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Subjects
Science CBSE
Class 7
Electric current and its effects
Circuits, heating and magnetic effects
14.
Magnetic effect in electromagnets
Exercise condition:
5
m.
Select the right answer from the given options
:
1
.
MCB
ISI
CFL
is a smart eco-friendly bulb.
2
.
Fluorescent tube-lights contains a toxic
hydrogen vapour
nitrogen vapour
mercury vapour
.
3
.
The filament glows at
low
medium
high
temperature.
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