问题
问答题
内阻RV＝4kΩ的电压表和内阻RA＝125Ω的电流表，如图1连接时，示数分别为3.2V和1.6mA．如图2连接时，示数分别为3.35V和0.812mA．若把电阻R直接接到电源上，则它所消耗的电功率为多少？
答案
4mW
搜题请搜索小程序“爱下问搜题”
内阻RV＝4kΩ的电压表和内阻RA＝125Ω的电流表，如图1连接时，示数分别为3.2V和1.6mA．如图2连接时，示数分别为3.35V和0.812mA．若把电阻R直接接到电源上，则它所消耗的电功率为多少？
4mW
| 选用合适的情态动词填空 | |
2. Put on warm clothes. You _____ feel cold later on. 3. I missed the bus, so I ______ take a taxi. 4. I think children ______ really learn to respect their elders. 5. —Let's go to the concert together. —Sorry, I _____. I _____ go to a meeting 6. Children _____ play near the street. It's dangerous. 7. —Must I return the book tomorrow morning? —No, you _____. You _____ keep it for three days. 8. —May I try on the jeans? —Yes, you _____. |
