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Drizzy
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Homework Statement
Can somebody explain what ems is for a person (me) who has only heard of voltage?
http://imgur.com/Y1JQy7w
Lets say the batteries volt is 10V. Is it always going to be 10? Is the batteries ems 10V?
I am not familiar with the term "ems". Can you provide a definition or a source for where you found it?Drizzy said:okay but am I ever going to use emf? For example in this formula: P=VI Is V the emf or is it the ems? basically is ems always ε or can the ems value be put in an equation that containc V?
Ah! Swedish. That would explain it then. So I then interpret ems to be the same as emf in English.Drizzy said:It is in swedish :P I am wondering if the ems is used in P=UI and when do I need the ems value?
You would have to calculate the new current given the new total resistance; Adding resistance to the circuit will decrease the current.Drizzy said:okay so let's say the internal resistance is 1 ohm then the volt is U= 10 - (1*2)= 10 - 2 = 8
so the voltage is 8 then?
Yes. You could also have found the potential drop across R using the current flowing through it: V = (10/6 A)(5 Ω)Drizzy said:oh right I forgot!
the total resistance is 6 ohms
the voltage is 10 V
The current is 10/6
U = 10 - (1*10/6) = 10 - 10/6 = (60/6) - (10/6) = 50/6 = 8.3333333...
is this correct?
I wondered where "s" came from. Is it that?gneill said:Ah! Swedish. That would explain it then. So I then interpret ems to be the same as emf in English.
Voltage and EMF (electromotive force) are two related but distinct concepts in electricity. Voltage is the potential difference between two points in an electrical circuit, while EMF is the energy per unit charge that is supplied by a source, such as a battery.
Voltage is typically measured in volts (V), while EMF is measured in volts per meter (V/m). Both can be measured using a voltmeter.
No, voltage and EMF are not interchangeable terms. While they are both related to electrical energy, voltage refers to the potential difference between two points in a circuit, while EMF refers to the energy supplied by a source.
Both voltage and EMF are important in understanding and analyzing electrical circuits. Voltage is necessary for current to flow in a circuit, while EMF is the driving force behind the flow of current.
Yes, in certain cases, voltage and EMF can be equal. This can happen when there is no resistance in a circuit, and all of the energy supplied by the source is converted into voltage.