What is the formula for e.m.f?
Check our answers to ‘What is the formula for e.m.f?’  we found 17 replies and comments relevant to this matter. The best answers are submitted by users of Wiki.answers.com, ChaCha and Yahoo! Answers.
Best solution

Answer:
emf = I(R+r) = IR + Ir = V + Ir
Other solutions

What is the Formula for magnitude of of the induced emf of a wire
Answer:
By the laws of electromagnetic induction, when the flux through the coil changes the induced emf is...

What is the formula for electromotive force (emf) in physics?
Answer:
Electromotive Force (emf) is that which tends to cause current  actual electrons and ions to flow.

The book I have basically says voltage is emf and vice versa.... they use the formula E= vLB E I think is voltage.... v is velocity... so when they ask you to find E induced are they asking you to find the voltage induced? I thought they usually ask...
Answer:
First off they call voltage in this case "EMF" , because the voltage is induced by moving...

Anyone know how to calculate back (counter) emf?
In a RL circuit (DC supply) I was wondering what formula to use to calculate what the back EMF in the circuit? Cheers.
Answer:
For a DC motor the back emf generated E in the armature is in opposition to the applied voltage V, So...

What are alkyl halides and what is the generalized formula?
what are the ethers and give the generalized formula. what is an aldehyde, give the generalized formula. what are ketones, give the generalized formula. what are the amines, give the generalized formula. what are esters, give the generalized formula...
Answer:
Hi Monica, what are alkyl halides and what is the generalized formula ?              ...

Is potential drop across the inductor is its back emf?
suppose current is I(a+jb)..then potential drop is w*L*j*(I*(a+jb)).bt the back emf comes to different if i take the vector notion to sin form and apply the formula LdI/dt...plz help...
Answer:
No .. an emf results from an energy conversion into electrical energy .. the potential drop is due to...

Answer:
E=IR+Ir  This is the equation for EMF. E = wd/Q The EMF is the work done when unit charge flows through...

Proof the formula V/EV=R/r? V voltage, EEMF, R resistance box, r constant?
Answer:
The electromotive force is E, it's internal resistance is r. There is a resistance R in series, connecting...

What is the formula to work out emf value if it has 3 tesla at 20cm length and it rotates at 20ms?
Answer:
It depends on the area of the loop. E=d(B*A)/dt where A is the area of the loop that is exposed (perpendicular...