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Working Principle of D.C Motor
A) An electric motor is a machine which changes electrical energy into mechanical energy.
B) When a current carrying conductor is placed in a magnetic field, it experience a mechanical force whose way is given by " Flemings Left hand rule" & magnitude is given by F= B.I.L Newton
C) When field magnets are excited and armature conductors are supplied with current from supply main, they experience a force tending to move the armature. Armature conductors under N-Pole are supposed to carry current in (crosses) and those under S-Pole to carry current out (dots).
As seen from above, a playground carousel is rotating counterclockwise about its center on frictionless bearings. A person standing still on the ground grabs onto one of the bars o
Can radiations like gamma rays and x-rays be made prevented to enter a place by a magnetic field? Ans) Rutherford noted that gamma rays were not deflected (or at least, not easi
What occures to the normal shift when the thickness of the optical medium is decreased? Write down the expression for equivalent focal length of combination of two thin lenses d
Laws of limiting friction
Explain logarithmic decrement? Evaluate the ratio of nth amplitude with 1st amplitude in case of under damped oscillation.
Define the term multi-mode fibre shortly. Multi-mode fibre: This type of fibre permits more than one mode to travel by this. As this has to permit more number of modes to tr
Surface Mount Devices (SMDs) are new components designed with soldering pads or short leads. They are much smaller in size as compared to leaded components. The SMDs are directly a
A transformer has 124 turns on the primary coil and 18,600 turns on the secondary coil. a. Is this a step-down or a step-up transformer? step-up transformer
Write down the relation between focal length and power of a lens. Write down the expression for the equivalent focal length of two thin lenses separated by a distance.
why raise in ppotential is taken as positive
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