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Physics CBSE Live product
Class 7 (2025-26)
Electricity: Circuits and their components
Revision I - Electricity: Circuits and their components
9.
Electrical components
Question:
5
m.
Choose the correct answer:
1.
Filament
-
A thick wire inside the glass bulb of an incandescent lamp that heats up and emits light when electric current flows through it
A thin wire inside the glass bulb of an incandescent lamp that heats up and emits light when electric current flows through it
A thin wire inside the glass bulb of an incandescent lamp that does not heat up and emits light when electric current flows through it
A thin wire inside the glass bulb of an incandescent lamp that does not heat up and does not emit light when electric current flows through it
2.
Battery
-
When two or more electric cells are connected such that the positive terminal of one cell is joined to the negative terminal of the next
When two or more electric cells are connected such that the negative terminal of one cell is joined to the negative terminal of the next
When only one electric cell is connected such that the positive terminal of one cell is joined to the negative terminal of the next
When two or more electric cells are connected such that the positive terminal of one cell is joined to the positive terminal of the next
3.
LED
-
It has a filament and has two terminals with fixed polarity: longer wire for positive terminal, shorter wire for negative terminal
It does not have a filament and has two terminals with fixed polarity: longer wire for negative terminal, shorter wire for positive terminal
It does not have a filament and has two terminals with fixed polarity: longer wire for positive terminal, shorter wire for negative terminal
It does not have a filament and has two terminals with unfixed polarity: both positive and negative terminal
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