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Question
The total number of leads in reverse conducting thyristor is
Options
A. 2
B. 3
C. 1
D. 4
Correct Answer
3
Explanation
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More questions
1. Which mode is called dominant mode in rectangular wave guide?
Options
A. TE
01
B. TE
11
C. TE
10
D. TE
20
Show Answer
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Correct Answer: TE
10
2. A 3 phase fully controlled converter is a
Options
A. 3 pulse converter
B. 6 pulse converter
C. 2 pulse converter
D. 12 pulse converter
Show Answer
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Discuss
Correct Answer: 6 pulse converter
3. In a single phase half wave converter feeding resistive load and full wave converter (M - 2 connection) feeding a resistive load the circuit conditions are similar. The firing angle is
a
. Then the waveshapes of voltages across thyristors
Options
A. are similar
B. are not similar
C. may be similar or dissimilar
D. are similar only for some values of
a
Show Answer
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Correct Answer: are similar
4. Some types of traps used in video IF amplifier of colour TV are
Options
A. shunt traps
B. series traps
C. absorption traps
D. all of the above
Show Answer
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Correct Answer: all of the above
Explanation:
All these are used.
5. Which of the following devices exhibit negative resistance characteristics?
Options
A. UJT
B. PUT
C. Both UJT and PUT
D. UJT, PUT and SBS
Show Answer
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Discuss
Correct Answer: Both UJT and PUT
6. In molecules of ionic crystals, orientation polarization is zero.
Options
A. True
B. False
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Correct Answer: True
7.
Assertion (A):
Magnetism can be explained by the theory of magnetic domains.
Reason (R):
The existence of magnetic domains is evident from the Bitter powder patterns.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true but R is false
D. A is false but R is true
Show Answer
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Correct Answer: Both A and R are true but R is not correct explanation of A
8. Interference generated by electrical equipment and automobile ignition systems when observed closed to earth is
Options
A. horizontally polarized
B. vertically polarized
C. polarized both horizontally
D. not polarized
Show Answer
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Correct Answer: vertically polarized
9. Frequency range for satellite communication is
Options
A. 1 kHz to 100 kHz
B. 100 kHz to 10 MHz
C. 10 MHz to 100 MHz
D. 1 GHz to 30 GHz
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Correct Answer: 1 GHz to 30 GHz
10. To prevent a DC return between source and load, it is necessary to use
Options
A. resistor between source and load
B. inductor between source and load
C. capacitor between source and load
D. either (a) or (b)
Show Answer
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Discuss
Correct Answer: capacitor between source and load
Explanation:
Capacitor offers infinite impedance to DC.
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