Analog Circuits Interview Questions 

so.. i have no sound. the headunit seems to be doing its thing but when i look at both my amps they have no lights. i checked the in-line fuse and it seems fine.. isnt popped or anything. i even took the amp out and checked inside (no burnt smell). i also looked for an onboard fuse on the amp but couldnt find any when i opened it. it's a jl audio (250/1 and 300/4). i'm assuming it just doesnt have a built in fuse. i just want to know where i should go from here.. should i just take them to circuit city to test and see if they are blown for $20 each?

so i got a multimeter. i tested for dc and the line moved a little on the analog meter. i did this by touching the black probe to ground and red to power. (i'm just writing this to make sure i'm using it correctly). as for the reading.. not sure if this number is right but 25 (DCma?) any ideas?

please can someone help me!!! i have been ask to disign a simple amp and a power amp, its my first year in college with no electronics background i cant really understand the specification requirement. i've gone through analog electronics books but i just need to know the transistor (collector current) before i can go on with the calculations to design the circuit.
the requiremnts are:simpe amp (1): input voltage 100mv effective, output should be adjustable from 0 to 2V. (2): input impedance 100kohms. (3): amplification 0 to 20 times. (4):frequency at least 60HZ to 18KHZ (-3 db points). (5): output impadance 1Kohms. class AB amp. (1): speaker 4 ohms. (2): power 1 watt (3): there should not be destortion at 1khz input signal of 1V effective, cross over time if pressent should not be more than 50us. (4): frequency parameter at lest 100HZ to 15KHZ (-3 db points) please i will be very greatfull if someone can help me cos it my second project in school and i really love it.

Hi, im trying to build an RF ID transceiver which will output an analog signal to a microcontroller to complete a task. I have never built one before and was hoping someone can give me some pointers or point me to somewhere to get a feel for how the circuit is going to be constructed.

Can you please help me in my EE Theory Laboratory Subject?
These are the questions in our experiment.

**I AM USING ANALOG
1. In measuring the voltage, is it possible to use the 3-V range and 300-V range? Why? Explain.

2. Draw a linear scale with number calibrations 0,1,2,3 etc. through 10. Set off each major subdivision into 10 minor subdivisions. Show where 8.3 on the scale.

3. Which resistance is in the center of the ohm scale R x 1?

4. How is voltmeter connected in the circuit? (three resistors in series) if one of the resistors is to be measured (volts): Show the diagram.

5. How is ammeter connected in the circuit (three resistors in series) if the current is to be measured (amperes): Show the diagram.

6. What are the precautions to be taken in measuring voltage, current, and resistance?

Alright, I drive a tractor trailer for a freight company. Of course, there are no radios in the truck. What we(drivers) do is build a box with speakers and a car radio mounted in it. There are bannana plugs on the dash to get power from. Now The only problem is that everytime you shut the truck down the radio will lose it's memmory (presets, Volume level, etc). I could get an analog radio but that is just out of the question. I was thinking more along the lines of a secondary power source. Like connecting a 9V battery connector to the memmory wire so when the truck is off it will still hold it's memmory. Seeing that the radio won't work without this wire being hooked up to the trucks power I would have to incorporate a diode of some sort so I don't fry the battery. What kind of diode should I use and Where should I put it in the circuit? I can't mess with the truck, so whatever I do has to be done in my radio box. Thanks for any info....

when measuring an unknown voltage with an analog VOM, you should first
a) set the switch to the lowest range and then move it to a higher range until you get an accurate reading
b) set the switch to the highest range and then move it to a rangethat gives the most accurate reading
c) ground the meter
d) ground the circuit

Alright, I drive a tractor trailer for a freight company. Of course, there are no radios in the truck. What we(drivers) do is build a box with speakers and a car radio mounted in it. There are bannana plugs on the dash to get power from. Now The only problem is that everytime you shut the truck down the radio will lose it's memmory (presets, Volume level, etc). I could get an analog radio but that is just out of the question. I was thinking more along the lines of a secondary power source. Like connecting a 9V battery connector to the memmory wire so when the truck is off it will still hold it's memmory. Seeing that the radio won't work without this wire being hooked up to the trucks power I would have to incorporate a diode of some sort so I don't fry the battery. What kind of diode should I use and Where should I put it in the circuit? Thanks for any info....

