Question 1 : Which of the below mentioned statements is false regarding Schottky diodes?
1. Schottky diodes have a Al-Silicon junction
2. There is no storage of charges in a Schottky diode
3. The majority charge carriers in a Schottky diode are holes
4. Schottky diodes can be switched off faster than a p-n junction diode of the same rating
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Question 2 : Which of the following is true in case of a forward biased p-n junction diode?
1. The positive terminal of the battery sucks electrons from the p-region
2. The positive terminal of the battery injects electrons into the p-region
3. The negative terminal of the battery sucks electrons from the p-region
4. None of the above mentioned statements are true
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Question 3 : Which of the below mentioned statements is false regarding a p-n junction diode?
1. Diode are uncontrolled devices
2. Diodes are rectifying devices
3. Diodes are unidirectional devices
4. Diodes have three terminals
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Question 4 : If the doping levels of the semiconductor is increased, then the width of the depletion layer
1. increases
2. decreases
3. is unchanged
4. keeps oscillating
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Question 5 : Which of the following is true in case of an unbiased p-n junction diode?
1. Diffusion does not take place
2. Diffusion of electrons & holes goes on infinitely
3. There is zero electrical potential across the junctions
4. Charges establish an electric field across the junctions
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Question 6 : If V & I are the forward voltage & current respectively, then the power loss across the diode would be
1. V/I
2. V² I²
3. I² V
4. VI
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Question 7 : When the p-n junction diode is reversed biased, the width of the depletion region __________
1. increases
2. decreases
3. remains Constant
4. none of the above mentioned
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Question 8 : A p-type semiconductor material is doped with ____________ impurities whereas a n-type semiconductor material is doped with __________ impurities
1. acceptor, donor
2. acceptor, acceptor
3. donor, donor
4. donor, acceptor
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Question 9 : When reverse breakdown occurs in a diode
1. voltage increases & current is constant
2. voltage increases & current also increases
3. both are constant
4. voltage is constant & current increases
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Question 10 : The V-I Characteristics of the diode lie in the
1. 1st & 2nd quadrant
2. 1st & 3rd quadrant
3. 1st & 4th quadrant
4. Only in the 1st quadrant
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