[{"id":111008,"question":"The impedance of RLC series resonance circuit at resonant frequency is","choices":[{"text":"Greater than R","value":"A"},{"text":"Equal to R","value":"B"},{"text":"Less than R","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":111007,"question":"An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is","choices":[{"text":"3525.0 volts","value":"A"},{"text":"35.35 volts","value":"B"},{"text":"353.5 volts","value":"C"},{"text":"3.535 volts","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":111006,"question":"To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance","choices":[{"text":"5.07 pF","value":"A"},{"text":"50 pF","value":"B"},{"text":"0.507 pF","value":"C"},{"text":"507 pF","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":111005,"question":"At resonance, the impedance of RLC series circuit is","choices":[{"text":"Maximum","value":"A"},{"text":"Zero","value":"B"},{"text":"Minimum","value":"C"},{"text":"Determinate","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":111004,"question":"When either L or C is increased, the resonant frequency of the RLC series circuit","choices":[{"text":"Increases","value":"A"},{"text":"Decreases","value":"B"},{"text":"Remains the same","value":"C"},{"text":"Becomes zero","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":111003,"question":"At resonance, the phase angle for RLC series resonance circuit equals","choices":[{"text":"0<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°</span>","value":"A"},{"text":"90<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°</span>","value":"B"},{"text":"180<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°</span>","value":"C"},{"text":"270<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°</span>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":111001,"question":"The power factor of resonant series circuit is","choices":[{"text":"1","value":"A"},{"text":"0","value":"B"},{"text":"-1","value":"C"},{"text":"0.5","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":111000,"question":"In RLC series circuit, resonance occurs when","choices":[{"text":"X<sub>L &gt; Xc</sub>","value":"A"},{"text":"X<sub>L &lt; Xc</sub>","value":"B"},{"text":"X<sub>L = Xc</sub>","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":110999,"question":"A resonance curve for RLC series circuit is a plot of frequency versus","choices":[{"text":"Voltage","value":"A"},{"text":"Current","value":"B"},{"text":"Impedance","value":"C"},{"text":"Reactance","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110998,"question":"The r.m.s. value of alternating current is equal to its maximum value at angle of","choices":[{"text":"60<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°</span>","value":"A"},{"text":"45<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°</span>","value":"B"},{"text":"30<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°</span>","value":"C"},{"text":"90<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°</span>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110997,"question":"The device which allows only the flow of an A.C. through a circuit is","choices":[{"text":"Capacitor","value":"A"},{"text":"Inductor","value":"B"},{"text":"D.C. motor","value":"C"},{"text":"Battery","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":110996,"question":"Alternating current can induce voltage because it has a","choices":[{"text":"High peak value","value":"A"},{"text":"Varying magnetic field","value":"B"},{"text":"Stronger field than direct curren","value":"C"},{"text":"Constant magnetic field","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110995,"question":"An A.C varies as a function of","choices":[{"text":"Current","value":"A"},{"text":"Voltage","value":"B"},{"text":"Time","value":"C"},{"text":"Charge","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":110994,"question":"At higher frequency of the alternating current, the capacitive reactance X<sub>c</sub>","choices":[{"text":"Increases","value":"A"},{"text":"Decreases","value":"B"},{"text":"Remains the same","value":"C"},{"text":"Increases only when the voltage increases","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110993,"question":"Which one of the following is correct?","choices":[{"text":"V<sub>o</sub>= 1.414 V<sub>rms</sub>","value":"A"},{"text":"I<sub>ams</sub>= 1.414 I<sub>o</sub>","value":"B"},{"text":"VO = 10.70 Vrms","value":"C"},{"text":"Both a and b","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":110992,"question":"In an A.C circuit with resistor only, the current and voltage have a phase angle of","choices":[{"text":"90<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°</span>","value":"A"},{"text":"0<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°</span>","value":"B"},{"text":"180<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°</span>","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110991,"question":"The basic circuit elements of A.C circuit are","choices":[{"text":"Resistor","value":"A"},{"text":"Inductor","value":"B"},{"text":"Capacitor","value":"C"},{"text":"All the three","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":110988,"question":"During each cycle, alternating voltage reaches a peak value","choices":[{"text":"One time","value":"A"},{"text":"Two times","value":"B"},{"text":"Four times","value":"C"},{"text":"A number of times depending on the frequency","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110986,"question":"The average of A.C. current and voltage over a complete cycle is","choices":[{"text":"Maximum","value":"A"},{"text":"zero","value":"B"},{"text":"Neither zero nor maximum","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2}]