A DC shunt generator has an induced voltage of 220 V on open circuit. When the machine is on load the terminal voltage is 200 V. Find the load current if the field resistance is 100 Ω and armature resistance is 0.2 Ω. 96 A 104 A 102 A 98 A TRUE ANSWER : ? YOUR ANSWER : ?
Consider the following statements and choose the correct option.<br/>Statement 1: The speed regulation of a synchronous motor is always unity.<br/>Statement 2: In a synchronous motor, at no-load condition, and with normal excitation the armature current drawn by a synchronous motor is in phase with applied voltage. Statement 1 is FALSE and Statement 2 is TRUE Both Statement 1 and Statement 2 are TRUE Statement 1 is TRUE and Statement 2 is FALSE Both Statement 1 and Statement 2 are FALSE TRUE ANSWER : ? YOUR ANSWER : ?
The most commonly used method for the protection of three phase feeder is Time graded protection Differential protection None of these Reverse power protection TRUE ANSWER : ? YOUR ANSWER : ?
If the power supplied by current source shown in figure is double of that supplied by the voltage source, then the value of 'R' is 2.5 Ω 7.5 Ω 5 Ω 3.33 Ω TRUE ANSWER : ? YOUR ANSWER : ?
In transformer testing, Sweep Frequency Response Analysis (SFRA) testing is a tool to help locate ____ All of these Winding damage Core movement Short circuits TRUE ANSWER : ? YOUR ANSWER : ?
In transformers,<br/>Statement 1: Deterioration of oil may occur due to the result of prolonged overloading of the transformer.<br/>Statement 2: Dielectric faults occur in the winding due to turn-to-turn insulation breakdown. Both Statement 1 and Statement 2 are TRUE Both Statement 1 and Statement 2 are FALSE Statement 1 is FALSE and Statement 2 is TRUE Statement 1 is TRUE and Statement 2 is FALSE TRUE ANSWER : ? YOUR ANSWER : ?
A 10-pole induction motor is supplied by a 6-pole alternator, which is driven at 1400 rpm. If the motor runs with a slip of 5%, what is its speed? 798 rpm 1425 rpm 1575 rpm 882 rpm TRUE ANSWER : ? YOUR ANSWER : ?
A conductor having surface density is embedded in a dielectric medium of permittivity. The electric field in the medium is E. If it is known that the pressure p on the conductor surface is equal to the electric energy density in the medium, then p (in SI unit)is given by σ²/(2πε) σ²/(2ε) σ²/(4π) σ/(4πε) TRUE ANSWER : ? YOUR ANSWER : ?
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 0.75 H 1.25 H 0.25 H TRUE ANSWER : ? YOUR ANSWER : ?