The current in the coil of a large electromagnet falls from 6 A to 2 A in 10 ms. The induced emf across the coil is 100 V. Find the self-inductance of the coil. 0.5 H 0.25 H 1.25 H 0.75 H TRUE ANSWER : ? YOUR ANSWER : ?
Data Encryption Standard (DES) was designed by None of these IBM Apple Microsoft TRUE ANSWER : ? YOUR ANSWER : ?
Which country leads in the production of biofuel in the world? Brazil Germany Argentina United States of America TRUE ANSWER : ? YOUR ANSWER : ?
Medium voltage covered conductors (MVCC) are produced in voltage rating less than 3.3 kV between 132 kV to 200 kV beyond 200 kV between 6.6 kV to 33 kV TRUE ANSWER : ? YOUR ANSWER : ?
A 50 Hz synchronous generator is connected to an infinite bus through a line. The p.u. reactances of generator and the line are j0.4 p.u. and j0.2 p.u. respectively. The generator no load voltage is 1.1 p.u. and that of infinite bus is 1.0 p.u. The inertia constant of the generator is 4 MW-sec/MVA. Determine the frequency of natural oscillations if the generator is loaded to 60% of its maximum power transfer capacity and small perturbation in power is given. 1.8 Hz 1.2 Hz 0.8 Hz 1.6 Hz TRUE ANSWER : ? YOUR ANSWER : ?
Consider a solar PV plant with the following specific conditions:<br/>Analysis period: 1 year<br/>Measured average solar irradiation intensity in 1 year: 150 kWh/m²<br/>Generator area of the PV plant: 10 m² Efficiency factor of the PV modules: 15%<br/>Electrical energy actually exported by plant to grid: 135 kWh<br/>Calculate the performance ratio. 80% 50% 75% 60% TRUE ANSWER : ? YOUR ANSWER : ?
Which among these components connects to physical equipments of the distribution system? Central control room with host computers Communication infrastructure Remote Terminal Unit None of these TRUE ANSWER : ? YOUR ANSWER : ?
The maximum value of power factor is ____ and it exists in a pure____ circuit. 1, resistive 0.866, resistive 1, inductive 0.866, inductive TRUE ANSWER : ? YOUR ANSWER : ?
The International boundary 'Radcliffe Line’ lies between India and Japan Pakistan China Afghanistan TRUE ANSWER : ? YOUR ANSWER : ?
The magnetizing inrush current in a transformer is rich in the harmonic component. seventh second third fifth TRUE ANSWER : ? YOUR ANSWER : ?