some electronics related ques...help plz...

[umang]

> G(s) = 10/S(S+2) then the natural frequency of this transfer function is
a) 3.146
b) 4
c) 5
d) 2

> In TV video amplifier is used for =?

> Avalanche photo diode is used when compared to PIN diode bcz
a) larger band width
b) high sensitivity

> quantization noise occurs in??

> schering brige method used for measuring of??

> if speed doubles,distance increases what is the torque in dc motor?

> what is instrument used in MIC instrument?
a)galvonometer b)ammeter

> what is the use for sweeping resistor in transistor??

> rms current in half wave rectifier?

> range of radio telemetry...

 

[rwiggins]

q: G(s) = 10/S(S+2) then the natural frequency of this transfer function is
a) 3.146
b) 4
c) 5
d) 2

Answer: Will have to get back to you...

q: In TV video amplifier is used for =?

Answer: Video amplifiers are used to amplify signals that represent video information. Video amplifiers are most often used when there is need to amplify an attenuated video signal or there is need to split a video signal from one video source to many video devices.

q: Avalanche photo diode is used when compared to PIN diode bcz
a) larger band width
b) high sensitivity

Answer: b) high sensitivity

q: quantization noise occurs in??

Answer: Quantization noise is a model of quantization error introduced by quantization in the analog-to-digital conversion (ADC) process in telecommunication systems and signal processing.

q: Schering brige method used for measuring of?

Answer: A Schering bridge is an AC bridge circuit used to measure capacitance as well as the dissipation factor of capacitors.

q: If speed doubles,distance increases what is the torque in dc motor?

Answer: If you double the voltage that you apply to a DC motor it will double the rpm and it will double the torque.

q: what is instrument used in MIC instrument?

a)galvonometer
b)ammeter

Answer: a)galvanometer

q: RMS current in half wave rectifier?

Answer: Vm/2RL

q: Range of radio telemetry

Answer: well, the Deep Space Network receives signals from spacecraft millions of miles away, so the answer depends on the power of your transmitter verses the efficiency of you antenna factoring in how noisy the environment is, etc.

 

[vaibhavar]

1) Transfer Function = GH/(1 + GH)
= Av / ( s^2 + 2*(zeta)*(Wn)*s + (Wn)^2)

which gives natural frequency (Wn) = sqrt (10) = 3.16


Rest all answers are as given by rwiggins...



Regards
Vaibhav

 

[rwiggins]

q: G(s) = 10/S(S+2) then the natural frequency of this transfer function is

a) 3.146
b) 4
c) 5
d) 2

Answer: a)3.146

Sorry it took me so long to get back to you. Hope it helps.

Added after 26 seconds:

doh! already answered.

 

[umang]

@ rwiggins

> thank you very much for your kindly help....
> well, i have also posted some more of my ques's, if u can help it out plzzzz......

 

[umang]

> damping is proportional to gain, sqrtof gain, 1/gain or 1/sqrt of gain

> In electrodynamometer type wattmeter the error is due to..
a) pressure coil inductance
b) pressure coil resistance

> In distribution lines_____
a) X/R<0.1
b) X/R>10
c) X/R>1
d) X/R<0.01

> In EHV lines _____
a) X/R=10
b) X/R=100
> Insulators in EHV lines are designed based on_____
a) switching voltages
b) peak voltages
c) corona
d) lightning voltages
> The value of restriking voltage depends on______
a) inductance of line
b) capacitance of line
c) both
d) none