Question

H11P1: LC Tank

Parallel resonant "tank" circuits are common in radio equipment. But unfortunately there is always resistance that prevents them from being perfect: in every real inductor, the wire that makes up the inductance has some resistance, and there may be leakage in the capacitor that can be modeled as a resistance. Also, the Norton resistance of the system connected to the tank circut looks like a leakage through the capacitor. So a realistic model for a tank circuit is the following:
In the space provided below write an algebraic expression in terms of the device parameters for t

Answer 1

value of C?

Answer 2

The antenna tank of a Graymark 536 Radio Kit has an inductance L≈0.65mH. The resistance of the inductor RL≈4.0Ω. The equivalent resistance across the capacitor is RC≈490.0kΩ. The capacitor is variable, for tuning.

If we tune to a station at f=740.0kHz what is the capacitance, in picoFarads, of the tuning capacitor?

incorrect

What is the bandwidth, in kHz, of the tank at f=740.0kHz?

incorrect

If next we tune to a station at f=1570.0kHz what is the capacitance, in picoFarads, of the tuning capacitor?

incorrect

What is the bandwidth, in kHz, of the tank at f=1570.0kHz?

incorrect

So it is apparent that this is not the only circuit in the radio that selects the desired station from stations on adjacent channels.

Answer 3

capacitor is variable

Answer 4

71.16
5-8
15.8
20-25

Answer 5

only 71.16 and 15.8 are correct rest r still wrong help me

Answer 6

no dey r wrong

Answer 7

7
23

Answer 8

H11P2: Scope Probe

We can model the interaction of an oscilloscope with the device under test (DUT) with the following circuit.
A typical modern oscilloscope has an input resistance of Rs=1.0MΩ and an input capacitance of 12<Cs<25pF. Assume that the input capacitance of our oscilloscope Cs=16.0pF. It is connected to the circuit with a 10X probe with resistance of Rp=9.0MΩ. There is a variable capacitor, adjustable with a special tool, that is in parallel with the resistance in the probe. The device under test is modeled as a voltage source with voltage vM.

If the frequency of the source being measured is very low or a DC value, for example vM=0.7V, what is the value of the voltage vS, in Volts, that the oscilloscope sees?

incorrect

The oscilloscope is used to measure and display waveforms at many frequencies. Suppose that VM=0.08cos(2π 130.0×106 t) V. What is the value, in picoFarads, that Cp should be set to so that Vs=0.008V?

incorrect

Suppose now that VM=0.4cos(2π 226.0×106 t) V. What is the value, in picoFarads, that Cp should be set to so that Vs=0.04V?

incorrect

Hmmmmm....

Now suppose that VM=2.0 u(t) V and suppose that just before the step, VCP(0−)=0 and VCS(0−)=0. Assume that the value of Cp is what you computed for the last question. What is the value of vS(0+), in Volts?

incorrect

Answer 9

still wrong

Answer 10

What is the bandwidth, in kHz, of the tank at f=740.0kHz?

Answer 11

22 is corrrect

Answer 12

4

Answer 13

In the space provided below write an algebraic expression in terms of the device parameters for the bandwidth Δω of the impedance Z looking into this tank circuit.

incorrect
71.16

Answer 14

4 is incorrect

Answer 15

h11 p1 a, and c

Answer 16

a) 1/(RC*C) + RL/L

Answer 17

value of c?

Answer 18

c is variable in my question

Answer 19

1st question needs only expression

Answer 20

p1 c?

Answer 21

range of dis ans is from 4 to 10
depending on ur values

Answer 22

itz not working

Answer 23

did u tried decimal values between 4 and 10
coz my ans is 4.3

Answer 24

i have tried but i am getting wrong answer

Answer 25

wats d value of f in ur C) question ?

Answer 26

740khz

Answer 27

ur ans for c) part is surel within the range of 5.1 to 7
chek for all d decimal values dude :)

Answer 28

tnx i got it .................can u also help me in h9 boost convertor

Answer 29

yes
double click on square term and change the value of duty cycle to 58%
and den click on TRAN option on top-left and den without closing d dialog box of transient response
click on check

if correct pls giv Best Response :)

Answer 30

tnx dude

Answer 31

lab 10 boost convertor/?

Answer 32

L-1.6u
C-16221910p
R-10
DRAW A SERIES COMBINATION OF L-C-R n/w wid above values and join d ckt

Answer 33

ac analysis is coming wrong

Answer 34

click on check directly
after joining d series combination wid d ckt diagram n den see

Answer 35

no it s not working

Answer 36

did u put d values as above and dont put the unit by urself coz after entering d values of compnents units are given to it by-default

Answer 37

c the circuit

Answer 38

ckt is correct or not

Answer 39

any luck ??

Answer 40

What is the bandwidth, in kHz, of the tank at f=1570.0kHz?

Answer 41

@abdullatif92211 4.3

Answer 42

@fettah901 sory didn't worked :)

Answer 43

set the L=1.59mH and C=159nF