused, though some manufactures dispense alo
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
give examples of like and unlike parallel forces
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
mass=volume * density.By using this formula we can find the mass of sphere. Volume of sphere=(4/3)pi*r^3 V=(4/3)*3.14*(1*10^-2)^3=4.187*10^-6 Mass=(4.187*10^-6)*900=3768*10^-6kg
Resistors of 20Ω ,20 Ω and 30Ω are connected in parallel. What resistance must be added in serieswith the combination to obtain a total resistance of 10 . If the complete
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