(1) within 0 ~ 4 s, the change rate of magnetic induction intensity B △B△t=0.2? (? 0.2)4 T/s=0. 1T/s，

Due to the uniform change of magnetic flux, the induced electromotive force generated in the coil of 0 ~ 4 s is constant.

According to Faraday's law of electromagnetic induction, the magnitude of induced electromotive force in 0 ~ 4 s coil E 1=N△B△t? ab？ BC = 10×0. 1× 1×0.5 = 0.5V

According to Lenz's law, the induction direction in the coil is counterclockwise.

The amount of charge passing through the coil q = I1t1= e1rt1= 0.52× 4c =1c;

(2) When it changes uniformly from -0.2T to zero within 4 ~ 5s, the induced electromotive force E2=N△B△t? s = 10×0.2 1× 1×0.5 = 1V；

Within 0 ~ 4 s, the joule heat generated by the coil is q1= e 21rt1= 0.522× 4j = 0.5j.

Within 4 ~ 5s, the Joule heat generated by the coil is Q2 = E22R2 =122×1j = 0.5j. 。

Therefore, the joule heat generated by the coil within 0 ~ 5s is q = q1+Q2 =1j.

So the answer is: 1, 1.