Help with circuits and ohms law?
i have a 6V battery with 1.2Amphour. I have a switch which switches it from parallel to series or vise versa. I have 2 bulbs in place for parallel and 2 bulbs in place for series. Supposedly just the bulbs ohm is 4. so we know for the series circuit each bulb is producing 5.50 V when i switch it. For the series when i switch to series i am getting like 2.9V from each bulb. What i then did was divide the V/I to get my amp. And when i do this my amp from parallel is twice that of the series, is there a connection mistake or what is the reason i am getting these results. My science fair is tomorow any help please I NEED AN ANSWER KNOW PLEaSe. thnak you
How do i use a Cerwin Vega MX250 Front Woofer Re-edged MXW-12?
You need an amplifier - not a powerhouse as those were very efficient speakers (they play very loud with a small amount of power). They do work best with an older receiver vs the new cheap stuff on the market. I once refoamed a similar model with the same woofer and listed them on Craigslist. I used a 33w/ch receiver from the 1980s that had LED power meters on it. The buyer thought that little receiver was a joke at first.... when the meters were just blinking at the 10 watt level - the music was so loud that we could not even scream at each other. So you don't need a lot, just a 3.5mm to RCA stereo cable and some little older receiver off Craigslist.
What viva questions can be asked for 1st & 2nd year electrical engineering?
There are boundless questions that can be asked regarding technical branch.I'll discussed few important once. You can go through this thoroughly on Internet or in some books.~ Basic ohms law.. You might feel funny but please mind that many of the engineering graduates don't remember the correct relations used in this law. ( Just google it, you will find the accurate answer.)~ why do we use AC and not DC in our power system network?~ Conversion of star and delta technique~ Relation between line voltage, phase voltage, line current and phase current in star and delta system~ why don't transformer work on DC?~ why transformer are rated in KVA and not in KW?~ Types of losses in transformer~ explain about hysteresis loss~ Rectifier, inverter, transistor ( basic principles)~ single line diagram~ kvl, kcl, maximum power transfer theorem,superposition theorem, independent and dependent sources~ linear and non linear circuit, passive and active circuit, lumped and distributed network, unilateral and bilateral circuit~ mutual inductance and self inductance ( how it works?)~ clipper and clamped circuitAnd to be continued......You might have got the idea. Hope this helps you.!!
If batteries are connected in parallel, do the output amps increase?
Bear in mind your question as a result of the parallel connections will have two differing currents.The battery capacity to deliver in amperes, which basically is fixed and predefined andthe current to be drawn and delivered to certain load(s)!Although related, the two types of currents you are asking for are different! One is dependent on the capacity to deliver, while the other is dependent on the amount as demanded by the load?Supposedly connecting batteries in parallel will / can provide a better power handling capacity… Better in away that it will prolong the operation / usage of a particular device. A good example is the battery in a smartphone. Let say for normal usage will only last for 24 hours of continued use, but when connected to an external battery pack will / may more than double / extend normal period of operation.The practice of putting /connecting batteries in parallel alhough possible is being avoided! Certain restrictions and conditions must be followed or satisfied to ascertain its proper and trouble free operations. Battery condition such as the following must be strictly observed for each cells to be connected!Identical batteries Age and conditionThe same Size and battery capacity andChemical characteristics must be identical!must have a polarity reversal protectiona small series resistance in place for current balancingthermal cutout..
When the voltage across a resistor increases and the resistance stays the same, then what will happen to the resistor?
The currrent flowing through the resistor will increase proportionally, causing it to dissipate more heat, but if your not careful; the larger current could cause the resistor to exceed its power rating, and overheat… which can become very problematic. It's always good to stay a little under what its rated for, to account for a small margin of error, for example, the smallest variations in your power supply could damage the resistor if your too close to its wattage rating. To calculate the current flowing through it, find the voltage across it and divide that by its resistance according to Ohms Law: V=IR. Then to calculate the power being consumed, multiply that value by the voltage across it according to the power formula: P=IV. Or, you can use this equation as a shortcut: P= (V^2)/R.
What is superconductivity?
superconductivity is a phenomenopn occuring in certain materials at low temperatures, characterised exactly be zero resistance and the exclusion of the interior magnetic field. Tin aluminium, alloys, heavily doped semicoductors etc, show this.