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Physics CBSE Live product
Class 7 (2025-26)
Electricity: Circuits and their components
Revision III - Electricity: Circuits and their components
8.
Basic electrical components
Question:
3
m.
Give the definition of the following:
1
.
Electric cell
A device that stores mechanical energy and supplies it through a single terminal
A portable source of electrical energy having two terminals that help in proper connection in a circuit
A fixed source of electrical energy having only one terminal for connection in a circuit
A portable source of electrical energy having three terminals for better connection in a circuit
2
.
Positive terminal
The raised metal cap forms the positive terminal, and the flat metal disc acts as the negative terminal
The raised metal cap forms the negative terminal, and the flat metal disc forms the positive terminal
Both the raised metal cap and flat metal disc form positive terminals
The flat metal disc forms the positive terminal, and the raised metal cap forms the negative terminal
3
.
LED
It emits light with the help of a thick metal filament inside it
It produces light using a thin filament that glows when heated
It produces light only when both terminals are connected in any direction
It produces light without using a filament
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