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In self cooled motors the cooling time constant is about ______ than the heating time constant because cooling conditions are worse at standstill.
In self cooled motors the cooling time constant is about ______ than the heating time constant because cooling conditions are worse at standstill.
(a) 2 to 3 times greater
(b) 3 to 4 times greater
(c) 4 to 5 times greater
(d) none of the above
Ans: a
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