For protecting a sensitive equipment from theexternal electric arc, it should be [1998]a)wrapped with insulation around it when acurrent is passing through itb)placed inside an iron canc)surrounded with fine copper sheetd)placed inside an aluminium canCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

For protecting sensitive equipment from external magnetic field, it must be placed inside a can made from ferromagnetic substance because there are no magnetic lines of force inside it.

•Iron is a ferromagnetic substance hence, it is used to keep the sensitive equipment.

Answer

Answer:

Introduction:
Sensitive equipment can be easily damaged by external electric arcs. Therefore, it is necessary to protect such equipment from these arcs to ensure their proper functioning and longevity.

Explanation:
To protect a sensitive equipment from external electric arcs, it should be placed inside an iron can. This method provides a physical barrier between the equipment and the external environment, preventing the electric arc from directly reaching the equipment.

Reasons for choosing an iron can:
1. Electrical conductivity: Iron is a good conductor of electricity. When an electric arc is generated outside the can, the iron can quickly dissipate the electrical energy, preventing it from reaching the sensitive equipment inside.

2. Physical strength: Iron cans are robust and can withstand the impact of an external electric arc, thereby protecting the equipment inside from any physical damage.

3. Heat resistance: Electric arcs generate intense heat. The iron can is capable of withstanding high temperatures without deforming or melting, ensuring that the equipment inside remains unaffected by the heat generated by the arc.

4. Shielding: Iron has magnetic properties, which can act as a shield against electromagnetic interference (EMI). This shielding prevents the sensitive equipment from being affected by any electromagnetic waves generated by the electric arc.

5. Durability: Iron cans are highly durable and resistant to corrosion. They can withstand harsh environmental conditions and provide long-term protection to the sensitive equipment.

6. Ease of installation: Iron cans can be easily installed around the equipment, providing a simple and effective solution for protecting it from external electric arcs.

Conclusion:
Placing a sensitive equipment inside an iron can is the most suitable option for protecting it from external electric arcs. The electrical conductivity, physical strength, heat resistance, shielding properties, durability, and ease of installation make iron cans an ideal choice for ensuring the safety and proper functioning of sensitive equipment.

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