21. The pointer of an analog meter is connected to a
A. permanent magnet. C. coil suspended by bearings.
B. electromagnet. D. voltage to frequency converter circuit. 22. What is the resistance in a circuit that has a voltage of 60 V and a current of 2 A?
A. 10 O C. 60 O
B. 30 O D. 120 O 23. What is the power dissipated by a resistor with a current of 0.02 A and a resistance of 1,000 O?
A. 0.4 W C. 20 W
B. 4 W D. 200 W 24. In a circuit, two resistors of 100 O and 80 O are connected in parallel. The parallel group is then
connected in series with a 100 O resistor. What is the total resistance of the circuit?
A. 280 O C. 120 O
B. 144 O D. 44 O 25. What is the power of a parallel circuit with a resistance of 1,000 O and a current of 0.03 A?
A. 0.09 W C. 9 W
B. 0.9 W D. 30 W

What a scam, The FCC is forcing everyone with an old analog tv to buy a new one or you won't get reception by 2009. There goes our tax check to stimulate the economy. Its going to Best Buy and Circuit City. If your out of work maybe you can get a job there. LOL
The goverment giveth the goverment take it awayth

http://www.thenewsenterprise.com/article...

1. What is the total resistance in a circuit that contains three 60 W resistors connected in series?

A. 20 W
B. 60 W

C. 120 W

D. 180 W




2. What type of circuit measurement is made by placing a meter's test leads in parallel with a deenergized component?

A. Current
B. Resistance

C. Voltage

D. Power




3. What is the total current of the circuit shown in the figure below?



A. 10 A
B. 3 A

C. 1 A

D. 0.1 A




4. A series circuit contains four resistors. In the circuit, R1 is 80 W, R2 is 60 W, R3 is 90 W, and R4 is 100 W. What is the total resistance?

A. 70.3 W
B. 250 W

C. 330 W

D. 460 W




5. What is the voltage at points B and D in the figure shown below?



A. 4 V
B. 6 V

C. 8 V

D. 10 V




6. Which one of the following is the correct power formula?

A. P = IR
B. P = E/R

C. P = EI

D. P = I2/R




7. What is the total resistance of a circuit that contains two 100 W resistors connected in parallel?

A. 10 W
B. 30 W

C. 50 W

D. 150 W




8. Which of the following is the correct Ohm's law formula used to find current?

A. I = R/E
B. I = E/R

C. I = E2/R

D. I = PR




9. The figure below shows a DC motor that contains a series field winding (F1) with a resistance of 10 W, a parallel field winding (F2) with a resistance of 20 W, and an armature with a resistance of 2 W. What is the total resistance of this motor?

A. 11.82 W
B. 16.4 W

C. 24 W

D. 32 W






10. If the voltage in a circuit is 24 V and the current is 2 A, what is the total power in the circuit?

A. 6 W
B. 48 W

C. 72 W

D. 102 W




11. What does the abbreviation VOM stand for?

A. volt-ohm-megohm
B. volt-ohm-milliammeter

C. volume-ohm-microamp

D. volume-origin-megohm




12. What is the voltage drop across R4 in the diagram shown below?



A. 10 V
B. 30 V

C. 70 V

D. 80 V




13. Which of the following is the correct Ohm's law formula used to find resistance?

A. R = EI
B. R = E/I

C. R = PI

D. R = I/E




14. What is the total power in a circuit with a current of 4 A and a resistance of 12 W?

A. 4 W
B. 16 W

C. 48 W

D. 192 W




15. A circuit contains four resistors connected in series. R1 is 100 W, R2 is 200 W, R3 is 240 W, and R4 is 600 W. What is the total circuit resistance?

