Ramesh wants to choose a materials for the making filaments of a bulb. The chosen material should posses which of the following properties?
(i) Low melting point
(ii) Ability to glow at high temperature
(iii) High resistance

Correct option is D

The Correct Answer is (d) Both (ii) and (iii)
Explanation: For the filament of a bulb, the chosen material should have the following properties:
1. Ability to Glow at High Temperature : The filament must emit light when heated to high temperatures. Materials like tungsten are used because they can sustain extremely high temperatures without degrading, enabling them to produce visible light.
2. High Resistance : High resistance is necessary to convert electrical energy efficiently into heat and light. This property ensures that the filament heats up quickly when an electric current passes through it.
3. High Melting Point (not Low): The filament material must have a high melting point, not a low one, to prevent melting or breaking under the intense heat. For example, tungsten has a melting point of about 3422°C.
Key Points:
· Ability to Glow at High Temperature: Essential for visible light production.
·  High Resistance: Necessary for efficient energy-to-light conversion.