a coil of a wire is situated in a 0.5 T uniform magnetic field. The area of a coil is 2.0m^2.what is the magnetic flux if the angle between the magnetic field and the normal to the surface of the soil is 60 degrees ? after 5s, the magnetic field is now parallel to the normal to the surface. what is the induced emf ??

.. PLEASE .. I NEED THE ANSWERS .. :)) HELP MEEEEE

Question

a coil of a wire is situated in a 0.5 T uniform magnetic field. The area of a coil is 2.0m^2.what is the magnetic flux if the angle between the magnetic field and the normal to the surface of the soil is 60 degrees ? after 5s, the magnetic field is now parallel to the normal to the surface. what is the induced emf ??

.. PLEASE .. I NEED THE ANSWERS ..  :)) HELP MEEEEE

anonymous · Answer

flux linked is given by$$\phi = E S\cos \theta$$
here area is taken as a vector in the direction of normal 
hebce in the given case phi= 05*2*1/2=1/2H/m^2
Induced emf is $$\epsilon= d \phi /dt$$
here change flux is 1/2 H/m^2
hence induced emf is 1/2*1/5=0.1V