Basic Electronics - Jun 2014

First Year Engineering (Semester 2)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks. 1(1) In hydraulic system, Quantity named Flow is described as a Output flow rate F₀,and in electrical quantity it is described as a_____.
(a) Voltage
(b)Current
(c) Capacitance
(d)nductance(1 marks) 1(10) A radio station transmitting Am wave with 1MHz frequency band having a wavelength of____.
(a)3meter
(b)300meter
(c)0.3meter
(d) 30meter(1 marks) 1(11) Commercial FM radio broadca sting utilizes a frequency band ______.
(a) 90MHz to 110MHz
(b) 70MHz to 120 MHz
(c) 110 Mhz to 180MHz
(d)88MHz to 108 MHz (1 marks) 1(12) n Which process Sampling is used?
(a) Frequency Division ,
(b) Signal amplification,
(c) Signal attenuation,
(d)Digital Modulation(1 marks) 1(13) Feedback control system in which the control action is dependent upon the ____.
(a) Input,
(b) Output,
(c)Compactness
(d)Cost of System(1 marks) 1(14) For the unit step response of the control system, rise time is given by the value from_____of its final value.
(a)10% to 90%,
(b)20% to 99 %
(c) 10 % to 80% ,
(d) 30% to 100%.(1 marks) 1(2) To find the linearity of the circuit network which theorem is used?
(a)KCL
(b)KVL
(c) Superposition
(d)Maximum power transfer(1 marks) 1(3) For the operational amplifier with inverting configuration the change in the phase of the output voltage is_______.
(a)180°
(b)90°
(c)270°
(d)45°(1 marks) 1(4) Which one is the Linear application design by Op-amp ?
(a)Integrator
(b)Voltage Regulator
(c) Multiper
(d) Comparator(1 marks) 1(5) The equivalent Decimal of the BCD (001110001001) BCD is ______.
(a)(388)₁₀
(b)(386)₁₀
(c)(380)₁₀
(d)(389)₁₀(1 marks) 1(6) Which are the logic gates kwon as a Universal Gates?
(a)XOR,AND
(b)AND,OR
(c)NAND,NOR
(d)XNOR,OR(1 marks) 1(7) By using which theorem we can replace the whole circuit network in single voltage and resistor network ?
(a)Superposition
(b)Maximum power transfer
(c)Nortan's Theorem
(d)Thevenin's Theroem(1 marks) 1(8) n the given pulse modulations, which one is n ot the type of pulse modulation?
(a)PWM
(b) PSK
(c) PPM
(d)PAM(1 marks) 1(9) Even signals are stratify the property for signal x(t) =____.
(a)x(-t)
(b)-x(t)
(c) -x(t)/4
(d)-x(t)/2(1 marks) 2(a) Explain in brief about Lumped circuit elements called resistorand capacitor(7 marks) 2(b)(1) Write a short note on Ammeter and Voltmeter (4 marks) 2(b)(2) Explain WYE -DELTA transformation in brief with necessary equations and circuit diagrams.(3 marks) 3(a) Determine the voltage across the 20 Ohm resistor in the following circuit of Figure.(a) with the application of superposition theorem