Answer:
0.2v
Explanation:
Data given,
Diameter=18.5cm
Hence we can calculate the radius as D/2=18.5/2=9.25cm
radius=9.25cm/100=0.0925m
The area is calculated as
[tex]area=\pi r^{2}\\Area=0.0925^{2}*\pi \\Area=0.02688m^{2}\\[/tex]
magnetic field, B=1.3T
time,t=0.18s
The flux is expressed as
[tex]flux=BAcos\alpha \\[/tex]
since the loop is parallel, the angle is 0
Hence we can calculate the flux as
[tex]flux=1.3*0.02688cos(0)\\flux=0.0349Wb\\[/tex]
to determine the emf induced in the loop, we use Faraday law
[tex]E=-N\frac{d(flux)}{dt}\\ E=-0.0349/0.18\\E=0.19V\\E=-0.2v[/tex]
Note the voltage is not negative but the negative sign shows the current flows in other to oppose the flux
