Radio Receivers - Engineering

Q1:

An unmodulated voltage 10 V effective is applied to a dioxide detector in which load resistance is 4 x 10-5 ohms. A micrometer shows that the rectified DC current in this resistance is 30 A. The input resistance of the detector is

A 114 kW

B 336 kW

C 384 kW

D 455 kW

ANS:B - 336 kW

The formula is P = (squareroot(2) *1 0)/4 * 10^-5.