Consider the following materials :
Copper, Tungsten, Chromium, Aluminium, Nichrome, Iron
Which of these is used to make :
filament of an electric bulb ?

Answer

To determine which material is used to make the filament of an electric bulb from the given options (Copper, Tungsten, Chromium, Aluminium, Nichrome, Iron), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Purpose of the Filament**:
The filament in an electric bulb needs to produce light when electricity passes through it. This requires a material that can withstand high temperatures without melting.

2. **Evaluate the Properties of Each Material**:
- **Copper**: Good conductor of electricity but has a low melting point, making it unsuitable for filaments.
- **Tungsten**: Known for its very high melting point and high resistance. This makes it ideal for use in filaments.
- **Chromium**: While it has some resistance, it is not typically used for filaments.
- **Aluminium**: Good conductor but has a lower melting point than tungsten.
- **Nichrome**: Used in heating elements but not typically in light bulb filaments.
- **Iron**: Has a lower melting point compared to tungsten and is not suitable for high-temperature applications like filaments.

3. **Identify the Best Candidate**:
Among all the materials listed, **Tungsten** stands out due to its high melting point and high resistance, which allows it to glow brightly without melting when electricity passes through it.

4. **Conclusion**:
The material used to make the filament of an electric bulb is **Tungsten**.

### Final Answer:
**Tungsten** is used to make the filament of an electric bulb.