Tungsten is used in electric bulbs because

Options

A. it is sonorous
B. it has high melting point
C. it has high tensile strength
D. it has high density

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks why tungsten is used in electric bulbs. We need to evaluate the properties of tungsten and determine which one is most relevant to its function in electric bulbs.

2. **Identifying the Options:**
The options provided are:
- A) Sonorous
- B) High melting point
- C) High tensile strength
- D) High density

3. **Analyzing Each Option:**
- **Option A (Sonorous):** Sonorous means that a material produces a deep or ringing sound when struck. While tungsten is a metal and can be sonorous, this property is not relevant to its use in electric bulbs.

- **Option B (High melting point):** Tungsten has a very high melting point of 3422 degrees Celsius. This property is crucial because the filament in an electric bulb needs to withstand high temperatures without melting. When heated, tungsten glows and produces light without melting, making this property very important for its function.

- **Option C (High tensile strength):** This refers to the ability of a material to withstand tension without breaking. While tungsten does have high tensile strength, this property is not the primary reason for its use in electric bulbs.

- **Option D (High density):** Density refers to how much mass is contained in a given volume. Although tungsten is dense, this property does not play a significant role in its function as a filament in electric bulbs.

4. **Conclusion:**
After analyzing all the options, the most relevant property of tungsten that justifies its use in electric bulbs is its high melting point. Therefore, the correct answer is **B) High melting point**.

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