Zhenjiang u2 visual photography

A, AC current can pass through the capacitor, the voltage of the secondary coil U2 =10× 220 = 22v, and the current in the secondary coil I2=U2R is always greater than > 3.3A (where 1R is always =1kloc-0/R2+6544).

B, T = 2ωω= 0.02, f= 1T50Hz, and b is correct;

C. The voltage of the secondary coil U2 = 1 10×220=22V, so P2 = P2 = P2=U22R2=48.4W, and C is correct;

D, according to the magnetic flux φ = bs, B and S are equal, so the magnetic flux change rate is equal, so D is wrong;

So choose BC