2012年人教版高中物理选修2-1 1.4闭合电路的欧姆定律练习卷（带解析）

1.

如图所示电路，闭合开关S，两个灯泡都不亮，电流表指针几乎不动，而电压表指针有明显偏转，该电路的故障可能是( )

A．电流表坏了或未接好

B．从点a经过灯L₁到点b的电路中有断路

C．灯L₂的灯丝断了或灯座未接通

D．电流表和灯L₁、L₂都坏了

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2.

如图所示，电源电动势E＝10 V，内阻r＝0.2 Ω，标有“8 V,16 W”的灯泡L恰好正常发光，电动机线圈电阻R₀＝0.15 Ω，则电源的输出功率为(　　)

A．16 W	B．440 W
C．80 W	D．400 W

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3. If we want to have a {#blank#}1{#/blank#} (healthy/health) body, we should exercise a lot and eat healthily.

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4. If we want to have a {#blank#}1{#/blank#} (healthy/health) body, we should exercise a lot and eat healthily.

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5. If we want to have a {#blank#}1{#/blank#} (healthy/health) body, we should exercise a lot and eat healthily.

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6.

根据短文内容判断下列句子正误。

B

One day, a little boy met an old millionaire and said. “I think I'm much richer than you.” The old man was greatly surprised and asked, “Why, my child?"

“Do you know, time is money?” The boy asked.

“Of course I do, but does it mean you are richer than me?”

"Why not?" said the boy, “Now you see, I'm only ten years old and you are already seventy. If we both can live to 100, I still have 90 years to 90, while you have only 30 years. Time is money. Don't you agree I'm much richer than you?”

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7.

根据短文内容判断下列句子正误。

B

One day, a little boy met an old millionaire and said. “I think I'm much richer than you.” The old man was greatly surprised and asked, “Why, my child?"

“Do you know, time is money?” The boy asked.

“Of course I do, but does it mean you are richer than me?”

"Why not?" said the boy, “Now you see, I'm only ten years old and you are already seventy. If we both can live to 100, I still have 90 years to 90, while you have only 30 years. Time is money. Don't you agree I'm much richer than you?”

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8.

根据短文内容判断下列句子正误。

B

One day, a little boy met an old millionaire and said. “I think I'm much richer than you.” The old man was greatly surprised and asked, “Why, my child?"

“Do you know, time is money?” The boy asked.

“Of course I do, but does it mean you are richer than me?”

"Why not?" said the boy, “Now you see, I'm only ten years old and you are already seventy. If we both can live to 100, I still have 90 years to 90, while you have only 30 years. Time is money. Don't you agree I'm much richer than you?”

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9.

关于闭合电路，下列说法正确的是(　　)

A．电源短路时，放电电流为无限大

B．电源短路时，内电压等于电源电动势

C．用电器增加时，路端电压一定增大

D．把电压表直接和电源连接时，电压表的示数总小于电源电动势

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10.

如图所示，电路中接一电动势为4V、内阻为2Ω的直流电源，电阻R₁、R₂、R₃、R₄的阻值均为4Ω，电容器的电容为30μF，电流表的内阻不计，当电路稳定后，求：

（1）电流表的读数
（2）电容器所带的电荷量
（3）如果断开电源，通过R₂的电荷量

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2012年人教版高中物理选修2-1 1.4闭合电路的欧姆定律练习卷（带解析）

1.单选题(共2题)

2.选择题(共6题)

3.多选题(共1题)

4.解答题(共1题)

【1】题量占比

【2】：难度分析