Electronic Devices and Circuits MCQ Questions and answers

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Q. Which of the power amplifiers is not intended primarily for large- signal or power amplification?

(A) class a
(B) class b or ab
(C) class c
(D) class d

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Q. Determine what maximum dissipation will be allowed for a 70-W silicon transistor (rated at 25ºC) if derating is required above 25ºC by a derating factor of 0.6 W/ºC at a case temperature of 100º.

(A) 25 w
(B) 30 w
(C) 35 w
(D) 40 w

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Q. A silicon power transistor is operated with a heat sink (θSA = 1.5ºC/W). The transistor, rated at 150 W (25ºC), has θJC = 0.5º C/W, and the mounting insulation has θCS = 0.6 ºC/W. What is the maximum power that can be dissipated if the ambient temperature is 50ºC and TJmax = 200 ºC?

(A) 61.5 w
(B) 60.0 w
(C) 57.7 w
(D) 55.5 w

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Q. Which of the following transistors has been quite popular as the driver device for class D amplification?

(A) bjt
(B) fet
(C) ujt
(D) mosfet

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Q. The algebraic sum of in a network of conductors meeting at a point is zero.

(A) voltages
(B) currents
(C) resistances
(D) inductances

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Q. The theorem is a way to determine the currents and voltages present in a circuit that has multiple sources.

(A) norton
(B) super position
(C) thevenin
(D) maximum power transfer

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Q. The concept on which Superposition theorem is based is

(A) reciprocity
(B) duality
(C) non-linearity
(D) linearity

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Q. Kirchhoff’s current law is applicable to only

(A) junction in a network
(B) closed loops in a network
(C) electric circuits
(D) electronic circuits

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Q. Superposition theorem can be applied only to circuits having

(A) resistive elements
(B) passive elements
(C) non-linear elements
(D) linear bilateral elements

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Q. The concept on which superposition theorem is based on

(A) reciprocity
(B) duality
(C) non-linearity
(D) linearity

Electronic Devices and Circuits MCQs with answers Page - 5

Q. Which of the power amplifiers is not intended primarily for large- signal or power amplification?

Q. Determine what maximum dissipation will be allowed for a 70-W silicon transistor (rated at 25ºC) if derating is required above 25ºC by a derating factor of 0.6 W/ºC at a case temperature of 100º.

Q. A silicon power transistor is operated with a heat sink (θSA = 1.5ºC/W). The transistor, rated at 150 W (25ºC), has θJC = 0.5º C/W, and the mounting insulation has θCS = 0.6 ºC/W. What is the maximum power that can be dissipated if the ambient temperature is 50ºC and TJmax = 200 ºC?

Q. Which of the following transistors has been quite popular as the driver device for class D amplification?

Q. The algebraic sum of in a network of conductors meeting at a point is zero.

Q. The theorem is a way to determine the currents and voltages present in a circuit that has multiple sources.

Q. The concept on which Superposition theorem is based is

Q. Kirchhoff’s current law is applicable to only

Q. Superposition theorem can be applied only to circuits having

Q. The concept on which superposition theorem is based on

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