【简答题】JC 1 .17 求题 1.17 图所示电路中的电压 U 和电流 I ,并求受控电源吸收的功率。
【简答题】(哈尔滨工业大学2006年考研试题)在图17—6所示非线性动态电路中,非线性电阻的电压、电流关系为u1=i12—4i1(单位:V,A;i1>0),非线性电容q=10-3uc2(单位:c,V),电压源us(t)=15+ε(t)V。用小信号分析法求响应uc(t)。
【单选题】( )is used to measure the product of the power supplied to the antenna and the antenna gain in a given direction relative to an isotropic antenna.
【简答题】生石灰是白色的块状物,应用非常广泛. (1)生石灰的主要成分为(填化学式)______.在食品包装中,常用生石灰作干燥剂,其干燥原理是(用化学方程式表示)______. (2)石灰乳常用于畜禽栏舍的消毒,某农户误将生石灰直接撤在中消毒,一段时间后发现猪的蹄部干燥开裂,有的甚至出现灼伤、溃疡,原因是______. (3)上述用于消毒的石灰乳要现配现用,放置过久就没有消毒作用了,其原因是(用化学方...
【判断题】If the buyer is not price sensitive and uneducated,and the supplier’s product is highly differentiated, the supplier power is high.
【简答题】Translation 2. The power absorbed or supplied by a circuit element is the product of the voltage across the element and the current through it.
【简答题】Electric power is the mathematical product of twoquantities: current and ________.A. power B. voltage
【单选题】Supplier power is ________ if the buyer is not price sensitive and uneducated regarding the product. If the supplier’s product is highly differentiated, then supplier bargaining power is ________.
【简答题】Electric power is the mathematical product of twoquantities: current and ________.