What is the term for producing a current by changing a magnetic field?
2 answers:
<u>Explanation </u>:
When a coil is placed in changing magnetic field then a current will induced in the coil. The current caused due to changing magnetic field is called as induced current.
Due to changing magnetic field an emf is induced in the coil. Emf is defined as the rate of change of magnetic flux in the coil
This emf then causes induced current in the coil. It is given by :
Hence, by changing a magnetic field an emf is induced which in turn causes induced current.
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Answer:
(a) 1000 N/C
Explanation:
Kinetic energy of electron, K = 1.6 x 10^-17 J
distance, d = 10 cm = 0.1 m
Let the potential difference is V and the electric field is E.
(a) The relation between the kinetic energy and the potential difference is
K = e V
V = K / e
Where, e be the electronic charge = 1.6 x 10^-19 C
V =
V = 100 V
The relation between the electric field and the potential difference is given by
V = E x d
100 = E x 0.1
E = 1000 N/C
(b) The force acting on the electron, F = q E
where q be the charge on electron
So, F = -e x E
It means the direction of electric field and the force are both opposite to each other.
The direction of electric field and the force on electron is shown in the diagram.
