RRB JE Stage II exam is scheduled to be conducted from 28th August to 1st September2019. The overall merit for the selection will be made on the basis of the marks scored in stage II, so candidates need to prepare thoroughly for the second stage. To help the aspirants, Adda247 has come up with a study plan in which we will provide you daily quizzes of all technical subjects. The below quiz will be helpful for the candidates who opted Electronics as the exam group in RRB JE stage II.
Q1. Which is correct with respect to the size of the data types?
(a) char > int > float
(b) int > char > float
(c) char < int < double
(d) double > char > int
Sol. char has less bytes than int and int has less bytes than double in any system.
Q2. Find the voltage Vx in the given[/expand] circuit.
Sol. From the circuit applying Kirchhoff’s voltage law,
we can write 50= 15+ 10+ 15+Vx => Vx= 10V.
Q3. For maximum transfer of power, internal resistance of the source should be
(a) equal to load resistance
(b) less than the load resistance
(c) greater than the load resistance
(d) none of the above
Sol. Maximum power transfer theorem states that, to obtain maximum external power from a source with a finite internal resistance, the resistance of the load must equal the resistance of the source as viewed from its output terminals.
(a) 20 Hz
(b) 30 Hz
(c) 40 Hz
Q6. ………..increases the steady state accuracy
(c) Phase lead compensator
(d) Phase lag compensator
Sol. Integrator increases the steady state accuracy.
Q7. The transient response, with feed-back system
(a) rises slowly
(b) rises quickly
(c) decays slowly
(d) decays quickly
Although it is not necessary that transient response decreases everyone a feedback is applied, for eg. take the case of positive feedback or any BIBO unstable system in negative feedback where the feedback does increases oscillations and instability. So, supposing you are talking about a BIBO stable negative feedback, the feedback produces an actuating signal that is the difference of input and feedback processed output which introduces a damping in the system, so this damping is the reason transient response decreases.
Q8. In a vacuum tube diode current flow is due to
(a) electrons only
(b) holes only
(c) positive ions only
(d) none of the above
Sol. By removing the air from the tube to create a vacuum, the electrons have a clear path from the anode to the cathode, and a current is created. When the cathode is heated, and a positive voltage is applied to the anode, electrons can flow from the cathode to the anode.
(a) 2.455 mho/m
(b) 1.765 mho/m
(c) 1.865 mho/m
(d) None of the above
Q10. LCD display represents
(a) Light decoding device
(b) Liquid crystal display
(c) Lead cascade demonstrator
(d) Linear digital demonstrator
Sol. Full form of LCD is Liquid crystal display.
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