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Subjects
Science CBSE
Class 7
Electric current and its effects
Circuits, heating and magnetic effects
12.
Magnetic effect and electromagnets
Exercise condition:
2
m.
Choose
the correct answer
:
1
.
There is no current flow in the given circuit because
The compass is at rest
The circuit is closed
The circuit is open
2
.
This simple experiment is the basis of these devices.
Ceramics
Electric bell
Plastics
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