In integral cycle control of ac regulator, the input power factor is equal to du

CuriousTab

CuriousTab

Home Aptitude

Discussion

Home ‣ Electronics and Communication Engineering ‣ Power Electronics See What Others Are Saying!

Question
In integral cycle control of ac regulator, the input power factor is equal to
Options
A. duty cycle a
B. a²
C. a
D. (a)^1/3

Correct Answer

a

More questions

1. Consider the following applications
1. TV tuning
2. Active filter
3. Microwave frequency multiplication
In which of above can a varactor diode be used?
Options
A. 1 2 and 3
B. l and 2 only
C. 1 and 3 only
D. 2 and 3 only

2. Consider a unity feedback control system with open-loop transfer function The steady state error of the system due to a unity step input is :
Options
A. zero
B. K
C. 1/K
D. infinite

3. The electric field of the incident wave is , where ? = 3 x 10⁹p and ? = 10 p. The electric field of the transmitted wave E_t is given by
Options
A.
B.
C.
D.

4. If the system T.F. is The differential equation representing the system is
Options
A.
B.
C.
D. none of these

5. A single phase half wave controlled rectifier circuit has a free wheeling diode. The load is a combination of R and L. The firing angle is a. The period of conduction of SCR and free wheeling diode respectively are
Options
A. a < ?t < p and p < ?t < (2p + a)
B. a < ?t < p and p < ?t < 2p
C. a < ?t < (p + a) and (p + a) < ?t < 2p
D. a < ?t < p and p < ?t < (2p - a)

6. For the minterm designation Y = ? m (1, 3, 5, 7) the complete expression is
Options
A. Y = A BC + A B C
B. Y = A B C + A B C + ABC + A BC
C. Y = A B C + A B C + ABC + A BC
D. Y = A B C + ABC + A BC + A BC

7. A fully controlled bridge converter feeds a highly inductive load such that the load current can be assumed to be constant. The wave shape of input current is
Options
A. dc
B. sinusoidal
C. rectangular
D. none of the above

9. In a bridge inverter
Options
A. an output transformer is essential
B. an output transformer is not essential
C. an output transformer cannot be connected
D. an output transformer, if used, can improve the efficiency of the circuit

10. Which of the following is used to provide tracking between RF amplifier and local oscillator stages of receiver?
Options
A. Variable tuning inductor
B. Ganged tuning inductor
C. Variable capacitor
D. Variable preset

Comments

More in Electronics and Communication Engineering: