Electronic Devices and Circuits Questions and Answers – Rect

Which of the following isn’t a type of rectifier?

• Precision Half-wave Rectifier

• Bridge Rectifier

• Peak Rectifier

• None of the mentioned

For a half wave or full wave rectifier the Peak Inverse Voltage of the rectifier is always

• Greater than the input voltage

• Smaller than the input voltage

• Equal to the input voltage

• Greater than the input voltage for full wave rectifier and smaller for the half wave rectifier

Bridge rectifier is an alternative for

• Full wave rectifier

• Peak rectifier

• Half wave rectifier

• None of the mentioned

Which of the following is true for a bridge rectifier?

• The peak inverse voltage or PIV for the bridge rectifier is lower when compared to an identical center tapped rectifier

• The output voltage for the center tapped rectifier is lower than the identical bridge rectifier

• A transistor of higher number of coil is required for center tapped rectifier than the identical bridge rectifier

• All of the mentioned

The diode rectifier works well enough if the supply voltage is much than greater than 0.7V. For smaller voltage (of few hundreds of millivolt) input which of the following can be used?

• Superdiode

• Peak rectifier

• Precision rectifier

• None of the mentioned

A simple diode rectifier has ‘ripples’ in the output wave which makes it unsuitable as a DC source. To overcome this one can use

• A capacitor in series with a the load resistance

• A capacitor in parallel to the load resistance

• Both of the mentioned situations will work

• None of the mentioned situations will work

Zener diodes are also known as

• Voltage regulators

• Forward bias diode

• Breakdown diode

• None of the mentioned

Which of the following is true about the resistance of a Zener diode?

• It has an incremental resistance

• It has dynamic resistance

• The value of the resistance is the inverse of the slope of the i-v characteristics of the Zener diode

• All of the mentioned

Which of the following is true about the temperature coefficient or TC of the Zener diode?

• For Zener voltage less than 5V, TC is negative

• For Zener voltage around 5V, TC can be made zero

• For higher values of Zener voltage, TC is positive

• All of the mentioned

Which of the following can be used in series with a Zener diode so that combination has almost zero temperature coefficient?

• Diode

• transistor

• resistor

• MOSFET