If a D.C. motor designed for 40°C ambient temperature is to be used for 50°C ambient temperature, then the motor

Of lower H.P. should be selected

Of higher H.P. should be selected

Can be used for 50°C ambient temperature also

Is to be de-rated by a factor recommended by manufacturer and select the next higher H.P. motor

If a D.C. motor designed for 40°C ambient temperature is to be used

1.	If a D.C. motor designed for 40°C ambient temperature is to be used for 50°C ambient temperature, then the motor
A.	Of lower H.P. should be selected
B.	Of higher H.P. should be selected
C.	Can be used for 50°C ambient temperature also
D.	Is to be de-rated by a factor recommended by manufacturer and select the next higher H.P. motor
Answer» E.