Answer
Correct Answer is D ( so that there will be a change in the magnetic field required for induction)
Explanation:
Transformer is a device in which electrical energy is transferred between two or more circuits.
Transformer working is based on Faraday’s law of electromagnetic induction. Transformation action in a transformer occur due to mutual induction between two or more winding.
A transformer consists of one or more winding which are coupled magnetically and separated electrically with a magnetic core. A changing or varying current in one coil of the transformer produces a changing magnetic flux due to which an emf (electromotive force ) is induced across the second coil which is wound around the same core.
Therefore a transformer needs an AC due to which a changing magnetic field will be created and due to this changing magnetic field an emf will induced in the second coil.
If DC is used in transformer then magnetic induction will not takes place since DC current will remain constant
Answer:
I think they mean it is really fast or fast paced
Explanation:
The statement 'Not all metals have the same current for a given electric potential' is TRUE. It is conductivity.
<h3>What is conductivity?</h3>
All the metals are able to conduct electric currents, but some metals have a higher conductivity.
Metals are able to conduct electric currents due to the free movement of negatively charged particles i.e., electrons, across the conductor.
The band theory of metals states that metals can conduct electrons (e-) in an electric current by means of the help of the e- valence.
The density of free electrons in metals is around 10^28 m-3, which indicates the number of states at a particular energy level that negative e- can occupy.
Learn more about metal conductivity here:
brainly.com/question/13584414
Answer:
that's true current is discoverd originally by benjimin franklin Followed by tesla and Edison.
Explanation:
The average velocity is 40 km/hr Southeast.
