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Physics CBSE Live product
Class 8 (2026-27)
Electricity: Magnetic and Heating Effect
PT1 Revision - Electricity: Magnetic and Heating Effect
3.
Electromagnet and factors affecting its strength
Question:
2
m.
Fill in the blanks:
1
.
Inserting a
soft iron core decreases
soft iron core increases
broken iron core increases
hard iron core decreases
the strength of the electromagnet.
2
.
The strength of an electromagnet
increases when the number of switches
increases when the number of cells
increases when the number of magnets
decreases when the number of cells
is increased.
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