Calculate the effective resistance seen looking into the primary of a – McqOptions

MCQOPTIONS

1.	Calculate the effective resistance seen looking into the primary of a 20:1 transformer connected to an 8- load.
A.	3.2 k
B.	3.0 k
C.	2.8 k
D.	1.8 k
Answer» B. 3.0 k

Discussion

No Comment Found

Related MCQs

In a class B push-pull amplifier, crossover distortion occurs when both transistors are off and the input signal voltage must exceed V before a transistor conducts.
The highest efficiency is obtained in class B operation when the level of V(p) is equal to ________.
In a class A transformer-coupled amplifier, the ________ the value of V and the ________ the value of V, the ________ the efficiency to (from) the theoretical limit of 50%.
Calculate V.
A silicon power transistor is operated with a heat sink ( = 1.5ºC/W). The transistor, rated at 150 W (25ºC), has = 0.5º C/W, and the mounting insulation has = 0.6 ºC/W. What is the maximum power that can be dissipated if the ambient temperature is 50ºC and T = 200 ºC?
Refer to this figure. The dc voltage on the collector, V, is
In class B operation, at what fraction of V should the level of V(p) be to achieve the maximum power dissipated by the output transistor?
What transformer turns ratio is required to match an 8- speaker load so that the effective load resistance seen at the primary is 12.8 k?
In a class AB amplifier, if the V drops are not matched to the diode drops or if the diodes are not in thermal equilibrium with the transistors, this can result in
Calculate the effective resistance seen looking into the primary of a 20:1 transformer connected to an 8- load.