<u></u> has greater effect.
 has greater effect.
<u>Explanation</u>:

 = Temperature of cold reservoir
 = Temperature of cold reservoir
 = Temperature of hot reservoir
 = Temperature of hot reservoir
when  is decreased by 't',
 is decreased by 't',
 =
 = 
 
      
when  is increased by 'T'
 is increased by 'T'


 
        
             
        
        
        
Explanation:
The wind is an actual form of solar energy. winds are caused by the heating of the atmosphere by the sun, the rotation of the earth, and the earth's surface irregularities. The wind is capture in a wind turbine which provides a renewable energy source, the wind makes the rotor spin, as the rotor spins the movement of the blades drives a generator that creates energy, also known as wind power. The average wind efficiency of turbines is between 35-45%.
Advantages of wind power 
- Wind power is cost-effective 
- wind creates jobs 
- wind enables US industry growth and US competitiveness 
-it's a clean fuel source
     
 
        
             
        
        
        
Answer:
a) Under damped
Explanation:
Given that system is critically damped .And we have to find out the condition when gain is increased.
As we know that damping ratio given as follows

Where C is the damping coefficient and Cc is the critical damping coefficient.

So from above we can say that


From above relationship we can say when gain (K) is increases then system will become under damped system.