# Search results

Thanks...
2. ### How this comes?

i tried a lot but answer goes wrong.. i didn't touched with calculus since long time...May be it is because of this... For the integral of 1+cos(2t) gives 2T+sin(2T).
3. ### How this comes?

Let me know how 1/2 comes from it.see attachemet
4. ### Find the length of this line associated with a circle

I am struck in a place where i have to find length of a line(a in fig i.e between P1 and P2) in the form of r and Angle A. Refer to the figure: All information available are r,O,P2,and A.
5. ### Function of enable input in gates

when the enable is at low the gate/I.C will be disable and when the enable is at high the gate/IC will be disable...but told that To allow input pulses to pass from input to output of the gate, then the "enable" input has to be low...what is correct..if you have any external link about it then...
6. ### Function of enable input in gates

what are the function of enable input in gates? If in or gate we use it and it is at high and the other two inputs are at low then what will be out put...1/0? Please clear me about the enable input
7. ### Perpetual machine by using free energy of magnets Possible?

Does magnets posses free energy? Does the machine shown in image will run? If no...give reason... I know it seems to voilate 1st law of thermodaynamics...But why it voilates it?

9. ### A+2b=2a+b=>1=2. please tell me what is the problem

if we get: a+2b=2a+b =>a-b=2a-2b =>a-b=2(a-b) =>1=2 I can't figure out the problem in it..please tell me
10. ### Prove (100-100)/(100-100)=2

Thanks every body.. I got some more stuff like this which results 2=1.. i will post it
11. ### Prove (100-100)/(100-100)=2

I got this question from my friend and he solve it like this: 100-100 10^2-10^2 (10-10)(10+10) (10+10) ----------- = -------------= --------------- = ----------- =2 100-100 10(10-10) 10(10-10) 10 Please...
12. ### RC constant of capacitor in RC circuit as a filter

From the book of Electronic devices by thomas L-Floyd i attached a RC filter circuit here.. What i understand there is the point that in charging there is no resistance to the current coming into capacitor so it will charge instantly or take a little time because of the resistance of diode.and...
13. ### RC constant of capacitor in RC circuit as a filter

We know that for RC circuit as filter or in multiplier we use capacitors having larger RC constant than the period of input signal.but I am confused here: As long as i know the charging and discharging period of a capacitor are equal wether it is fully charged or not...(tell me i am right or...
14. ### How may signals travel through a cable without interfernce?

I am an Electrical Engineering.I want to ask that how different signals move in a cable without effecting each other..e.g interference etc.. I am not strictly speaking about it interfence but how at the end we can differentiate these signals and get one of our need.
15. ### How I & V have inverse relation in power equation and direct relation in ohm law.

i mean here when we step up 220 volt then current is reduced and voltage is increased...
16. ### How I & V have inverse relation in power equation and direct relation in ohm law.

I am confuse at a point that is: I equation P=IV there is an inverse relation between I and V But according to ohm law there is direct relation between I and V. How in in ac Power transmission line 1100 volt cause small current than 220 volt... please solve my this trouble... Everyone...
17. ### Which shock is dangerous: 1.High V &Low I. 2.Low V & high I.

Which shock will be most dangerous for human 1.High Voltage and low current or 2.High current and low voltage
18. ### When a man get a shock(current) why he is cought then thrown away?

When a living thing get a current shock then current catch him for sometime and then throw him away? Why this happen? Why the wire(or something else from where current is coming) catch him and then thrown him after the current stops or the thing died?
19. ### Where the energy goes in half wave rectifier?

you mean the energy of current which i blocked by diode is transfred when the diode is farward biase?
20. ### Where the energy goes in half wave rectifier?

Half wave rectifier based on the principle of PN junction diode convert either possitive or negative portion of AC current But i am confused here that when the portion of current on which the diode is reverse biased current is almost zero then where the energy of that portion goes?

22. ### Is the garvitay depend upon medium and is gravitaion force is quantized?

i havn't.but i will search this book on internet. thanks
23. ### It is earthed or not?

Let suppose we are prforming an experiment to verify ohm 's law. We connect a power supply with resistor and also insert an ammeter but the wires connected with the ammeter are touching the earth. then these wires should be eathed i.e the p.d at these points will be zero and all current will...
24. ### It is earthed or not?

and because of this reasistance experimentors not take this into considration during the experiments involving low voltage?
25. ### Is the garvitay depend upon medium and is gravitaion force is quantized?

Is the Gravitational force between the two bodies depend upon the medium between them?and is the gravitaional force is quantized?
26. ### Is timedailtion dialtion takes place wth obsrver on earth observing highspeed rocket?

