[{"id":178158,"question":"In AC system we generate sine wave form because:","choices":[{"text":"It san be easily draw","value":"A"},{"text":"It produces least disturbance in electrical circuits","value":"B"},{"text":"It is nature standard","value":"C"},{"text":"Other waves cannot be produced easily","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":178157,"question":"In an LRC circiut, the capacitance is made one-fourth, when an resonance . Then what should be change in inductance, so that the circuit remain in resonance?","choices":[{"text":"4 times","value":"A"},{"text":"1/4 times","value":"B"},{"text":"8 times","value":"C"},{"text":"2 times","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":178156,"question":"In chopke coil the resistance X<sub>L</sub> an resistance R are:","choices":[{"text":"X<sub>L</sub>=R","value":"A"},{"text":"X<sub>L</sub>&lt;&lt;R","value":"B"},{"text":"X<sub>L</sub>&gt;&gt;R","value":"C"},{"text":"X<sub>L</sub>=<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;\">∞</span>","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":178150,"question":"The peak value of alternating current is 5<b style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;\">√2 </b><span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;\">A. The mean square value of current will be:</span>","choices":[{"text":"5A","value":"A"},{"text":"2.5A","value":"B"},{"text":"5<b style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;\">√2A</b>","value":"C"},{"text":"5<sup>2</sup>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":178149,"question":"The peak value of alternating current is 5<b style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;\">√2 </b><span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;\">A. The mean square value of current will be:</span>","choices":[{"text":"5A","value":"A"},{"text":"2.5A","value":"B"},{"text":"5<b style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;\">√2A</b>","value":"C"},{"text":"5<sup>2</sup>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":178145,"question":"A capacitor is perfectly insulator for:","choices":[{"text":"Direct current","value":"A"},{"text":"Alternating current","value":"B"},{"text":"Direct as well as alternating current","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":178144,"question":"The AC system is preferred to DC system because:","choices":[{"text":"AC voltage can be easily changed in magnitude","value":"A"},{"text":"DC motor angular velocity is affected badly","value":"B"},{"text":"High voltage AC transmission is less efficient","value":"C"},{"text":"Domestic appliance require AC voltage for their operation","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":60270,"question":"In Series resonance circuit the impedance of circuit art resonance frequency, is","choices":[{"text":"Maximum","value":"A"},{"text":"Minimum","value":"B"},{"text":"It is unequal to R","value":"C"},{"text":"None of above","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":60266,"question":"The resonance frequency is given by:","choices":[{"text":"fr = 2π√LC","value":"A"},{"text":"fr = 1/2πLC","value":"B"},{"text":"fr = 1/ 2π√LC","value":"C"},{"text":"f1 = 1/ 2πC√L","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":60265,"question":"The condition of resonance is:","choices":[{"text":"XL = 1/2 Xc","value":"A"},{"text":"X<sub>L</sub> = X<sub>c</sub>","value":"B"},{"text":"X<sub>c</sub> = 4<sub>x2</sub>","value":"C"},{"text":"None of above","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":60264,"question":"Power dissipation in A.C circuit is expressed as:","choices":[{"text":"P =I<sub>rms</sub> x V<sub>rms</sub> Sinθ","value":"A"},{"text":"IxVCosθ","value":"B"},{"text":"I<sub>rms</sub>xV<sub>rms</sub>Cosθ","value":"C"},{"text":"I<sub>rms</sub> x V<sub>rms</sub> Sin2θ","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":60263,"question":"Power dissipation is a pure inductive or in a pure capacitance circuit is:","choices":[{"text":"10<sup>6</sup>","value":"A"},{"text":"0","value":"B"},{"text":"10<sup>∘</sup>","value":"C"},{"text":"Maximum","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":60261,"question":"Unit of impedance is:","choices":[{"text":"Ohm","value":"A"},{"text":"Ohm<sup>-1</sup>","value":"B"},{"text":"no unit","value":"C"},{"text":"Ohm m<sup>-1</sup>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":60260,"question":"Impedance is denoted by:","choices":[{"text":"A&nbsp;","value":"A"},{"text":"Z","value":"B"},{"text":"P","value":"C"},{"text":"Q","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":60258,"question":"The combined effect of resistance and reactance in circuit is called:","choices":[{"text":"Impedance","value":"A"},{"text":"Inductance","value":"B"},{"text":"Capacitance","value":"C"},{"text":"None of above","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":60256,"question":"X<sub>L</sub>=","choices":[{"text":"2πfL","value":"A"},{"text":"1/2πfL","value":"B"},{"text":"2πfL","value":"C"},{"text":"fL/2π","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":60254,"question":"In A.C circuit of inductor which one is true","choices":[{"text":"Voltage leads current by phase angle&nbsp;π/2","value":"A"},{"text":"Voltage lags current by&nbsp;π/2","value":"B"},{"text":"Current leads voltage by&nbsp;π/2","value":"C"},{"text":"Both remain in phase","value":"D"},{"value":"E"}],"correctAnswer":1}]