Explain how point discharge occurs.
- Leaving Cert Physics - Question (e) - 2017
Question (e)
Explain how point discharge occurs.
Worked Solution & Example Answer:Explain how point discharge occurs.
- Leaving Cert Physics - Question (e) - 2017
Step 1
Charge accumulates at a point
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Point discharge occurs when electric charge accumulates at a sharp point or edge of a conductor. This accumulation creates a strong electric field around the point due to the concentration of charge, leading to an increased likelihood of discharge.
Step 2
Air is ionised around the point
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
As the electric field becomes sufficiently strong, it ionises the surrounding air. This ionisation process allows the air molecules to become charged, which facilitates the movement of electrons, creating a pathway for current flow.
Step 3
Like charges are repelled
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
When the accumulated charge at the point becomes too high, like charges repel each other. This repulsion causes some of the charges to leave the point, contributing to the discharge.
Step 4
Unlike charges are attracted
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Simultaneously, the ionised air around the point produces a pathway toward nearby oppositely charged areas. The attraction of unlike charges enhances the discharge process, allowing the electric current to flow rapidly away from the point.
Join the Leaving Cert students using SimpleStudy...
