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Reverse polarity means connecting a power source, or polarised componenet, with the positive and negative poles the wrong way round.
If the positive and negative supply is connected the wrong way round in electronic devices, it usually causes damage, because semiconductors are sensitive to polarity.
Sometimes protection is provided, so that reverse polarity stops the device from working without causing damage.
Connecting a diode (or rectifier) in reverse, will block the flow of current, without causing damage and is useful in protecting circuits from reverse polarity.
In some consumer electronics (especially CB Radios) the power input has a recitifier across the 12v supply.
If it is wired correctly, the rectifier is in reverse polarity, does not conduct and allows the radio to work.
If you reverse the polarity of the power supply, the rectifier is now in full conduction, across the supply, causing a dead short. This shunts any power away from the radio and blows the fuse in the line, thus protecting it.
Wiki User
∙ 12y ago
Wiki User
∙ 8y agoEarth's magnetic field lines up in the opposite of the present magnetic field
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Why doesn't the peristaltic pump work in reverse?
its suddenly stop working, left leg and arm
What is an example of polarity?
The definition of Polarity is -The uneven distribution of charges across a molecule -.so examples of polarity would be *water molecule with 2 positive hydrogen atoms and 1 negative oxygen atom *left hand and a right hand *east and west -.it's basically anything that is opposites
Can you use the word polarity in a sentence?
the polarity of the battery is reversed
What is the geomagnetic reversal time scale?
The geomagnetic reversal time scale has patterns of polarity. It is the pattern of alternating and reserved polarity in rocks.
How can you make your spherometer more sensitive?
By using an electromagnet with a variable resister to finely-balance your spherometer's intrinsic, counter-clockwise torque--assuming that you are in the northern hemisphere. If you are in the Southern Hemisphere, then you'll simply need to reverse the polarity of your electromagnet.
What can reverse magnetic polarity make?
What can reverse magnetic polarity
What problems are there with reverse polarity?
Reversing polarity ,changes the rotation of the device you are changing polarity on.
How can you reverse the rotation of barlow's wheel?
Reverse the polarity of the magnet.
99 beetle heat fuse reverse polarity?
i don't believe you can reverse the polarity on a fuse, they simply regulate the amperage of the circuit they protect,
Can reverse polarity burn a tv set?
If, by 'reverse polarity', you mean the accidental reversal of the line and neutral conductors at the socket outlet or receptacle, then the answer is no.
How do you reverse polarity in math?
multiply by -1...
Did the armature voltage reverse its polarity?
yes
Why is dc welding develop?
we will have straight polarity and reverse polarity,we can produce the weld with good quality
Did the earth experience normal or reverse polarity 1.5 million years ago?
Normal polarity.
Is the LM3914 IC protected against reverse polarity?
i would never naturally assume any circuitry to be "reverse polarity" by default even if they are. since this can fry a lot of IC, and micro controllers. there are several options to adding a reverse polarity protection circuit to your project you can find three easy to implement circuits here: http://provideyourown.com/2012/reverse-polarity-protection-circuits/
How the polarity of a compound will affect on both normal phase and reverse phase mode chromatography?
Separate strictly the words phase shift and reverse polarity. Scroll down to related links and look at "Phase shift". Scroll down to related links and look at "Reverse polarity".
What happens if you reverse DC polarity of a lamp?
nothing
