A Triac has three terminals viz ……………… Drain, source, gate Two main terminal and a gate terminal Cathode, anode, gate None of the above Ans : 2 2. A triac is equivalent to two SCRs ………….. In parallel In series In inverse-parallel None of the above Ans : 3 3. A triac is a ………….
A triac can pass a portion of …………… half-cycle through the load Only positive Only negative Both positive and negative None of the above Ans : 3 6. A diac has ………….. A triac has …………….. The device that does not have the gate terminal is ………………. A UJT has ………………. Two pn junctions One pn junction Three pn junctions None of the above Ans : 2 Integrated Circuits. Power Electronics. Regulated D. Power Supply. Solid-State Switching Circuits. Parallel Circuits. Transistor Tuned Amplifiers. Modulation And Demodulation.
The sensitivity factor of strain gauge is normally of the order of a 1 to 1. In wire wound strain gauges, the change in resistance is due to a Change in diameter of the wire b Change in length of the wire c Change in both length and diameter d Change in resistivity Ans : c. Bonded wire strain gauges are a Exclusively used for construction of transducers b Exclusively used for stress analysis c Used for both stress analysis and construction of transducer d Pressure measurement Ans : c.
Certain type of materials generates an electrostatic charge or voltage when mechanical force is applied across them. Such materials are called a Piezo-electric b Photo-electric c Thermo-electric d Photo-resistive Ans : a. Which of the following are piezo electric substances? Barium titanate 2. Lead titanate 3. Lead Zirconate 4. Cadmium and sulphate a 1,2 and 4 b 1,3and4 c 1,2and 3 d 2,3and 4 Ans : c.
Piezo-electric transducers are a Passive transducers b Inverse transducers c Digital transducers d Pulse transducers Ans : b. Piezo electric crystal can produce an emf a When external mechanical force is applied to i b When radiant energy stimulates the crystal c When external magnetic field is applied d When the junction of two such crystals are heated Ans : a.
The size of air cored transducers in comparison to the iron core parts is a Smaller b Larger c Same d Unpredictable Ans : b. Which of the following can be measured with the help of piezo electric crystal? S1: Transducer is a device which converts physical into electrical quantity S2: Transducer is also called as sensor. In a LVDT, the two secondary voltages a Are independent of the core position b Vary unequally depending on the core position c Vary equally depending on the core position d Are always in phase quadrature Ans : b.
Match the following 1. EEG A. Diagnostic tool for heart alignment 2. ECG B. Diagnostic tool for brain alignment 3. Sphygmo-manometer C. Instrument used for measuring blood pressure 4. Stethoscope D. The transducers which requires an external power and their output is a measure of some variation such as resistance, inductance, capacitance etc.
The principle of operation of variable resistance transducer is a Deformation leads to change in resistance b Displacement of a contact slider on a resistance c Coupling of two coils changes with displacement d Movement of magnetic field produces variation in resistance of material Ans : b.
Venturi is associated with a Venous blood pressure b Digital plethysmography c Dialysate flow in artificial kidney d Blood flow in heart lung machine Ans : d.
Pressure transducer for measuring blood pressure is a Strain gauge transducer only b Strain gauge or capacitive transducer c Resistive transducer d Fiber optic transducer Ans : b. In foil strain gauge the thickness of foil varies from a 2. Photo conductive cell consists of a thin film of a Quartz b Lithium sulphate c Barium titanate d Selenium Ans : d.
Integrated Circuits Operational Amplifiers Sir I want to improve my basic general knowledge in electronics and communication so …send me some vedios regarding about …it. Sir, Can you send me the interview of electronic questions and answers in. PDF format. I need them to build up my educational knowledge level up, for a Telecom interview.
Sir I wish to improve my basic knowledge level in electronics and communication field.
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