Question

A circular loop with the radius r=10cm is placed in a variable magnetic field: B(t)=0.1sin(400pt )(T). Calculate the maximum intensity of the electric current flowing through a resistance R=10 Ohm connected to that loop.

Answer 1

S=π*r²
B=A*sinω*t
Ф=B*S*Asinω*t
e=-dФ/dt=-ω*A*S*cosω=-Emax*cosω*t
Emax=ω*A*S
Imax=Emax/R=ω*A*S/R
A are valoarea 0,1 T
ω=400*π rad/s
Se obtine Emax in V si Imax in Amperi.
Succes la medii mari!