
7.3 滑动变阻器的使用
Authored by Amanda Gu
Physics
9th Grade
Used 8+ times

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6 questions
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1.
FILL IN THE BLANK QUESTION
1 min • 1 pt
滑动变阻器是通过改变接入电路中的________________来改变电阻的器件。
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如图示,当把滑动变阻器接入电路后,滑片P向右滑动时,电路电阻变大,此时与电路相连接的接线柱应是( )
C和D
B和D
A和C
B和A
3.
MULTIPLE SELECT QUESTION
1 min • 1 pt
下列滑动变阻器的四中接法中正确的有___________.
A
B
C
D
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
当滑片P向右滑动时,下列接入电路的滑动变阻器的电阻变小的有_______。
A
B
C
D
5.
DRAW QUESTION
3 mins • Ungraded
下图为观察滑动变阻器作用的实验器材,将所有器件连接起来,要求滑动变阻器滑片P向左滑动,电流表示数变大,灯泡变亮。
Answer explanation
滑动变阻器接AC或AD都可以,
电流表必须正进负出,但大小量程在本题中d都可以
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
如图所示的两个电路中,电源电压相等,闭合开关S,当图甲中滑动变阻器的滑片向左滑动、图乙中的滑片向右滑动时,灯泡L1和L2的亮度变化是 ( )
L1、L2都变暗
L1、L2都变亮
L1变亮,L2变暗
L1变亮,L2的亮度不变
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