List of practice Questions

For an input voltage \( v = 10 \sin 1000t \), the Thevenin's impedance at the terminals X and Y for the following circuit is

Under which dimension of business environment is "Online Booking of Air Tickets" included?
Match List-I with List-II on the basis of Management Principles:

List-I (Meaning)

List-II (Term)

(A) Employees turnover should be minimised(I) Stability of personnel
(B) Emphasises kindliness and justice(II) Equity
(C) Chain of authority and communication from top to bottom(III) Scalar chain
(D) Promotes team spirit(IV) Esprit de corps
The aim of which technique by F.W. Taylor is to reduce a product to fixed types and sizes?
Match List-I with List-II on the basis of Management Principles:

List-I

List-II

(A) Obedience to organisational rules(I) Unity of direction
(B) One boss for every individual employee(II) Remuneration of employees
(C) One head and one plan(III) Discipline
(D) Remuneration should be just and equitable(IV) Unity of command
Identify the Principle of Management where Taylor pioneered the method of scientific inquiry.
Newton-Raphson iterative formula for finding \[ \frac{1}{\sqrt{N}}, (N>0) \] is
Among the following, Rolle's theorem is not applicable for
In a 3-$\phi$ star connected balanced circuit, if angle between phase voltage \( V_p \) and phase current is \( \theta \) (leading), then the wattmeter readings in two wattmeter method are:

____ fault analysis is used to calculate the rupturing capacity of circuit breakers

Which of the following triggering circuits can be used in feed-back control systems?
A 1-\(\phi\) inverter is fed with an RLC series load of \( R = 1\,\Omega, X_L = 6\,\Omega \) and \( X_C = 7\,\Omega \). Then the phase angle between fundamental current and third harmonic voltage is
A 1-\(\phi\) AC voltage controller feeds a load resistance of \( R \). If firing angles of two switches are off set at \( 180^\circ \), then rms value of input current is
A 3-\(\phi\) semi-converter drives a dc motor which runs at a rated speed of 1000 rpm at \( 0^\circ \) firing angle. Find the speed of the motor when firing angle is \( 60^\circ \).
The ratio of latching current to holding current of SCR
Design minimum value of capacitance \( C \) needed for a Buck converter with a frequency \( f = 100 \, \text{kHz} \) so that ripple voltage \( V_r \) is less than 1% of output voltage \( V_o \). Assume the duty ratio \( \delta = 0.6 \) and inductor \( L = 25 \, \mu H \).
Which of the following is not a feature of CSI fed AC motor drive?
A snubber circuit used for protection of a power diode consists of
The sequence of devices in the order of decreasing frequency of operation are
A 1-\(\phi\) fully controlled bridge rectifier with a highly inductive load is fired at an angle of cos\(^{-1}(0.8)\). Assuming the load current is pure dc, the input power factor is
The instantaneous voltage wave-form of a 3-\(\phi\) fully controlled rectifier with R-L load is more negative and less positive when the firing angle ‘α’ lies between
Choose the most correct Voltage vs. Frequency plot of a 3-phase variable speed Induction motor drive at constant flux operation
Find rms value of output voltage of a 220 V input Type A chopper for a duty ratio of 0.25, assuming a voltage drop of 2 V across the chopper when it is on.
A 230 V supply is excited into a motor controlled by a 220 V, 50 Hz, 1-\(\phi\), full-converter. What is the minimum firing angle when back emf equal to 190 V?

The Op-Amp circuit shown below is a (an)