BE Electronics Engineering BE Electronics Engineering Quiz 124 Welcome to Shaheen Leader Academy We expect 100% result. Click on Start Button. Your time is Ended. Thanks BE Electronics Engineering Quiz 1 / 25 Which combinations has no phase inversion of the signal :- CE and CE stages Two CE stages Three CE stages 2 / 25 In CE mode, leakage current is low;- False True 3 / 25 Leakage current flows through the thyristor in :- Reverse blocking mode Both a b Forward blocking mode 4 / 25 Forward bias is applied to an NPN transistor by + voltage to the emitter and -voltage to the base:- True False 5 / 25 The mean life time of the minority carriers is in the range of a few:- Seconds nano seconds Milli seconds 6 / 25 The time constant of an R-C circuit is defined as the time during which capacitor charging voltage actually rise to _________ percent of its maximum value;- 62, initial 62 final 37, initial 37 final 7 / 25 The ripple factor for a full wave rectifier is:- 0.482 0.96 1 8 / 25 Which element does not have five valence electrons:- Arsenic Antimony Gallium 9 / 25 In case of indirectly heated tubes the heater filament is made of:- tungsten manganin invar 10 / 25 A keeper is used to:- restore lost flux amplify flux provide a closed path for flux Change the direction of magnetic lines 11 / 25 Which measurement considers phase as an important parameter: Coherent Non coherent all of them 12 / 25 For insulators the energy gap of the order is:- 0.1 eV 5 to 15 eV 0.7 eV 13 / 25 Which material has the highest value of dielectric constant:- Ceramics Vacuum Glass Oils 14 / 25 CE circuit has input signal to the base and output from the collector:- False True 15 / 25 The negative feedback in an amplifier reduces voltage gain;- True False 16 / 25 Which rectifier needs four diodes:- Bridge rectifier Half wave rectifier Both a, b 17 / 25 The SCR is a silicon diode rectifier with a gate control electrode:- True False 18 / 25 When both the inductance and resistance of a coil are doubled the value of time constant:- Decrease Increase Remain unchanged 19 / 25 Which filter has maximum flatness :- Chebyshev filter High pass filter Butter worth filter 20 / 25 The auto starters can be used to start cage induction motor of the _________ type :- Both a b Delta connected star connected 21 / 25 The weighing matrix is :- Positive frequency Inverse of covariance matric of the input vector Both a b 22 / 25 Isolation amplifier are also called as ;- Iso-amps DC amplifier Output amplifier 23 / 25 Which one is a acceptor impurity element:- Arsenic Gallium Antimony 24 / 25 A thyristor is basically ; A set of SCRs A combination of diac and triac PNPN device 25 / 25 All the elements have three valence electrons except:- Indium Boron Arsenic Your score is LinkedIn Facebook Twitter VKontakte Restart quiz