NLC Technical Quiz 2

In two wattmeter method, which is used to measure power in a three-phase circuit what will be the reading of both the wattmeter individually when the power factor is unity.

A step-up chopper has input voltage of 300 V and output voltage of 900 V. If the conducting time of chopper is 50 µsec. then pulse width of output voltage is

In a single-phase inverter with RLC load, self-commutation of thyristor will be possible only if:

A 50Hz, 34.64 kV generator is connected to a power system. The system reactance and capacitance per phase are 5 mH and 0.04 pF respectively. What is the maximum voltage across the contacts of circuit breaker at an instant when it passes through zero?

A 4 pole, 3 phase, 50Hz induction motor is running at a speed of 1410 RPM. Neglecting stator impedance, core loss and friction and windage loss. The efficiency of the motor can be expressed as:

A certain 8-bit successive-approximation converter has 2.65 V full scale. The conversion time for V_A = 1.5 V is 75 μs. Find the conversion time for V_A = 2V.

A unity feedback control system has open loop transfer function,. Determine the range of ‘K’ for which the closed loop system has no pole in the right half od s-plane.

Which one of the following statement in true for a signal?

Which one of the following function is a linear function?

In a parallel RLC circuit, current in circuit at resonance will be: