Objective Questions Short notes Objective questions (Answers are given below) The emitter of a transistor is generally dopedthe heaviest because it(a) has to dissipate maximum power(b) has to supply the charge carriers(c) is the first region of the transistor(d) must possess low resistance. For current working of an NPN bipolar junctiontransistor, the different electrodes should … Read more
Objective Questions Short notes Objective questions (Answers are given below) The main job of a voltage regulator is to providea nearly—output voltage.(a) sinusoidal (b) constant(c) smooth (d) fluctuating. A 10-V dc regulator power supply has a regulationof 0.005 per cent. Its output voltage willvary within an envelope of ……………….. millivolt.(a) ± 2.5 (b) ± 0.5(c) … Read more
Objective Questions Short notes Objective questions (Answers are given below) The ripple factor of a power supply is ameasure of(a) its filter efficiency(b) its voltage regulation(c) diode rating(d) purity of power output. The basic reason why a FW rectifier hastwice the efficiency of a HW rectifier is that(a) it makes use of a transformer(b) its … Read more
Objective Questions Short notes Objective questions (Answers are given below) Silicon is preferred for manufacturing Zenerdiodes because it(a) is relatively cheap(b) needs lower doping level(c) has higher temperature and currentcapacity(d) has lower break-down voltage. When used in a circuit, a Zener diode is always(a) forward-biased(b) connected in series(c) troubled by overheating(d) reverse-biased. The main reason … Read more
Objective Questions Short notes Objective questions (Answers are given below) The main purpose of modulation is to(a) combine two waves of different fre- quencies(b) achieve wave-shaping of the carrier wave(c) transmit low-frequency information overlong distances efficiently(d) produce sidebands. Demodulation(a) is performed at the transmitting station(b) removes side-bands(c) rectifies modulated signal(d) is opposite of modulation. In … Read more