A. 1,200 W
B. 1,140 W

C. 600 W

D. 80 W




16. What is the power dissipated by the parallel resistor circuit shown below?



A. 10 W
B. 48 W

C. 60 W

D. 100 W




17. What is the power dissipated by R2 in the circuit shown in the figure in Question 16?

A. 5 W
B. 12 W

C. 16 W

D. 33.3 W




18. Which one of the following voltages should never be measured directly with a VOM?

A. 100 V
B. 500 V

C. 800 V

D. 1,200 V




19. Which of the following is the correct formula for finding power in a DC circuit?

A. P = IR
B. P = I2R

C. P = ER

D. P = E2I




20. What is the voltage in a circuit with a resistance of 100 W and a current of 0.04 A?

A. 4 V
B. 8 V

C. 10 V

D. 40 V




21. The pointer of an analog meter is connected to a

A. permanent magnet.
B. electromagnet.

C. coil suspended by bearings.

D. voltage to frequency converter circuit.




22. What is the resistance in a circuit that has a voltage of 60 V and a current of 2 A?

A. 10 W
B. 30 W

C. 60 W

D. 120 W




23. What is the power dissipated by a resistor with a current of 0.02 A and a resistance of 1,000 W?

A. 0.4 W
B. 4 W

C. 20 W

D. 200 W




24. In a circuit, two resistors of 100 W and 80 W are connected in parallel. The parallel group is then connected in series with a 100 W resistor. What is the total resistance of the circuit?

A. 280 W
B. 144 W

C. 120 W

D. 44 W




25. What is the power of a parallel circuit with a resistance of 1,000 W and a current of 0.03 A?

A. 0.09 W
B. 0.9 W

C. 9 W

D. 30 W

hey iam trying to amplify the voltage output. iam using MPX5500. how much can i amplify. I have ordered a wrong sensor. Instead of 20Kpa sensor i have ordered 500Kpa sensor. my project is due in a week and i have no time to order the next sensor. How do i do the modification of the 500kpa sensor. something have to be done to the input analog volatge. the maximum pressure i need is 20Kpa and the graph of the sensor is giving 0.4 volts offset. If i amplify the circuit will the , will the error be amplified or reduced.

am doin ma engg(computers)
n i hav electronic circuits as 1 of ma sub....
i mean..y is it so hard to get the correct output in the analog lab..inspite of the ckt bein correct n stuff...
the equipments cannot b a prob either..(atleast dats wat the coll people say)..
seeing the correct output in CRO has bcum a lotterty 4 me..
pls help..i hav the lab xam in 2 weeks..any tips of hw to debug a ckt wud b appreciated..
thanx...

I've lost the small length of cable that connects the Xbox guitar controller's cable to the Xbox 360, and can't seem to find anywhere to buy a replacement for this.

The cable I'm missing seems to be some sort of analog-to-USB adapter. The way I've described the missing part seems vague, but I believe anybody with a copy on Xbox 360 will know what I mean.

I did my best to search the web and could not find another case of this happening, but figure I can't be the only one who's lost it. I searched the logical batch of stores (Best Buy, Circuit City, the Redoctane website and the Guitar Hero website [however broken it may be]) but could not find a replacement, likely because I'm not sure what to call the piece I'm looking for.

So, if anyone has any information on this missing piece I'd really appreciate it. Thanks.

Much has been said about the mathematical analogies between certain mechanical and electrical systems. See the following for example:

http://www.swarthmore.edu/NatSci/echeeve...

"LCR" circuits lead to differential equations that result in oscillatory behavior---the three essential components in electric circuilts being the inductor (L), capacitor (C), and resistor (R). They have their mechanica analogues.

Water flow dynamics share some analogies as well with such mechanical and electrical circuits, such as resistance through a pipe or constriction. Given a high tank of water and a lower place for water to drain to, can a "water circuit" be devised, involving no moving mechanical parts, that can result in oscillatory behavior, per the same kind of differential equations? Would it be possible to make a school science project to induce water, in flowing from a high to a low place, to oscillate?

can i use adc 0804 without external sample and hold circuit. the analog signal is slow varying. also iam using only the 4 msb only.