07 August 2022

Circuit Theory

Which of the following is NOT true regarding passive electronic components?

a) Passive components cannot control the flow of electric current through a circuit but can limit the flow of electric current.

b)  Passive components do not depend upon the external source of energy or voltage to perform a specific operation.

c) Passive components temporarily store the electrical energy in the form of static electric field or magnetic field.

d) Passive components can amplify or increase the power of electrical signal.

Correct Answer: Option D

Solution:
Passive components
1) cannot provide power gain or amplification $$P_{out} \leq P_{in}$$
2) it disspates power $$\int_{-inf}^t v(t)\; i(t)\; dt\;=\;+ve$$
3) It can store energy in the form of electric field or magnetic field for finite period of time only. (i.e) it cannot supply power for infinite period of time.
4) They do not need any external power source to perform its work.
5) It cannot control the current flow by means of another electrical signal.

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