Explanation
Emf , ε=AdBdt.
εαdBdt (Slope of graph of magnetic field B verses time t)
From the diagram given in question.
In the given graph slope of AB> slope of CD, slope in the ′a′ region slope in the c′c′ region =0, slope in the ′d′ region = slope in the ′e′ region ≠0.
Hence, why b>(d=ε)>(a=c)
A current is flowing through a thin cylindrical shell of radius R. If the energy density in the medium, due to the magnetic field, at a distance r from the axis of the shell is equal to U then which of the following graphs is correct?
It is given that,
Length, l=1m
Current, I=1A
Magnetic field, B=1oersted=10−4Kg/As2
Magnetic force,
F=I(L×B)
F=1(1×10−4sin45)
F=10−4√2
Two infinitely long parallel wires carry equal current in same direction. The magnetic field at a mid point in between the two wires is
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