Objective Questions Short notes Objective questions (Answers are given below) An electronic oscillator is(a) just like an alternator(b) nothing but an amplifier(c) an amplifier with feedback(d) a converter of ac to dc energy. The frequency of oscillation of an elementaryLC oscillatory circuit depends on(a) coil resistance(b) coil inductance(c) capacitance(d) both (b) and (c). For sustaining … Read more
Objective Questions Short notes Objective questions (Answers are given below) A unijunction transistor has(a) anode, cathode and a gate(b) two bases and one emitter(c) two anodes and one gate(d) anode, cathode and two gates. Which semiconductor device acts like a diodeand two resistors ?(a) SCR (b) triac(c) diac (d) UJT. A UJT has RBB = … Read more
Objective Questions Short notes Objective questions (Answers are given below) A FET consists of a(a) source (b) drain(c) gate (d) all of the above. FETs have similar properties to(a) PNP transistors(b) NPN transistors(c) thermonic valves(d) unijunction transistors. For small values of drain-to-source voltage,JFET behaves like a(a) resistor(b) constant-current source(c) constant-voltage source(d) negative resistance In a … Read more
Objective Questions Short notes Objective questions (Answers are given below) The advantage of using negative feedback in anamplifier is that its gain can be made practicallyindependent of(a) temperature changes(b) age of components(c) frequency(d) all of the above Feedback in an amplifier always helps to(a) control its output(b) increase its gain(c) decrease its input impedance(d) stabilize … Read more
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