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 input current. In a p-n junction i.e base-emitter junction in BJT the change in voltage (Vbe) is produced only after the change
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