What is the difference between emf & current
Answer / hemant patel
"emf' is the potential difference across a source of
electricity when there is no current through the source,
i.e when the circuit is not closed.
It is the maximum potential difference across the source.
When the circuit is closed there is current inside the
source and hence there is a drop of potential across the
internal resistance of the source. Hence the potential
difference across the terminals of the source will be less
than the potential difference when there is no current.
The maxium potential difference is called emf of the source.
Voltage is the other word used for potential difference
across any two points.
Is This Answer Correct ? | 12 Yes | 2 No |
what is the principle used in electromagnetic spectrum?and why there is a necessary of having an electron with unpaired spins?and how the uncertainity principle is used to determine the frequency of an spectral lines ?
What is tone control?
What is the smallest size of plane mirror in which a man can see his fill image length ?
The magnitude of electrostatic force between two identical positive ions that are separated by a distance of 5.0 x 10– 10 m is 3.7 x 10–9 N. (a) What is the charge of each ion? (b) How many electrons are “missing” from each ion?
2 Answers College School Exams Tests, DELL, Sony,
How do you convert from pascal to torr?
Explain what is h1n1?
When a bar of iron is heated,it expands. What will happen to it's weight when it is heated
What is the advantage of fixed pulley?
Explain what is optical medium?
what is the importance of frequency?
Explain the Amorphous ?
What is the translucent?