Answer:
Induced emf through a loop of wire is 3.5 V.
Explanation:
It is given that,
Initial magnetic flux, [tex]\phi_i=1.7\ Wb[/tex]
Final magnetic flux, [tex]\phi_f=0.3\ Wb[/tex]
The magnetic flux through a loop of wire decreases in a time of 0.4 s, t = 0.4 s
We need to find the average value of the induced emf. It is equivalent to the rate of change of magnetic flux i.e.
[tex]\epsilon=-\dfrac{\phi_f-\phi_i}{t}[/tex]
[tex]\epsilon=-\dfrac{0.3\ Wb-1.7\ Wb}{0.4\ s}[/tex]
[tex]\epsilon=3.5\ V[/tex]
So, the value of the induced emf through a loop of wire is 3.5 V.
