若1/R=1/R1+1/R2,则.A:R=R1+R2,B:R=R1+R2/R1+R2,C:R=R1R2/R2+R1,D:R=R1R2/R1-R2求大神帮助/是除号
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/23 16:07:16
若1/R=1/R1+1/R2,则.A:R=R1+R2,B:R=R1+R2/R1+R2,C:R=R1R2/R2+R1,D:R=R1R2/R1-R2求大神帮助/是除号若1/R=1/R1+1/R2,则.A:
若1/R=1/R1+1/R2,则.A:R=R1+R2,B:R=R1+R2/R1+R2,C:R=R1R2/R2+R1,D:R=R1R2/R1-R2求大神帮助/是除号
若1/R=1/R1+1/R2,则.A:R=R1+R2,B:R=R1+R2/R1+R2,C:R=R1R2/R2+R1,D:R=R1R2/R1-R2求大神帮助
/是除号
若1/R=1/R1+1/R2,则.A:R=R1+R2,B:R=R1+R2/R1+R2,C:R=R1R2/R2+R1,D:R=R1R2/R1-R2求大神帮助/是除号
C:R=R1R2/(R2+R1)
本题选择C。因为:1/R=1/R1+1/R2,两边同时乘以R,得:1=R/R1+R/R2,通分,即:1=R(R1+R2)/R1R2,所以,R=R1R2/(R2+R1) ,选C