Electrical Engineering Answers

A potentiometer wire of length 100cm has a resistance of 10Ω. It is connected in series to to a
resistance R and a cell of emf 2V and negligible internal resistance. A source of emf of 10mV is
balanced by a length of 40cm of the potentiometer wire. What is the value of the resistance R?
A.526.67 ohm
B.70 ohm
C.1580 ohm
D.zero ohm

Find speed of generator when it has 7.5kw, 20 Amps, B = 0.8w/m2, length = 150mm, diameter 200mm, there are 600 conductors at 65 % below the pole.

I just don't understand the 65% below the pole. Does it relate to phase angle or power factor somehow?

Derive mathematical expression of an A.M. wave and indicate the sideband components. Why is the S.S.B. transmission beneficial ?

Draw the time domain wave forms of AM wave for modulation index Ma = 0 and >1.

Write the expression for the channel capacity C of a communication system. If S/N =15 and
B =10,000, calculate C.

Explain, how IC555 timer can be used for recovering a pulse width modulated signal
from pulse position modulated signal?

Calculate the voltage value of a sine wave at 135° whose VRMS= 1000 VAC. Show all work.

Explain the structure of a CCD camera. How are colour signals obtained using a CCD camera?

Let X₁,X₂ ,...,Xₙ be a random sample from a Binomial distribution with parameters n and p, both unkown. Obtain estimators of n and p, using method of moments.

Design and draw π- type high pass filter having cut of frequency of 2kHz and load
resistance of 500Ω.