A single phase motor connected to 400 V, 50 Hz supply takes 25 A at a power factor of 0.75 lagging. Calculate the capacitance required in parallel with the motor to raise the power factor to 0.95 lagging. 62.55 pF 92.55 pF 72.55 pF 82.55 pF TRUE ANSWER : ? YOUR ANSWER : ?
In two-part tariff, the ____ charges depend upon the maximum demand of the consumer and the ____ charges depend upon the number of units consumed by the consumer. semi-fixed, running fixed, running running, fixed fixed, semi-fixed 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. Statement 1 is TRUE and Statement 2 is FALSE 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 TRUE ANSWER : ? YOUR ANSWER : ?
The International boundary 'Radcliffe Line’ lies between India and Pakistan China Afghanistan Japan TRUE ANSWER : ? YOUR ANSWER : ?
If the phase velocity of a plane wave in a perfect dielectric is 0.4 times its value in free space, then what is the relative permittivity of the dielectric? 2.5 6.25 1.25 4.25 TRUE ANSWER : ? YOUR ANSWER : ?
A three phase four pole 50 Hz induction motor has a rotor resistance of 0.02 Ω/phase and stand-still reactance of 0.5 Ω/phase. Calculate the speed at which the maximum torque is developed. 1475 rpm 1500 rpm 1440 rpm 1525 rpm TRUE ANSWER : ? YOUR ANSWER : ?
Which country leads in the production of biofuel in the world? Germany United States of America Argentina Brazil TRUE ANSWER : ? YOUR ANSWER : ?
A group of computers and other devices connected together is called a network and the concept of connected computers sharing resources is called ____ Networking Routing Switching Linking TRUE ANSWER : ? YOUR ANSWER : ?
Thermopile is used for the measurement of flow rate emf temperature current TRUE ANSWER : ? YOUR ANSWER : ?
In a 3-phase, 4-wire, 400/230 V system, a lamp (L₁) of 100 W is connected to one phase and neutral and a lamp (L₂) of 150 W is connected to the second pahse and neutral. If the neutral wire is disconnected accidently, what will be the voltage across a 150 W lamp (L₂)? 160 V 120 v 240 V 180 V TRUE ANSWER : ? YOUR ANSWER : ?