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Q. Draw and explain an RC integrator, with equations
RC Integrator is a low pass RC circuit in which the output is taken across capacitor. The low pass RC circuit gives considerable gain when low frequency signal is applied. It is because of the high reactance offered by the capacitor at low frequencies. The integrator circuit gives the output proportional to the integral of the input signal.
Voltage across the capacitor Vo = 1/C∫idt
Ie, 1/RC∫Vidt
Vo∝ ∫Vidt
The gain shown by this circuit decreases considerably with increase in frequency. This gives triangular wave to square wave input, cosine wave to sine wave input and a parabolic wave to a triangular wave input.
If aluminium and copper pipes are of same length and diameter ... same magnet dropped through them...in copper it takes more time to come out of other end, i myself have done this.
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Q. Find the number of possible station frequencies in the AM broadcast system in the United States
HOW DOES SINGLE PHASE INDUCTION MOTORS DEVELOP A STARTING TORQUE ?
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