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When the temperature of metallic conductor increases, the velocity of free electrons increases but it also cause increase in amplitude of vibration of metallic atoms which cause some extra hindrance or resistance in the path of free electron. Hence resistance increases in investing the temperature whereas the resistance of a semiconductor decreases with increase in temperature and vice versa. Hence, option A is correct.
H-4 hybrid of cotton is cross between
The stage in the communication process, where the receiver relates and interprets the decoded message to what he already knows, is known as
The marginal product of a factor input initially rises with its employment level, but after reaching a certain level of employment, it starts falling. ...
Toxic factor found in flaxseed is
In meloidogyne, the …. stage juveniles enter the roots?
Trichogramma chilonis can be used to control the:
Which of the following is most appropriate for blank “b”?
Bacterial leaf blight of rice is caused by
As per the provisions of MMPO, a person/dairy plant needs to be registered with the registering authority appointed by central government if:
Which one of the following chemical is used for creating high osmoticum for prolonged storage of culture?
