1.

The resistance of hot tungsten filament is about 10 times the cold resistance. What will be the resistance of 100 W and 200 V lamp when not in use                                      [AIEEE 2005]

A.            \[400\,\Omega \]               
B.            \[200\,\Omega \]
C.            \[40\text{ }\Omega \]      
D.            \[20\,\Omega \]
Answer» D.            \[20\,\Omega \]


Discussion

No Comment Found

Related MCQs