Answer: False
Explanation: The process in which the thickness of a material is reduced with help of two rolls opposing each other it is called as rolling.It is a type of deformation technique that is done on work piece by using compressive forces exerted by rolls working in the opposite direction of reach other. A draft get created in this process which has the difference of initial and final thickness of work piece. Thus, the statement given is false.
Answer:
True
Explanation:
The fundamental steps involved in the operation of a solar cell are as follows:
- Light is incident on the solar cell and this light energy is absorbed by the solar cell.
- The absorbed energy results in the movement of the electron inside the cell which constitutes the electric current in the cell.
- Electric current flows and electricity is produced.
- Hence,in solar cell the light energy is responsible for the only voltage in the cell.
Answer:
Explanation:
a) - Taking enthalpy from the ideal air structure that is :
Given,
Then, we have to apply the equation of the energy rate balance.
After applying that we have:
Then, we have to put values in the equation.
b) - Here, we have to apply the equation of the continuity.
Then, we have to put values in the equation.
Then, the values are :
and,
Then, we have to put values in the equation.
A.Ensure all circuits are de-energized before beginning work
Answer:
Explanation:
Given that:
f = 250 Hz
= 2%
= 600 Hz
= 0.5 to 1.5 increment by 0.05
For 250 Hz = 250 cycle/sec
M = 0.98 , 1.02
At 0.7183 value of damping ratio the error value was 2% at 0.98 value of M
At 0.6330 value of damping ratio the error value was 2% at 1.02 value of M.
Hence, the damping ratio of the transducer must be placed between 0.6330 to 0.7183