Suppose I am standing on the Earth surface and observing a rockhet of very high speed then i will see the length the rocket contracted and abserver on the rocket will also see my length contracted(I am not sure about it)in the direction of motion. Is the same case takes place with time...
27. ### It is earthed or not?

In our Physics lab I always confuse about that durin the experiment our teacher don't avoid the touching of live connecting wires with earth(table made up of cement and have tiles on its surface). Is tiles are non conductor? and if there are no tiles than it will be earthed or not?
28. ### Effect of motion on E.field of charge.

We know that with motion of charge m.field is produce but what will happen to its E.field during motion. Is it will remain constant or reduce. Are during motion vectorially E+B is equal to the E at rest. Is their any equation showing their relation.
29. ### Problem in calculating young mudulus

Young moduls can be given as: Y=(F/A)/(dL/L) but in area i am confused because sometine for cylindrical shape it is taken as 2(pi)r*L and sometime simply (pi)r^2. Please deffrientiate these cases:
30. ### Pricinple of symmetry

Is the principle of symmetry is universal? i.e every particle has an anti particle,similarly maxwell derive his equations by using symmetry.
31. ### Problem in equilance

Is garvitational force depend upon meium?
32. ### Problem in equilance

I had a problem that the principle of equilance is saying that one can't say either he is acclerating upward or standing in garvity. but i am saying that it is possible b/c in gravity when two bodies are falling under the action of gravity then as time passes they become closer to each other...

what factors i had to take into account by buying a thermistor for my project of heat detector? my project circuit is attached.
34. ### Effect of motion of a charge in two differenct refrence fremes

A moving charge produce a megnetic. But every motion is relative so I want to ask that If a charge is in motion w.r.t one observer but not in motion w.r.t other then what will each observe about the magnetic field of charge?
35. ### Getting down of battery in ideal situation

our teacher says that when there is an ideal short circuit whic connecting the two terminal of the battery then the battey will get down quickly. Is this is correct when in ideal short circiut battery is not supplying any energy or power.
36. ### Getting down of battery in ideal situation

In Ideal Short circuit i.e the resistance of the medium is zero,there is no power delivered by the source(batterey which involve chemical reactions and have no internal resistance i.e ideal).Then is the source Get down or not.If yes then why?
37. ### Absence of m.field around an AC current carrying wire

One of my friend says that it is possible that there will be no magnetic filed around an AC current carrying wire but he did,t know about the reason. can anyone give the reason
38. ### For two abjects of same material the following law must obeyed

One of our teachers says that For two abjects of same material the following law must obeyd. i.e the ratios of their masses will be equal to the ration of their areas, wether this law works for objects of same shape or different? what is the name of this law? give me a link from which i...
39. ### Ohm law in transformer

I know about the power i am failed in managing this that how ohm law is working here. If you have a link from where i can get information about this then please give it.
40. ### Physics Seeking a job in physics forums.com

I am doing engineering .I want to get a job in physics forum.can i get
41. ### Ohm law in transformer

In transformer when voltage increases on secondry coil then current decreases but i am confuse here that how ohm law is obeyed here. as V is d.proportiona to Current. please advise...

I am confused on a question that arises in my mind: that is "After passing the resistor the amount of current flowing through cross section of area is decrease or the energy of charges i.e Potential decreases".
43. ### Is magnetic field is produced by uniformly moving charge?

THE production of magnetic affect the E.field of the charge?
44. ### Internal resistance source

No this is not home working question. there is no information about the internal resistance in our course bot this question arise in mind and so i do it here
45. ### Attaining speed of light

I don't know about the details of relativity but know about it,s results. Is from this equation the velocity of light is attainable or not by the motion of two bodies having speed less than C
46. ### Is magnetic field is produced by uniformly moving charge?

Let suppose a man have charge in his hand and runing the he will not feel the magnetic field field of charge by a compass and a man standing near to him will detect the magnetic field by his compass?
47. ### Actual definition of charge?

not of the unit of the charge but of elementry charge
48. ### Attaining speed of light

Every one know that the speed of light "c" is unattainable but IS half the speed of life is attainable? i.e 1/2(c) If we get two bodies of 1/2(c) speed then by moving these bodies in opposite direction the spees of light is attainable? Is it possible?
49. ### Is magnetic field is produced by uniformly moving charge?

Is magnetic field is produced by uniformly moving charge?is it affect it,s magnetic field? Is Magnetic field of charge is due to relative motion?
50. ### Internal resistance source

Is the internal resistance of the battery or other source is variable or not? without discharging . Is it depend upon on the external resistance?