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ECIL GET 2017 Recruitment: Electronics (Analog Circuits) Quiz 12
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Question 1
In 555-timer circuit, if output is low then current will flow through device and switch it on. It is a case of:
Question 2
In the case of small BJT model with common emitter, the collector current ic is 1.3 mA, when the collector-emitter voltage is vce of 2.6 V. The output conductance of the circuit is :
Question 3
For smooth and reliable operation of an amplifier using BJT, it is necessary that the circuit must be properly designed from the point of view of bias stabilization, because.
1) Reverse saturation current ICO increases with rise in temperature.
2) VBE decreases with rise in temperature.
3) hFE or β changes with change of temperature and replacement of the transistor.
4) hFE or β changes with change in collector supply voltage.
Which of these statements are correct?
1) Reverse saturation current ICO increases with rise in temperature.
2) VBE decreases with rise in temperature.
3) hFE or β changes with change of temperature and replacement of the transistor.
4) hFE or β changes with change in collector supply voltage.
Which of these statements are correct?
Question 4
The Slew rate(S.R.) is the rate of change of output voltage of an operational amplifier when a particular input is applied. CONSIDER THE FOLLOWING FOR SINUSOIDAL INPUT: S.R. DEPENDS ON
Question 5
Consider the following statements regarding optocouplers:
1) Optocouplers are LEDs driving photodiodes in a single package to provide electrical isolation between input and output
2) Optocoupler is LED driving a phototransistor in a single package that replaces pulse transformers working at input zero crossing
3) Optocouplers are used as temporary non-fixed joints between optical fibre terminations Which of the above statements are correct?
1) Optocouplers are LEDs driving photodiodes in a single package to provide electrical isolation between input and output
2) Optocoupler is LED driving a phototransistor in a single package that replaces pulse transformers working at input zero crossing
3) Optocouplers are used as temporary non-fixed joints between optical fibre terminations Which of the above statements are correct?
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Mar 13ESE & GATE EC
