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
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
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. |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The combination of gates shown in the diagram is equivalent to:
1. OR
2. AND
3. NAND
4. NOT
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
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. |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
In the given circuit, the power developed in 2 k resistor is:
1. 36 mW
2. 12 mW
3. 144 mW
4. 72 mW
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The LED:
1. is reverse-biased.
2. is forward-biased.
3. can be made of GaAs.
4. both (2) & (3) are correct.
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
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 |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
A Zener diode is shown in the following circuit diagram. When the source voltage fluctuates such that , then:
1. all the current I1, I2 and I3 change.
2. only I1 and I2 change and I3 remains constant.
3. only I1 and I3 change and I2 remains constant.
4. all the currents remain constant.
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
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 |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
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 |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.