
滑动变阻器

Quiz
•
Physics
•
9th Grade
•
Hard

Zhao Liang
Used 2+ times
FREE Resource
7 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
如图所示,当滑动变阻器的滑片P向左移动时,能使滑动变阻器连入电路中的电阻变小的接法是( )
A
B
C
D
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
如图所示是未连接完整的电路,若要求闭合开关后,滑动变阻器的滑片P向左移动时,灯泡变亮,则下列接法符合要求的是
M接A,N接D
M接B,N接C
M接A,N接B
M接C,N接D
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
将两个滑动变阻器按如图所示的方法连接,如果把a、b两根导线接入电路中,要使这两个变阻器接入电路中的总电阻最大,滑片P1、P2的放置方式分别是 ( )
P1放在最右端,P2放在最右端
P1放在最左端,P2放在最左端
P1放在最右端,P2放在最左端
P1放在最左端,P2放在最右端
4.
FILL IN THE BLANK QUESTION
1 min • 1 pt
打开阀门A,油面下降,滑片向___移动,油量表示数变____
5.
FILL IN THE BLANK QUESTION
1 min • 1 pt
打开阀门B,油面上升,滑片向___移动,油量表示数变____
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列说法中不正确的是
滑动变阻器在一定范围内可以连续改变连入电路的阻值,但不能读出阻值
电阻箱不可以连续地改变连入电路的阻值,但可以读出阻值
要使变阻器能改变通过用电器的电流,可以将它与被控制用电器串联
滑动变阻器的接线柱不分正、负,因而无论怎样接入电路,效果都完全一样
7.
FILL IN THE BLANK QUESTION
1 min • 1 pt
滑动变阻器是靠改变接入电路中____________
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