State, with reasons, whether the following statements are True or False
i) In L-C-R circuit, the current and voltage are in same phase only at a single frequency.
ii) Suppressor grid in pentode is kept at anode potential.
iii) Bipolar junction transistor (BJT) is a voltage controlled device.
iv) Reverse basng of a semconductor junction diode increases its energy band gap.
v) Amplifier with common emitter mode offers maximum current gain.
vi) Rectification efficiency is proportional to the number of diodes used in a rectifier circuit.
vii) Slew rate of an op-amp influences its frequency response.
viii) IC 7805 and IC 7905 must always be used together.
ix) Highest Modulus of the ring counter made up of 5 flip-flops is 25.
x) In a CRO the signal input voltage is given to the horizontal deflection plates.
(i) False , The Voltage across the resistance will be in phase with that current, and the Voltage across the capacitance must lag the current by 900.
(ii) True -A suppressor grid is a grid used in a thermionic valve (also called vacuum tube) to suppress secondary emission. A suppressor grid is also called the antidynatron grid, as it helps to reduce the dynatron effect.
(iii) False - BJT is a current controlled device because the output characteristics of BJT are determined by the
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Design and draw the circuit of a voltage regulator using LM 317 to provide an adjustable voltage between 6 to 12V.
Explain the working of J-K flip flop. How does it differ from R-S flip flop?
Use superposition principle to find voltage vo in Fig.1.
State the biasing conditions for E-B and C-B junctions in a BJT for its proper operation. Explain the output characteristics of a CE configuration of an amplifier
Divide 11618 by 318. Express the obtained result in decimal number.
With the help of a diagram explain the construction of a cathode ray tube. What measurements can you do by using of a CRO?
Design a zener regulated power supply to give 9.1V DC output with maximum load current of 50 mA. Assume that the minimum IZ required for proper functioning of zener diode is 5 mA, and the unregulated DC input is 12V. Indicate the value of RS
and power ratings of zener diode and RS.