Question

In electric apparatus 'earth' is used:

  1. to reduce the expenditure
  2. because the apparatus used 3-phase
  3. for safety
  4. in the form of fuse

Answer:

Option C: for safety

Detailed Solution:

The correct answer is “for safety”.

In electrical appliances, "earth" refers to grounding or earthing. The main purpose of earthing is to provides a path for leakage current to flow safely to the ground in case of a fault or malfunction.

This prevents the appliance's body from becoming charged and potentially causing electric shock.