Why is inductance measured in Henrys?
One henry is also the value of the mutual inductance of two coils arranged such that an electromotive force of one volt is induced in one if the current in the other is changing at a rate of one ampere per second.
What is Faraday famous for?
Best known for his work on electricity and electrochemistry, Faraday proposed the laws of electrolysis. He also discovered benzene and other hydrocarbons. As a young man in London, Michael Faraday attended science lectures by the great Sir Humphry Davy.
Why EMF is more than potential difference?
The emf of a cell is greater than its terminal voltage because there is some potential drop across the cell due to its small internal resistance.
Can EMF be greater than the potential difference?
The emf of a cell is always greater than its terminal voltage. Because emf is the potential difference across the two terminals of a voltage source when it is not connected to any circuit. And once it is connected to a circuit, the voltage reduces slightly because of the internal resistance of the voltage source.
Is potential difference less than EMF?
1 Answer. When a cell is in closed circuit, i.e., when current is drawn from it, then the potential difference between its electrodes is called the terminal voltage. It is always less than the e.m.f. because when charge flows in a circuit, some energy is spent in the flow of charge through the electrolyte of the cell.
Why is terminal voltage is less than its EMF?
The so-called terminal voltage of a battery is lower than the emf when it is discharging because of the voltage drop across the internal resistance.
What is the resistance of ideal voltage source?
The internal resistance of an ideal voltage source is zero; it is able to supply or absorb any amount of current. The current through an ideal voltage source is completely determined by the external circuit. When connected to an open circuit, there is zero current and thus zero power.
Why the emf of a cell is always greater than its terminal voltage?
The emf of a cell is greater than terminal voltage because the potential difference between the two terminals is not connected to any of the circuit. If it connects to the circuit then the voltage is automatically reduced because of the internal resistance.