0
EMF is basically a term for voltage. Two rules that are often used in calculations are:
1) Kirchoff's Voltage Law, which states that the total voltage around a closed loop is zero. Alternately, the voltage provided by a battery (for example) is equal to the voltage drop accross one or more connected resistances.
2) Ohm's Law: V=IR (voltage = current x resistance).
For more details, and example, I would suggest consulting a high school (or first-semester college) book about electricity.
Wiki User
∙ 11y ago
Wiki User
∙ 14y agoThe emf of a battery depends mainly on the chemistry of the cells it uses. Lead-acid, carbon-zinc, alkaline, nickel-metal-hydride, lithium, etc. each have a different voltage per cell. The only general statement you can make that is true for all types is that a battery -- a series stack of cells -- has a total open-circuit emf equal to the product of the emf-per-cell multiplied by the number of cells.
Add your answer:
Earn +20 pts
How are emf measured?
emf in volts
Does motional emf call induced emf?
yes indused emf is also called motional emf. If an open coil is subjected to a variable magnetic field, at the ends of the coil a potential difference is induced which is called induced emf. If a coil is connected to an emf source and switched on, the rising current will produced an variable magnetic field which in turn produces an emf. It is called back emf.
While discharging which is greater TPD or EMF?
EMF is greater
How do you prove the existence of back EMF?
How do you proof of the existence of back emf ?
How do you find average back emf?
Normally emf can be calculated by the following formula e=N*(dф/dt) where dф/dt = rate of change of flux linkages In actual practice it is given as e=-[N*(dф/dt) ] because as per lenzs law the voltage induced in a direction to oppose the very cause for it i.e., change in flux linkages. vydehi
How are emf measured?
emf in volts
Why emf of battery driving potentiometer is greater than emf of the cell to be measured?
Bcoz the emf which is to be measured is less than emf of driving cell....
Does motional emf call induced emf?
yes indused emf is also called motional emf. If an open coil is subjected to a variable magnetic field, at the ends of the coil a potential difference is induced which is called induced emf. If a coil is connected to an emf source and switched on, the rising current will produced an variable magnetic field which in turn produces an emf. It is called back emf.
When did EMF - band - end?
EMF - band - ended in 2009.
When was EMF - band - created?
EMF - band - was created in 1989.
While discharging which is greater TPD or EMF?
EMF is greater
How do you find average back emf?
Normally emf can be calculated by the following formula e=N*(dф/dt) where dф/dt = rate of change of flux linkages In actual practice it is given as e=-[N*(dф/dt) ] because as per lenzs law the voltage induced in a direction to oppose the very cause for it i.e., change in flux linkages. vydehi
Do Emf waves travel at the speed of light?
What is the range of the EMF spectrum
How do you prove the existence of back EMF?
How do you proof of the existence of back emf ?
Do all emf waves travel at the speed of light?
What is the range of the EMF spectrum
When was Unbelievable - EMF song - created?
Unbelievable - EMF song - was created in 1990.
What happens to emf as a battery is used?
The emf of a batter as it is used will stay the same.
