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Last five years BSNL JTO exam question papers with answer
For a quarter wavelength ideal transmission line of characteristic impedance 50 ohms and load impedance ohms, the input impedance will be ” a 25W b 50Wc W d W Answer is: A four quadrant operation requires- a two full converters in series b two full converters connected back to back c two full converters connected in parallel d two semi converters connected back to back Answer is: You have entered an incorrect email address!
You can determine quickly the effect of adding poles and zeros by ” a Nicholas chart b Nyquist plot c Bode quesrion d Root locus. Please enter your email address here Save my name, email, and website answegs this browser for the next time I comment.
Signal transmission in sky wave propagation is due to ” a Reforction of wave b Reflection of wave c Pierus through Inosphere d Papere Answer is: Then, the answrrs part and wo are given by? The poles and zeros of a driving point function of a network are simple and interlace on the negative real axis with a pole closest to the origin. Here you will be able to find last 10 year sometimes even more or less question paper for absolutely free of cost.
In colour picture tube shadow mask is used to- a reduce x-ray emission b ensure that each beam strikes only its own dotsc increase screen brightness d provide degaussing for the screen Answer is: The characteristic impedance of a transmission line with inductance 0.
To form a quorum how many members of the Lok Sabha or Rajya Sabha should be present? The intrinsic impedance of free space- a is independent of frequency b decreases with increase of frequency c increases with increase of frequency d varies as square root of frequency Answer is: The transmission does not have – a Partition noise b Flicker noise c resistance d Short noise Answer is: A satellite link uses different frequencies for receiving and transmitting in order to ” a avoid interference from terrestrial microwave links b avoid interference between its powerful transmitted signals and weak in coming signal c minimize free-space losses d maximize antenna gain Answer is: The output of a class B amplifier – a is distortion free b consists of positive half cycles only c is like the output of a full wave rectifier d comprises short duration current pulses Answer is: When an antenna has a gain of 44dB then assuming that the main beam of the antenna is circular in cross-section the beam width will be – a 0.
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For transmission line load matching over a range of frequencies, it auestion best to use a- a balun b broad band directional coupler c double stub d single stub of adjustable position Answer is: The International Date Line is represented by- a meridian b meridian c meridian d meridian Answer is: One of the following modes which has the characteristics ppers attenuation becoming less as the frequency is increased and is attractive at icrowave frequencies of circular cylindrical wave guides is ” a TE1 mode b TM01 mode c TE01 mode d Higher order mode Answer is: Ninth Plan in India ranges from- a b c d Answer is: High loop gain qusetion.
The location of lightning arrestor is – a Near the transformer b Near the circuit breaker c Away from the transformer d None Answer is: The resolution of a logic analyser is – a the maximum number of input channels b the minimum duration ansewrs the glitch it can capture c it’s internal clock period d the minimum amplitude of input signal questiln can display Answer is: An amplifier with negative feedback – a lowers its lower 3 dB frequency b raises its upper 3 dB questionn c increases its bandwidth d all of the above Answer is: When Q factor of a circuit is high, then – a power factor of the circuit is high b impedance of the circuit is high c bandwidth is larged none of these Answer is: According to Barkhausen Criterion Phase shift of signal should be ” a b c d Answer is: What changes would be necessary in block C if FM signals are to be received – a Block becomes redundant b A FM amswers would be required c A high frequency signal generator 1d An additional local oscillator will be needed Answer is: These circuits converts input power at one frequency to output power at a different ito through one stage conversion ” a AC voltage controllers b Cyclo converters c Phase controlled rectifiers d Inverters Answer is: The electrical conductivity of metals which is expressed in ohm-1 m-1 is of the order of – a b c d Answer is: When an ac current of 5A and dc current of 5A flow simultaneously through a circuit then which of the following statement is true?
Radio Broadcasting is an example of ” a space multiplexing b time multiplexing c frequency multiplexing d none of the above Answer is: The energy gap in a semiconductor – a increases with temperature b remains constant c slightly increase with temperature d decrease with temperature Answer is: You can easily solve all kind of placement test papers by practicing the exercises given below. In an underground cable the distortion in the transmission of carrier frequency can be eliminated by using – a Inductive loading b Resistive loading c Capacitive loading d Shielding Answer is: