Question 31 : A diode is said to be reversed biased when the
1. cathode is positive with respect to the anode
2. anode is positive with respect to the cathode
3. cathode is negative with respect to the anode
4. both cathode & anode are negative
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Question 32 : Power diode is __________
1. a three terminal semiconductor device
2. a two terminal semiconductor device
3. a four terminal semiconductor device
4. a three terminal analog device
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Question 33 : As compared to a p-n junction device of equal rating, the Schottky diode has
1. lower reverse voltage rating
2. lower reverse leakage current
3. higher Switching time
4. higher cut-in voltage
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Question 34 : A Schottky diode has __________
1. a gate terminal
2. aluminum-silicon junction
3. platinum gold junction
4. germanium-Arsenide junction
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Question 35 : To make a signal diode suitable for high current & high voltage carrying applications with minimum losses, ________
1. a lightly doped n layer is grown between the two p & n layers
2. a heavily doped n layer is grown between the two p & n layers
3. a lightly doped p layer is grown between the two p & n layers
4. a heavily doped p layer is grown between the two p & n layers
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Question 36 : Lets assume that the doping density in the p-region is 10^-9 cm^-3 & in the n-region is 10^-17cm^-3, as such the p-n junction so formed would be termed as a
1. p^– n^–
2. p⁺ n^–
3. p^– n⁺
4. p⁺ n⁺
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Question 37 : When the p-n junction diode is forward biased, the width of the depletion region __________
1. increases
2. decreases
3. remains Constant
4. increases than Decreases
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Question 38 : Ideally the voltage drop across a conducting diode must be
1. ∞
2. 0
3. higher than the forward biased voltage
4. equal to the forward biased voltage
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Question 39 : In a certain power electronics application, it is required that the voltage at the load terminals is to be kept within a certain range of voltages only. Among the device listed below, which would be the most ideal choice for this application?
1. P-n junction diode
2. Schottky diode
3. Zener diode
4. Fast recover diode
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Question 40 : The p-region has a greater concentration of __________ as compared to the n-region in a P-N junction.
1. holes
2. electrons
3. both holes & electrons
4. phonons
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