Which of the following device is bidirectional but without a gate? basic electrical mcq pdf, nts electrical, gat subject electrical engineering book pdf, cts electrical mcqs, nts mcqs 2019, electrical engineering past papers, electrical mcqs books, entry test preparation for electrical engineering

Which of the following device is bidirectional but without a gate?

(A) SCR
(B) Triac
(C) Diac
(D) None of the above




Answer:  (A)

A triac is like a, basic electrical mcq pdf, nts electrical, gat subject electrical engineering book pdf, cts electrical mcqs, nts mcqs 2019, electrical engineering past papers, electrical mcqs books, entry test preparation for electrical engineering

A triac is like a

(A) unidirectional SCR
(B) bidirectional SCR
(C) NPN transistor
(D) PNP transistor





Answer:  (B)

Which of the following is not a four layer diode? basic electrical mcq pdf, nts electrical, gat subject electrical engineering book pdf, cts electrical mcqs, nts mcqs 2019, electrical engineering past papers, electrical mcqs books, entry test preparation for electrical engineering

Which of the following is not a four layer diode?

(A) SCR
(B) Triac
(C) Thyristor
(D) Diac





Answer:  (D)

The characteristics of a thyristor closely re-semble to the characteristics of? basic electrical mcq pdf, nts electrical, gat subject electrical engineering book pdf, cts electrical mcqs, nts mcqs 2019, electrical engineering past papers, electrical mcqs books, entry test preparation for electrical engineering

The characteristics of a thyristor closely re-semble to the characteristics of

(A) PN-Junction
(B) constant voltage source
(C) constatnt current source
(D) Thratron gas tube

Answer:  (D)

When a SCR is conducting it has? basic electrical mcq pdf, nts electrical, gat subject electrical engineering book pdf, cts electrical mcqs, nts mcqs 2019, electrical engineering past papers, electrical mcqs books, entry test preparation for electrical engineering

When a SCR is conducting it has

(A) infinitely large resistance
(B) resistance of few mega ohms
(C) low resistance
(D) zero resistance




Answer:  (C)

The conduction in a SCR is controlled by? basic electrical mcq pdf, nts electrical, gat subject electrical engineering book pdf, cts electrical mcqs, nts mcqs 2019, electrical engineering past papers, electrical mcqs books, entry test preparation for electrical engineering

The conduction in a SCR is controlled by

(A) gate
(B) anode
(C) cathode
(D) all of the above





Answer:  (A)

LEDs do not require, basic electrical mcq pdf, nts electrical, gat subject electrical engineering book pdf, cts electrical mcqs, nts mcqs 2019, electrical engineering past papers, electrical mcqs books, entry test preparation for electrical engineering

LEDs do not require

(A) Heating
(B) warm up time
(C) both (A) and (B) above
(D) none of the above

Answer:  (C)

The power consumption of LEDs may be of the order of, basic electrical mcq pdf, nts electrical, gat subject electrical engineering book pdf, cts electrical mcqs, nts mcqs 2019, electrical engineering past papers, electrical mcqs books, entry test preparation for electrical engineering

The power consumption of LEDs may be of the order of

(A) 5 to 10 nano amp
(B) 5 to 10 micro amp
(C) 5 to 10 mili amp
(D) 5 to 10 amperes





Answer:  (C)

LEDs normally work on a voltage of, basic electrical mcq pdf, nts electrical, gat subject electrical engineering book pdf, cts electrical mcqs, nts mcqs 2019, electrical engineering past papers, electrical mcqs books, entry test preparation for electrical engineering

LEDs normally work on a voltage of

(A) 1 to 2 V
(B) 10 TO 20 V
(C) 50 to 60 V
(D) 100 to 250 V



Answer:   (A)

A zener Diode, basic electrical mcq pdf, nts electrical, gat subject electrical engineering book pdf, cts electrical mcqs, nts mcqs 2019, electrical engineering past papers, electrical mcqs books, entry test preparation for electrical engineering

A zener Diode

(A) has a high forward-voltage rating
(B) has a sharp breakdown at low reverse voltage
(C) is useful as an amplifier
(D) has a negative resistance






Answer:  (B)

Which of the following material is used for infra-red LED's, basic electrical mcq pdf, nts electrical, gat subject electrical engineering book pdf, cts electrical mcqs, nts mcqs 2019, electrical engineering past papers, electrical mcqs books, entry test preparation for electrical engineering

Which of the following material is used for infra-red LED's

(A) Gallium arsenide
(B) Gallium phosphide
(C) Silicon
(D) None of the above




Answer:   (A)

Which of the following material finds application in light emitting diodes?, basic electrical mcq pdf, nts electrical, gat subject electrical engineering book pdf, cts electrical mcqs, nts mcqs 2019, electrical engineering past papers, electrical mcqs books, entry test preparation for electrical engineering

Which of the following material finds application in light emitting diodes?

(A) Silicon
(B) Phosphorous
(C) Sulphur
(D) Gallium phosphide




Answer:  (D)

Avalanche breakdown in a semi-conductor diode occurs when, Nts test paper, basic electrical mcq pdf, nts electrical, gat subject electrical engineering book pdf, cts electrical mcqs, nts mcqs 2019, electrical engineering past papers, electrical mcqs books, entry test preparation for electrical engineering

Avalanche breakdown in a semi-conductor diode occurs when

(A) The potential barrier is reduced to zero
(B) forward bias exceeds a certain value
(C) Reverse bias exceeds a certain value
(D) forward current exceeds a certain value





Answer: (C)

Which of the following device has characteristic close to that of an ideal current source? NTS test preparation, pts test solution, nts test paper

Which of the following device has characteristic close to that of an ideal current source?

(A) Gas diode
(B) Crystal diode
(C) Transistor in CB mode




Answer: (C)

Which of the following device has characteristic close to that of an ideal voltage source? NTS test solution, nts test preparation, pts test paper, sts test paper

Which of the following device has characteristic close to that of an ideal voltage source?

(A) Zener Diode
(B) Vacuum diode
(C) Crystal diode
(D) All of the above




Answer: (A)