GATE 2021 : Toppers Quiz 28 (App update required to attempt this test)

Consider diodes are ideal,

What is the states of the diode

FB → Forward Bias

RB → Reverse Bias

As frequency is varied from 0 to ∞ the Nyquist plot of , the maximum phase (in ⁰) of the sinusoidal transfer function is___________

What will be the value of x for the number (11B)_x?

A 4-pole, 50 Hz, 400 V, Y-connected induction motor has a maximum torque of 300 Nm at 1410 RPM. The value of rotor resistance in Ω will be: (Answer upto two decimal places)

In the system shown in the figure, a 3-ϕ static capacitive reactor of reactance 1.2 p.u. per phase is connected through a switch at the motor bus bar. Assume the internal voltage of generator to be 1.5 p.u. and that of the motor to be 1.0 p.u. Find the ratio of steady state power limit, when switch is opened to when switch is closed.

A step-down chopper is operated in the continuous conduction mode at a frequency of 4 kHz. If the dc output and input voltages are 150 V and 220 V respectively. The on (T_on) and off period (T_off) of thyristor in each cycle are

The power output from a hydro-electric power plant depends on three parameters.

A Standard cell of 1.0185 V with a simple potential meter balances at 50 cm. Calculate percentage error in an ammeter that reads 0.43 A and balance is obtained at 43.2 cm with potential difference across a 2 Ω resister in ammeter circuit?

A 2-port network can be described by the following equations:

This network is:

A compound DC generator is supplying a load and working as cumulative generator. If now machine behave as a motor, it will behave as:

Find V_o if 3 mV, 2 kHz sinusoidal Signal is applied at input terminal. If R = 5 kΩ & C = 5 μF

A 3-ϕ, 20-pole, synchronous generator has 180 stator coils with double layer full pitch winding. The rotor is driven at 300 RPM and flux per pole (sinusoidally distributed) is 25 mWb the voltage induced per phase is nearest to

It is desired to locate the poles of the transfer function at -4 and by using the suitable PID controller with suitable gains for the system given below.

The value of

Consider the circuit shown in the figure below.

An image change of 2C is place at a point (3, 1, 0) position. If the Bounding x & y one kept at zero potential.

What will be the approximate potential at point P due the change of 2C.

Find [H] parameter matrix of given network:

The coefficient of x² in series expansion of e^x cosx is_____

A 2-pole, 50 Hz, 11 kV, turbo generator has a rating of 60 MW, power factor 0 .85 lagging. Its rotor has a moment of inertia of 8800 kg.m² calculate its inertia constant in MJ/MVA

Consider the circuit shown below :

The resonant frequency of the circuit will be :

A boost converter supplies to a load with output voltage of 25 V from a supply voltage of 10V. What is the efficiency of chopper if the Inductor resistance is 0.1Ω (in percentage)?

The range of system gain k for which the system will be under damped is

G(s)H(s) = k(s+2)(s+4)/s².

Consider a transistor circuit shown in figure.

If Q₁ and Q₂ are identical transistor and V_BE = 0.7V, so value of R₂ is ____ kΩ. Assume (V_T = 25 mV) (Answer should be correct up to two decimal place)

A 100KVA, 50Hz, 400/11000 V, 1-phase transformer has efficiency of 98.5% when supplying load current at 0.8pf and efficiency of 99% when supplying half load current (in Amperes) at unity pf. Value of load current at maximum efficiency be___A.

If y^a is an integrating factor for the differential equation 2xydx–(3x² – y²)dy = 0. Then the value of a is

A 6-bit Dual Slope A/D converter uses a reference of –6V and a 1 MHz clock. It uses a fixed count of 40 (101000). Find Maximum Conversion Time. (in μsec)?