Question

What is the use of a fuse in domestic electric circuits? How is its role different from the role of a green coloured wire given in domestic electric circuits? What will happen if an electrician installs a fuse with higher-rated value than prescribed for a given electric circuit?

Accepted Answer

0. - **Role of Fuse:** Protects electrical appliances and wiring from overloading/short circuits by melting and breaking the circuit when current exceeds safe limit. - **Difference from Earth Wire (Green):** Earth wire provides a low-resistance conducting path to ground to prevent electric shock from metallic body leakages; fuse breaks the live circuit during overcurrent. - **Higher-rated Fuse Effect:** The fuse will not melt during current overload, leading to potential damage to appliances or electrical fires due to overheating.

Electric Fuse and Earthing

Explanation

Practise this under board exam conditions