试题与答案

(10分)如图所示的电路中,R1是由某金属氧化物制成的导体棒,实验证明通过它的电

题型:计算题

题目:

(10分)如图所示的电路中,R1是由某金属氧化物制成的导体棒,实验证明通过它的电流I和它两端电压U遵循I=kU3的规律(式中k=0.02 A/V3),R2是普通电阻,阻值为24 Ω,遵循欧姆定律,电源电动势E=6 V,闭合开关 S后,电流表的示数为0.16 A.求:

(1)R1两端的电压;

(2)电源的内电阻r;

(3)R1、R2和r消耗的电功率P1、P2和Pr.

答案:

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参考答案:B

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