您所在的当前位置：初中物理试题 >

电路的组成

> 某电路中的电流大约为0.4A，一同学要准确测量这个电流值，他选用的电流表有两个量程：0 ~ 0.6 A和0 ~ 3 A。他选用了0 ~ 3 A的量程来测量，则他的测量结果是 A.测不出电路中的电流值 B.电流表的指针可能被打弯 C.电流表可能被烧坏 D.测量的电流值精确程度差一些

问题：

发布时间：2024-09-08

某电路中的电流大约为0.4A，一同学要准确测量这个电流值，他选用的电流表有两个量程：0 ~ 0.6 A和0 ~ 3 A。他选用了0 ~ 3 A的量程来测量，则他的测量结果是

A.测不出电路中的电流值
B.电流表的指针可能被打弯
C.电流表可能被烧坏
D.测量的电流值精确程度差一些

参考答案：

提问用户：Po***yBI

可能感兴趣的题目：

1 下列属于互补商品的是（） A．牛肉与猪肉 B．汽车与火车 C．汽车与汽油 D．电话与电灯
2 听下面一段材料，回答第1-3题。 1. What is the man dissatisfied with? A. The price of the goods. B. The quality of the goods. C. The delivery of the goods. 2. How does the man want to have the goods delivered? A. By sea. B. By air C. By train. 3. What can we learn from the conversation? A. The man ’s company will pay the extra delivery costs. B. The speakers will sign the contract at once. C. The woman will give the man a discount.
3 （24分）现代海洋经济包括为开发海洋资源和依赖海洋空间而进行的生产活动，以及直接或间接为开发海洋资源及空间的相关服务性产业活动。阅读材料，回答问题。材料一随着陆地资源逐步紧缺，人类活动进一步向海洋延伸，海洋经济地位加速提升。总体来看，海洋生产总值每增加1元，带来同期国内生产总值相应增加约10元，这是海洋经济对国民经济的长期影响。表一：近五年来我国海洋生产总值情况（单位：亿元）表二：近五年我国国内生产总值和海洋生产总值增长率对比注：与发达国家相比，美日英三国海洋经济绝对值分别是我国的14、13和5倍。其海洋产值占GDP的比重平均高出我国0．2—1．8个百分点。（1）图表（含注）反映了什么经济信息？（4分）发展海洋经济有何经济意义？（6分）
4 For the people living in the Nile Basin, the river is their life．This 6,825 km waterway, whose watershed（流域）covers three million square kilometers, flows through mountains ,woodlands, lakes and deserts．Its potential for fishing, tourism and shipping is great—but so are its challenges. Water shortage , already serious in Egypt and Sudan , will soon influence several other countries in the watershed as well．Today, about 160 million people depend on the Nile River for their living．Within the next 25 yeas ,the district"s population is expected to double, adding to the demand brought about by growth in industry and agriculture．The frequent drought（干旱）adds to the urgency. Water quality is also a problem．Precious soil is washed out to sea．Wastes from industry and agriculture create pollution．Higher concentrations of salt influence irrigated soils．Water-borne diseases continue unchecked．In areas where it"s hot and damp, water hyacinths choke off（阻止） lakes, dams and other sections of the river, making it difficult for fishing and other businesses to move forward. Native people along the narrow area of farmland have watched the sand move closer day by day．They’ve seen the river change course, and their only source（来源） of water thickened with mud．They’re very poor and have few choices. But a new program, the Nile Basin Initiative (NBI), is offering very practical assistance．The program is more than just a water-management project．It’s a plan for the social and economic development of a vast district: it concentrates on the needs of the poorest of the poor and the environment that supports them. These are whole ecosystem problems, calling for united solutions．Half the Nile Basin"s countries are among the world"s poorest nations；yet, somehow, they must find the resources, skills and political will to overcome these challenges. 小题1:What are the great challenges the Nile Basin faces？ A．The development of shipping industry. B．Over fishing of native people. C．Water shortage and water quality. D．Increasing population and tourism. 小题2:The underlined word “hyacinths” （in Paragraph 3） refer to “ ”. A．plants B．animals C．rocks D．salts 小题3:The program NBI is mainly aimed at . A．preventing water pollution B．improving living condition of the poor C．changing the river course D．preventing land from becoming desert 小题4: A．People’s Life in Egypt and Sudan B．Frequent Drought in Egypt and Sudan C．The Poorest Countries in the Nile Basin D．The Ecosystem Problems in the Nile Basin
5 如图所示，质量均为m的物体A，B通过一劲度系数为k的轻弹簧相连，开始时B放在地面上，A，B都处于静止状态。现用手通过细绳缓慢地将A向上提升距离L 1时，B刚要离开地面，此过程手做功W 1、手做功的平均功率为P 1；若将A加速向上拉起，A上升的距离为L 2时，B刚要离开地面，此过程手做功W 2、手做功的平均功率为P 1。假设弹簧一直在弹性限度范围内，则 [ ] A．L 1=L 2= B．L 2>L 1= C．W 2>W 1 D． P2＜P 1
6 如图11-2-15所示，在倾角为30 0的斜面上，放置两条宽L=0.5m的平行导轨，将电源、滑动变阻器用导线连接在导轨上，在导轨上横放一根质量m=0.2kg的金属杆ab，电源电动势E=12V，内阻r=0．3Ω，金属杆与导轨间最大静摩擦力为fm=0.6N，磁场方向垂直轨道所在平面，B=0.8T．金属杆ab的电阻为0.2Ω，导轨电阻不计．欲使杆的轨道上保持静止，滑动变阻器的使用电阻的范围多大?(g取10m／s 2)
7 世界上最大的半岛位于 A.东亚 B.中东 C.东南亚 D.西欧
8 The children have been playing with my hat they"ve knocked it out of ______. A．date B．shape C．order D．balance
9 关于氢键，下列说法正确的是 [ ] A．每一个水分子内含有两个氢键 B．冰、水和水蒸气中都存在氢键 C．DNA中的碱基互补配对是通过氢键来实现的 D．H 2O是一种非常稳定的化合物，这是由于氢键所致
10 下列反应的离子方程式书写正确的是 [ ] A．向澄清石灰水中滴入盐酸：Ca(OH) 2+2H +===Ca 2++2H 2O B．用小苏打治疗胃酸过多：HCO 3 -+H +===CO 2↑+H 2O C．实验室用石灰石和盐酸反应制取CO 2 ：CO 3 2-+2H +===CO 2↑+H 2O D．Ba(OH) 2与H 2SO 4反应：H ++OH -===H 2O