Question

What happens to the corona effect if the spacing between conductors is increased?

• A. Corona increases
• B. Corona decreases
• C. Corona is absent
• D. No effect

Hint:

Increasing conductor spacing reduces electric stress and hence reduces corona effect.

Answer 1

The Correct Option is B

Concept: Corona occurs when the electric field intensity around a conductor exceeds the breakdown strength of air.

Step 1: Corona depends on conductor spacing, conductor radius, voltage, and atmospheric conditions.

Step 2: If conductor spacing is small, the electric field intensity near the conductors becomes higher.

Step 3: If spacing between conductors is increased, the electric field intensity is reduced.

Step 4: Due to reduced electric stress, ionization of air decreases.

Step 5: Therefore, corona effect decreases. Hence: \[ \boxed{\text{Corona decreases}} \]