2018 2017 1.B 2.A 3.A 4.C 5.B 6.C 7.D 8.D 9.BD 10.AD 5 J 12. 13. 14.20 0.35 15.15V 5V 10V 16. 2 1 1 20. x 21. 7 J/m 3 8 J/m 3 Q =vq Q =0.01m 3 8 J/m 3 6 J =90% Q 7 6 J=6 6 J Q cm Q = kg kg J J 100 ) /( 10 2 . 4 10 3 . 6 3 6 22. I=0.5A I1=0.3A 1 R2 I=I1+I2 U=U1=U2 2=I I1 0.5A 0.3A 0.2A I= R U U1=I1 1 U1=6V U=U1=U2 U2=U=6V I= R U R2= 2 2 I U = A V 2 . 0 6
