A 50 Hz synchronous generator is connected to an infinite bus through a line. The p.u. reactances of generator and the line are j0.3 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. 1.32 Hz 1.62 Hz 1.42 Hz 1.52 Hz TRUE ANSWER : ? YOUR ANSWER : ?
In a test by Murray loop for ground fault on 600 m of cable having a resistance of 1.5 Ω/km, the faulty cable is looped with a sound cable of the same length and area of cross section. If the ratio of the other two arms of the testing network at balance is 3 : 1, find the distance of the fault from the testing end of cables. 400 m 300 m 100 m 200 m TRUE ANSWER : ? YOUR ANSWER : ?
In a synchronous motor with field under excited, the power factor will be leading lagging unity zero TRUE ANSWER : ? YOUR ANSWER : ?
Calculate the inductance per meter of a 50 Ω load cable that has an capacitance of 20 pF/m. 25 nH 25 mH 50 mH 50 nH TRUE ANSWER : ? YOUR ANSWER : ?
Choose the word which best expresses the similar meaning of the given word "LUCID" Clear Sensible Cloudy Puzzled TRUE ANSWER : ? YOUR ANSWER : ?
આપને કાઈ મશીન નથી કે અમુક ગોઠવણો પ્રમાણે કાર્ય જ કરીએ. - ઉપરોક્ત વાક્ય જુદાં પાડવા ક્યાં સંયોજકો કાઢવા પડે. કાઈ કે જ અમુક TRUE ANSWER : ? YOUR ANSWER : ?
શિક્ષકે વિદ્યાર્થીને વાર્તા કહી'<br/>1. વાક્ય અક્મર્ક છે.<br/>2. વાક્ય દ્રીકર્મક છે.<br/>3. વાક્યમાં વિદ્યાર્થીને 'પ્રધાન કર્મ' છે અને વાર્તા 'ગૌણ કર્મ' છે.<br/>4.વાક્યમાં વાર્તાને 'પ્રધાન કર્મ' છે અને વિધાથીને 'ગૌણ કર્મ' છે 1,3 1,3 2,3 2,4 TRUE ANSWER : ? YOUR ANSWER : ?
Magnetic tape is not practical for applications where data must be quickly recalled because tape is a/an____. expensive storage medium None of these Sequential access medium Random access medium TRUE ANSWER : ? YOUR ANSWER : ?