In the figure given below, assuming the diodes to be ideal,
1. | D1 is forward biased and D2 is revers-biased and hence current flows from A to B. |
2. | D2 is forward biased and D1 is reverse-biased and hence no current flows from B to A and vice-versa. |
3. | D1 and D2 are both forward-biased and hence current flows from A to B. |
4. | D1 and D2 are both reverse-biased and hence no current flows from A to B and vice-versa. |
1. | an anti-particle of electron. |
2. | a vacancy created when an electron leaves a covalent bond. |
3. | absence of free electrons. |
4. | an artificially created particle. |
1. | would be zero at all times |
2. | would be like a half wave rectifier with positive cycles in output |
3. | would be like a half wave rectifier with negative cycles in output |
4. | would be like that of a full wave rectifier |
a. | electrons move from lower energy level to higher energy level in the conduction band |
b. | electrons move from higher energy level to lower energy level in the conduction band |
c. | holes in the valence band move from higher energy level to lower energy level |
d. | holes in the valence band move from lower energy level to higher energy level |
a. | there are no mobile charges |
b. | equal number of holes and electrons exist, making the region neutral |
c. | recombination of holes and electrons has taken place |
d. | immobile charged ions exist |
1. | the current and voltage across the Zener remain fixed. |
2. | the current through the series Resistance (Rs) changes. |
3. | the Zener resistance is constant. |
4. | the resistance offered by the Zener changes. |
1. | (a, b) |
2. | (b, d) |
3. | (b, c) |
4. | (c, d) |