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Science CBSE Homework Assignments
Class 7
Electric current and its effects
Electromagnets
2.
Magnetic effect in electromagnets
Task:
5
m.
Select the right answer from the given options
:
1
.
LED
MCB
CFL
bulbs are more efficient than any other bulbs.
2
.
Wear and tear of insulation on the wires causes a
electricity
short circuit
overload
.
3
.
The heat in the element depends on the
temperature
thickness
colour
of the coil.
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