A high-input-impedance amplifier has following parameters (Total effective load resistance = 2M , Temperature = 300 K). Find the mean square thermal noise current per unit bandwidth for the high-impedance configuration.

A high-input-impedance amplifier has following parameters (Total effec

1.	A high-input-impedance amplifier has following parameters (Total effective load resistance = 2M , Temperature = 300 K). Find the mean square thermal noise current per unit bandwidth for the high-impedance configuration.
A.	8.9 10<sup>-27</sup>A<sup>2</sup>/Hz
B.	8.12 10<sup>-27</sup>A<sup>2</sup>/Hz
C.	8.29 10<sup>-27</sup>A<sup>2</sup>/Hz
D.	8.4 10<sup>-27</sup>A<sup>2</sup>/Hz
Answer» D. 8.4 10<sup>-27</sup>A<sup>2</sup>/Hz