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CBSE Class 11-science Answered

When plug is pulled ,then a spark is shown why
Asked by srinprasad143 | 21 Jan, 2020, 02:26: AM
answered-by-expert Expert Answer
Breakdown voltage of air at atmospheric pressure is 3 × 106 V / m  .
 
Hence in an air gap of 0.1 mm , 300 V is breakdown voltage , i.e air is ionised and arching takes place if two conductors placed
with air gap 0.1 mm and potential difference between conductors is 300 V.
 
When we remove the plug from electrical point that has electrical potential 270 V,  above condition occurs  
for fraction of millisecond between the metal of plug tip and metal of electrical point .
 
Hence arching is taking place when we plug is pulled out from electrical power  point
Answered by Thiyagarajan K | 21 Jan, 2020, 08:22: AM
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