0% 0 Electrical Engineering Quiz 44 1 / 50 A pure capacitor connected across an A.C. voltage consumed 50 W. This is due to________? the size of the capacitor being quite big the capacitive reactance in ohms the statement is incorrect the current flowing in capacitor 2 / 50 Magnetic compass needle will be deflecting if it is kept near________________? Static charge Soft iron Semi-conductor Accelerating charge 3 / 50 Demodulation is done in ________________? Receiving antenna Transmitter Transmitting antenna Radio receiver 4 / 50 In an AM wave useful power is carrier by ______________? Carrier Both sidebands and carrier None of the above Sidebands 5 / 50 Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant ________? 200 150 50 100 6 / 50 If a third equal and similar charge is placed between two equal and similar charges, then this third charge will_____________? not be in equilibrium move out of the field of influence of the two charges remain in stable equilibrium be in unstable equilibrium 7 / 50 Which of the following is a ferromagnetic material ? Nickel Copper Aluminium Tungsten 8 / 50 A Zener diode______________? Acts like a battery in the breakdown region Has a barrier potential of 1 V Is a battery Is forward biased 9 / 50 The push-pull circuit must use ______________ operation? Class A Class C Class B Class AB 10 / 50 Heat is transferred simultaneously by condition, convection and radiation_____________? during melting of ice inside boiler furnaces through the surface of the insulted pipe carrying steam from refrigerator coils to freezer of a refrigerator 11 / 50 The closed-loop voltage gain of an inverting amplifier equal to______________? The open-loop voltage gain The input resistance The ratio of the input resistance to feedback resistance The feedback resistance divided by the input resistance 12 / 50 Which of the followings is/are active element? Voltage source Current source None of these. Both 13 / 50 If gate current is increased, then anode-cathode voltage at which SCR closes_________________? Is decreased Is increased Remains the same None of the above 14 / 50 A monostable vibrator has_____________ One stable state Two stable states None of the above No stable state 15 / 50 The switch board instruments________________? should be mounted in horizontal position should be mounted in vertical position None All 16 / 50 The frequency and time domain are related through which of the following ? Laplace Transform None Fourier Integral Laplace Transform and Fourier Integral 17 / 50 Calculate the cutoff frequency of a first-order low-pass filter for R1 = 2.5k? and C1 = 0.05?F___________? 1.273kHz 12.73kHz 127.3 kHz 127.3 Hz 18 / 50 The force per unit charge is know as__________________? electric intensity electric potential all of above are same electric flux 19 / 50 In the differential voltage gain & the common mode voltage gain of a differential amplifier are 48db &2db respectively, then its common mode rejection ratio is__________? 25dB 46dB 23dB 50dB 20 / 50 If variable part of annual cost on account of interest and depreciation on the capital outlay is equal to the annual cost of electrical energy wasted in the conductors, the total annual cost will be minimum and the corresponding size of conductor will be most economical. This statement is known as___________________? Ohm?s law Kelvin?s law Kirchhoffs law Faraday?s law 21 / 50 Emitter follower is used for ________________? Impedance matching None of the above Voltage gain Current gain 22 / 50 A car is raining at a constant speed of 50 km/h, which of the following is the feedback element for the driver ? Eyes Clutch Steering wheel Needle of the speedometer 23 / 50 The current drawn by the armature of D.C. motor is directly proportional to__________? none of the above the torque required the voltage across the terminals the speed of the motor 24 / 50 In a series L-C circuit at the resonant frequency the__________? current is minimum voltage across C is minimum impedance is maximum current is maximum 25 / 50 Long distance transmission is easy for________________? A.C voltage Half A.C voltage Half D.C voltage D.C voltage 26 / 50 Minimum voltage regulation occurs when the power factor of the load is_____________? leading unity lagging zero 27 / 50 The output transformer used in a power amplifier is a _____________ transformer? Step-down 1:1 ratio None of the above Step-up 28 / 50 A dynamometer wattmeter can be used for______________? D.C. only A.C. only any of the above both D.C. and A.C. 29 / 50 An RL low-pass filter consists of a 5.6 mH coil and a 3.3 k? resistor. The output voltage is taken across the resistor. The circuit?s critical frequency is______________? 93.8 kHz 86.12 kHz 93.8 Hz 861 Hz 30 / 50 In an automatic control system which of the following elements is not used ? Sensor Final control element Oscillator Error detector 31 / 50 The changes in volume of transformer cooling oil due to variation of atmospheric temperature during day and night is taken care of by which part of transformer? Bushings Buchholz relay Breather Conservator 32 / 50 The effective channel length of a MOSFET in a saturation decreases with increase in___________? Drain voltage Body voltage Source voltage Gate voltage 33 / 50 The magnitude of the induced e.m.f. in a conductor depends on the______________? amount of flux cut flux density of the magnetic field amount of flux linkages rate of change of flux-linkages 34 / 50 Direct conversion of heat into electric power is possible through__________? thermionic converter batteries all of the above fuel cell 35 / 50 If the negative potential on the control grid of CRT is increased, the intensity of spot _____________? Is increased None of the above Remains the same Is decreased 36 / 50 In the double tuned circuit, if the mutual inductance between the two tuned circuits is decreased, the level of resonance curve ___________________? None of the above Remains the same Is raised Is lowered 37 / 50 An induction motor has relatively high power factor at__________? 20 percent load near full load rated r.p.m. no load 38 / 50 The path of a magnetic flux in a transformer should have______________? low resistance high reluctance high resistance low reluctance 39 / 50 If a single phase induction motor runs slower than normal, the most likely defect is_____________? worn bearings short-circuit in the winding open-circuit in the winding none of the above 40 / 50 Gate circuit or triggering circuit of a thyristor is lower power circuit. high power circuit. magnetic circuit. may be low power or high power circuit 41 / 50 The ideal load factor should be_____________? negative. unity zero infinity. 42 / 50 For the parallel operation of two or more D.C. compound generators, we should ensure that_______________? all the series fields should be run in parallel by means of equilizer connection series fields of all generators should be either on positive side or negative side of the armature polarity of incoming generator should be same as that of bus bar voltage of the incoming generator should be same as that of bus bar 43 / 50 Spark plug makes use of which of the following materials for insulation ? Asbestos Slate Porcelain Glass 44 / 50 When the transistor (CE arrangement) is in the cut off region, the collector current is ______________? ICBO IC(sat) (? + 1) ICEO ICEO 45 / 50 The base resistor method is generally used in ________________? Amplifier circuits Rectifier circuits Switching circuits None of the above 46 / 50 Regenerative feedback implies feedback with_______________? positive sign step input oscillations negative sign 47 / 50 In an unregulated power supply, if input a.c. voltage increases, the output voltage _______________? Decreases Increases Remains the same None of the above 48 / 50 When drain voltage equals the pinch-off-voltage, then drain current ___________ with the increase in drain voltage? none of the above decreases increases remains constant 49 / 50 The total deficiency or excess of electrons in a body is known as____________? voltage potential gradient current charge 50 / 50 Which of the following materials is used for making coils of standard resistances ? Manganin Nichrome Copper Platinum Provide Your Information Your score is The average score is 0% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevElectrical Engineering Quiz 43 Electrical Engineering Quiz 45Next
