Back EMF

The counter-electromotive force (abbreviated counter emf, or CEMF ) 1 is the voltage, or electromotive force, that pushes against the current which induces it, is caused by a changing electromagnetic field. It's represented by Lenz's Law of electromagnetism. Back electromotive force is a voltage that occurs in electric motors where there is relative motion between the armature of the motor and the external magnetic field. Counter emf is a voltage developed in an inductor network by a pulsating current or an alternating current. 2 The voltage's polarity is at every moment the reverse of the input voltage 3 4

In a generator using a rotating armature and, in the presence of a magnetic flux, the conductors cut the magnetic field lines as they rotate. The changing field strength produces a voltage in the coil; the motor is acting like a generator.. (Faraday's law of induction.) This voltage opposes the original applied voltage; therefore, it is called "counter-electromotive force". (by Lenz's law.) With a lower overall voltage across the armature, the current flowing into the motor coils is reduced. 5

Pretty self explanatory dont you think, i added this as the previous entry was rubbish and he's obviously visited an engineer who doesn't know what back EMF is.

by Nicker doodle doo May 29, 2007

Bitch Back

Reclaiming your crown.

Speaking your truth and owning it.

Being confident and holding your boundaries.

Got your groove back.
Stepping into your power.
Bad Ass!
OWN IT

"No one's messing with you, you spoke your truth you got your Bitch Back."
"Girl fuck that, get your Bitch Back."

by JMC85 October 15, 2019

Back to school

The phrase you dread seeing most in the summer holidays when you go into town for uniform shopping. Why on earth should stores torture you with a reminder that schools just a few weeks away?

I went into Pound Stretcher and saw what i dreaded most, signs saying 'Back to School'.

by sangajin August 15, 2007

hammock back

When the pattern of a hammock is indented into your back.

I passed out on the hammock for 12 hours and had a bad case of hammock back when I awoke.

by Mitch G. August 15, 2006

Skunk back

Send the skunk back to the woods!

Get the toxic person out of your life or place!

He cheated again, just send the skunk back to the woods!

by I, Wreckerrr July 13, 2021

Turkey-back

Noun - A slang term for people from New England in reference to the Pilgrims and Thanksgiving.

"Look at those matching Turkey-backs in their Patriots jerseys over there. Hey, Turkey-backs! Turkeys up, bro!"

by Indefatigablysardonic June 11, 2020

Back Dimples

Back dimples are a sign of sexual beauty! They are mostly genetic but also common in athletes. They are sexy as hell!!! When you have back dimples it means you have a nice Ass!!!! They are on the lower back and found more common in females then males... but very rare all together!!!

Look at fukkinyeahdimples tumblr for hot ass back dimples!!

by fmot@fukkinyeahdimples December 2, 2014