Q. No.The given circuit has two ideal diodes connected as shown in the figure below. The current flowing through the resistance R1 will be:
1.
2.5 A
2.
10.0 A
3.
1.43 A
4.
3.13 A
In the energy band diagram of a material shown below, the open circles and filled circles denote holes and electrons respectively. The material is a/an:
| 1. | p-type semiconductor |
| 2. | insulator |
| 3. | metal |
| 4. | n-type semiconductor |
The depletion layer in the P–N junction region is caused by:
| 1. | the drift of holes |
| 2. | diffusion of charge carriers |
| 3. | migration of impurity ions |
| 4. | drift of electrons |
The LED:
1. is reverse-biased.
2. is forward-biased.
3. can be made of GaAs.
4. both (2) & (3) are correct.
In a half-wave rectification, what is the output frequency if the input frequency is \(50\) Hz?
| 1. | \(50~\text{Hz}\) | 2. | \(100~\text{Hz}\) |
| 3. | \(25~\text{Hz}\) | 4. | \(60~\text{Hz}\) |
In the given circuit, the power developed in 2 k resistor is:
1. 36 mW
2. 12 mW
3. 144 mW
4. 72 mW
A Zener diode is used to obtain a constant voltage. If applied voltage \(\text V\) changes, then:
(\(\text V\) is more than Zener voltage)
| 1. | \(i_{1}\) and \(i_{2}\) change. |
| 2. | \(i_{2}\) and \(\text V_{0}\) change and \(i_{3}\) remains constant. |
| 3. | \(i_{2}\) and \(\text V_{0}\) don't change while \(i_{3}\) changes. |
| 4. | \(i_{3}\) and \(\text V_{0}\) don't change while \(i_{2}\) changes. |
Which of the following graphs may correctly represent the variation of current (l) with potential difference (V) across a zener diode?
| 1. |  |
2. |  |
| 3. |  |
4. |  |
What is the reading of the ideal ammeters A1 and A2 connected in the given circuit diagram, if junction diodes are ideal?
1. 2 A and zero
2. 3 A and 2 A
3. 2 A and 3 A
4. Zero and 2 A
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