简答题: <br /> <img src="http://www.weimei168.com/uploads/202208/20130108163917231723.jpg" alt="" border="0" /><br /> <img src="http://www.weimei168.com/uploads/202208/20130108163937223722.jpg" alt="" border="0" /><br /> 电流的功率和电路的热功率各多大?<br /> <img src="http://www.weimei168.com/uploads/202208/20130108163915421542.jpg" alt="" border="0" /><br />