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You Are On Multi Choice Question Bank SET 1294

64701. In a single phase cycloconverter with centre tapped transformer





64702. The radical wing of the Congress Party, with Jawaharlal Nehru as one of its main leaders, founded the ‘Independence for India League’ in opposition to?





64703. Thyristors can be used for control of





64704. Assertion (A): Thyristors can be used in controlled heating, excitation systems of alternators, speed control of motors and HVDCReason (R): A static var system using thyristors is very commonly used in high voltage ac systems.





64705. In a dual converter operated in circulating current mode, the circulating current flows





64706. For a single phase half wave converter feeding a resistive load, the firing angle a . The waveshape in below figure is for





64707. A class B chopper operates in third quadrant.



64708. In a full bridge circuit supplying an RLC under damped circuit





64709. In a semi converter feeding a resistive load





64710. In an n stage high frequency series inverter having a time period T, each stage is active for a time interval of


64711. In a 3 phase semiconverter, the output voltage becomes discontinuous for





64712. A single phase fully controlled bridge converter is feeding an RLE load. Input voltage is Vm sin ωt and firing angle is a . If average current is I0, then





64713. In integral cycle control of ac regulator, the input power factor is equal to





64714. McMurrary full bridge inverter uses





64715. 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





64716. A static excitation system uses





64717. The application of gate signal decreases the break over voltage of on SCR.



64718. The power factor at the input terminals of a cyclo- converter is generally





64719. Ripple factor RF and form factor FF are related as





64720. Modified Mc Murray full bridge inverter uses





64721. Assertion (A): Gate triggering is the most commonly used method for triggering of an SCR.Reason (R): Even a small gate current is sufficient to turn on an SCR.





64722. A cycloconverter can be





64723. In the below figure the average load current is 15 A. The rms value of transformer secondary current is





64724. In a 3 phase fully controlled converter the firing frequency is





64725. Two thyristor of same rating and same specifications





64726. The amount of dielectric heating is inversely proportional to frequency.



64727. Which type of flux is used for soldering G.I.Sheets?





64728. The cooling capacity of 0 TR is:





64729. The atmospheric pressure at sea level is taken as:





64730. The freezing temperature of water is:





64731. The mechanical fault in refrigerator system is:





64732. In a broadcast superheterodyne receiver





64733. A duplexer is a device used to





64734. A heterodyne frequency changer is called a





64735. RF amplifiers are used in radio receivers for





64736. The sensitivity curve of a standard receiver is represented by





64737. Which are the popular IF frequencies for microwave and radar receivers operating on frequencies in the range 1 to 10 GHz





64738. In a ratio detector





64739. Neutralization is used in RF amplifiers to





64740. When fs is the signal frequency and fi is the intermediate frequency, then image frequency fsi is given by



64741. It is known that noise phase modulates the FM wave. As the noise side band frequency approaches the carrier frequency, the noise amplitude





64742. In a receiver, which of the following device has IF input but RF output?





64743. Transistor are free from which type of noise?





64744. Standard AM radio broadcasts are confined to





64745. Boiling point of R 600a is:





64746. The condenser coil type which used in deep freezer commonly:





64747. A transmitter serial current contains





64748. In a broadcast superheterodynes receiver having no RF amplifier, the loaded Q of the antenna coupling circuit is 100. If the intermediate frequency is 455 kHz. The image frequency at 25 MHz will be





64749. Internal energy of a substance is proportional to:





64750. The noise produced by a resistor is proportional to



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