How does a balanced ring modulator work?
a balanced modulator can use any non linear device which has a response of the form:- i=a+ bv + cv2 +..... it generally utilises a push pull FET circuit or a pair of identical diodes. the modulating voltage is tapped in between and with RF in series is fed to both source of FET. the gate of both FET gets AF and RF, AF tapped from either side of secondary coil makes it 180 deg out of phase. the drain outcome is added by which the phase opp carrier cancells leaving sidebands and modulating freq, which also can be filtered with tuned secondary at load.
What happens if increase voltage in parallel circuit?
If you keep all of them in series, then each component in your circuit will have
more voltage across it and more current through it, and will dissipate more
power (heat).
If you keep all of the batteries in parallel, then they must all be rated for the
same voltage. Nothing about the circuit's performance will change, but it'll be
able to operate longer before the batteries die.
How do you convert mega ohms to mega ohms.cm?
Sorry. You cannot convert ohm-cm to Mohms, just like you cannot convert mph to miles. They are two different concepts.
If you also have the thickness of the material (say along the z axis) in question, then you can divide ohm-cm by the thickness to get to ohm per square. In order to convert ohm per square to ohms, you also need to know the number of squares (the x-y plane).
An example. Let us assume a metal ruler of two cm wide (x), one meter long (y), and 0.2 cm thick (z). Let us assume the resistivity of the metal is 1 ohm-cm. Find the resistance of the metal along the length of the ruler (in the y direction).
Resistivity = 1 ohm-cm
Thickness = 0.2 cm.
Sheet resistance = 1 [ohm-cm] / 0.2 [cm] = 5 ohms/square
Number of squares = 1 [m] / 2 [cm] = 50 squares
Total resistance along y = Sheet resistance * number of squares = 250 ohms.
Q.E.D.
P.S. Note that the term, resistivity, is a general property of the metal, no specific design in mind. Resistance is calculated for a specific object (the ruler) made of the metal. "Square" is not one of the SI units, but "Square" and "sheet resistance" are terms used by engineers to describe thin films.
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What happens when a dc voltage is applied to an inductor?
The equation of an inductor is ...
di/dt = V/L
... meaning that the rate of change of current in amperes per second is proportional to voltage and inversely proportional to inductance in henries.
If, for example, you connect a 200 millihenry inductor across a 12 volt battery, the current will increase at a rate of 60 amperes per second.
Now, the question is, can the inductor, conductors, and/or battery handle that? The answer is no. Something is going to fail. The inductor will rather quickly look like a short circuit across the battery.
This example does not take resistance into account. Practical inductors, conductors, and batteries have resistance, and that will place an upper limit on current but, still, this is not an appropriate way to connect an inductor to a battery.
DO NOT TRY IT IN THE LAB - THERE IS RISK OF EXPLOSION.
How do you measure capacitance?
A capacitance meter is a piece of electronic test equipment used to measure capacitors. Depending on the sophistication of the meter, it may simply display the capacitance or it may also measure a number of other parameters such as leakage, equivalent series resistance, and inductance.
What is the mathematical relationship between current voltage and resistance?
Voltage is the product of current times resistance, V=IR, I is Current and R is resistance.
ANSWER: It is a simple ratio of 1:1:1
Can a 1500 mAh battery replace a 1600 mAh battery?
Yup......But only if u connect them in PARALLEL! Connecting them in parallel (e.g. the positive cap from Battery 1 is connected with the positive cap from battery 2.....the negative cap from battery 1 goes with negative cap from battery 2) adds the amperage (voltage remains the same).......Connecting them in SERIES (as in any flashlight the positive cap of battery 1 goes with the negative cap of battery 2 making a "bigger battery" that has the positive cap from battery 2 and negative cap from battery 1...) adds the voltage (the amperage is the same). Note: Use same batteries either parallel or series connection.
How does increasing the number of cells in a parallel circuit affect the current?
by adding resistance in parallel more current is bound to flow
What is the importance of diode?
the important of diode in electrical circuit is to,,flow the current being regulated to the resistance of the electricity ,,from ac to dc..
Why p type semiconductor is neutral?
becsaus of dopping semiconductor is neuraly filled
when n type semiconductor is mixed with p type, majority charge carrier of n type goes to p type and majority of p type goes to n....... this is called as dopping
Is the total resistance of all the parallel loads more than the smallest individual resistance?
No. Perhaps an analogy would help understand the answer to this question.
When you are at the store, and you are in a line waiting to be paid, opening up another line or more should increase how fast people can move through the store. That is a parallel operation. (If you have to go through one line at the store and then go through another line at the store, that is a series operation).
Similarly, when a current meets a resistance, putting additional resistance in PARALLEL allows some of the current to divert to this new path or paths, allowing more current to flow through the combination of resistances. Since more current is flowing though the combined resistances, the equivalent resistance is less since less resistance always means more flow.
What is the difference between the terminal voltage and the source voltage?
the source voltage is the voltage that measured exactly after the voltage source , but the terminal voltage is the voltage that measured in the load terminals , which equal to the source voltage minus the drop voltage on the transmission line .
What does a multiplexer look like?
Physically a multiplexer usually looks like a box of some sort. More important is what is inside. The inside of a multiplexer contains a switch or switches, a power supply, and the electronic circuits to manage the system.
One link is to informative datasheets for a couple of multiplexer Integrated Circuits from which much can be learned about multiplexer characteristics. There are many, many more kinds of multiplexer ICs.
What is the power dissipated by a resistor with a current of 0.02 A adn a resistance of 1000 ohms?
Power dissipated = I2R
0.022 x 1000 = 0.4 watts
Why are wind turbines so expensive to make?
because the government cant fund for the research and the utilities needed to make wind turbines and because even though they help the environment it still cost workers to make and place and move them to where they needed to be.
How you convert your word document into ieee format?
it is easy to change your document into IEEE format.....
select the content which you need to change and then go to page layout tab, in that click columns and then select two
now you can see that your content will be in IEEE format
What is the EMF equation of alternator?
EMF equation of DC GeneratorE = (ΦNPZ) / (60 * A)
where,
E = e.m.f induced in any parallel path in armature
Φ = flux per pole in weber
N = armature rotation in revolutions per minute (r.p.m)
P = No.of generator poles
Z = total number of armature conductors
A = No.of parallel paths in armature
1st writer: You have Ohms law written wrong, here is an easy formula to use to get the right answer: V/IxR but the answer is .2 Amps (note the right answer)
2nd writer: You both have it written wrong. Ohm's Law is V=IxR. This can be used to solve Voltage, Current and Resistance with two givens. Then, when Power is presented through Watt's Law (P=IxV), you are able to solve for any of the four also with two givens. http://www.aob.com.au/resources.html Here's OUR set-up: I=V/R
This is the substitution: I=12V/60Ω Answer=0.2A OR 200mA
How do you calculate current in a series circuit?
voltage over resistance/impredance.
V
/
I * R
V= Voltage
I= Current
R= Resistance or Impedance
Cover what you want to know and the way the other two are laid out gives you your equation.
Working principle of brushless dc motor?
Traction motors are used in electrically powered rail vehicles such as electric multiple units and electric locomotives, other electric vehicles such as electric milk floats, elevators, conveyors, and trolleybuses, as well as vehicles with electrical transmission systems such as diesel-electric, electric hybrid vehicles and battery electric vehicles. Additionally, electric motors in other products (such as the main motor in a washing machine) are described as traction motors.
How can a capacitor filter the AC and DC?
A capacitor consists of two plates separated from one another by an insulator. These plates are normally thin foil and can be sandwiched around a very thin insulator and wrapped into a small package. Since there is an insulator between the plates, DC connected to the two plates cannot flow as long as you do not exceed the breakdown voltage of the insulator. AC current is a different story. Because the insulator is very thin and the effective plate area is relatively large, a negative charge building up on one plate causes electrons to be repelled from the opposite plate, and as the charge on the first plate reverses and becomes positive, the electrons in the opposite plate are attracted back again. This results in a matching alternating current flow on the opposite side of the capacitor.