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Necessity Of A Starter
For D.C Motors When motor is at rest, then N=0 and due to Eb is directly proportional to N, so
At begin Eb = zero
Thus armature current at the time of starting
Ias = (V-0)/ Ra = V/ Ra
i.e. at begin armature, current can be measured by simply applying ohm's law, As the resistance of the armature winding is very small then the motor will take large amount of present at the time of starting i.e. if supply voltage is 220 V and armature resistance is 0.5 ?, then initializing current will be equal to 220/0.5 = 440A
Prism: A transparent refractive device having of three rectangular and two refractive surfaces is known as prism. N = Sin (A + Dm) /2 Sin A/2 Where a is
How long does it take for reach that speed
Light coupling: Another way to look at light guiding in a fibre is to measure the fibre's acceptance angle. This angle is the angle within which the light should enter the fib
how
derive an expression for the total cross section for the scattering of light by a polorisable molecule in term of the incedent wave length.
The real length of path traversed by a body in a sub interval of time is called as distance. It is the real path travelled by an object among its final and initial positions. It is
Determine the ratio of the frequencies of harmonics in an air column of same length in a) a closed pipe and b) an open pipe
what have you learned about temperature coefficient
Generate and plot a sampled sine wave with f s =8kHz, of 4 seconds duration, with frequency ω 0 = Π/10 and amplitude A = 1 . 2. The waveform equation is x ( n ) = A s
What is a good physics project?
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