If the reverse bias in a junction diode is changed from \(5\) V to \(15\) V then the value of current changes from \(38\) \(\mu \text{A}\) to \(88\) \(\mu \text{A}.\) The resistance of junction diode will be:
1. \(4\times10^{5}\) 
2. \(3\times10^{5}\)
3. \(2\times10^{5}\)
4. \(10^{6}\)

Subtopic:  PN junction |
 84%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The energy band diagrams for semiconductor samples of silicon are as shown. We can assert that:

          

1. sample X is undoped while samples Y and Z have been doped with a third group and a fifth group impurity respectively.
2. sample X is undoped while both samples Y and Z have been doped with a fifth group impurity.
3. sample X has been doped with equal amounts of third and fifth group impurities while samples Y and Z are undoped.
4. sample X is undoped while samples Y and Z have been doped with a fifth group and a third group impurity respectively.
Subtopic:  Energy Band theory |
 68%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

In a given circuit as shown the two input waveforms A and B are applied simultaneously. The resultant waveform Y is:

1. 2.
3. 4.
Subtopic:  Logic gates |
 79%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

advertisementadvertisement

In the circuit shown in the figure, the maximum output voltage Vo is:

     

1. 0 V

2. 5 V

3. 10 V

4. 52 V

Subtopic:  Rectifier |
Please attempt this question first.
Hints

In the circuit given below, if V(t) is the sinusoidal voltage source, then the voltage drop VAB(t) across the resistance R:

1. is half-wave rectified.
2. is full-wave rectified.
3. has the same peak value in the positive and negative half-cycles.
4. has different peak values during the positive and negative half-cycles.
Subtopic:  Rectifier |
Please attempt this question first.
Hints

A 2 V battery is connected across the points A and B as shown in the figure given below. Assuming that the resistance of each diode is zero in forward bias and infinity in reverse bias, the current supplied by the battery when its positive terminal is connected to A is:

      

1. 0.2 A 2. 0.4 A
3. Zero 4. 0.1 A
Subtopic:  PN junction |
 84%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

advertisementadvertisement

The logic behind the 'NOR' gate is that it gives:

1. High output when both the inputs are low.
2. Low output when both the inputs are low.
3. High output when both the inputs are high.
4. None of these

Subtopic:  Logic gates |
 86%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Zener breakdown will occur if:
1. impurity level is low.
2. impurity level is high.
3. impurity is less on the n-side.
4. impurity is less on the p-side.

Subtopic:  Applications of PN junction |
 75%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

An LED is constructed from a \(\mathrm{p\text{-}n}\) junction diode using \(\mathrm{GaAsP}\). The energy gap is \(1.9~\text{eV}\). The wavelength of the light emitted will be equal to:
1. \(10.4 \times 10^{-26} \text{m}\)
2. \(654~ \text{nm}\)
3. \(654~ \text{m}\)
4. \(654\times 10^{-11}~\text{m}\)

Subtopic:  Applications of PN junction |
 79%
From NCERT
NEET - 2019
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

advertisementadvertisement

A potential barrier of 0.50 V exists across a p-n junction. If the depletion region is 5.0×10-7 m wide, the intensity of the electric field in this region is:

1. \(1.0 \times 10^6 \mathrm{~V} / \mathrm{m}\) 2. \(1.0 \times 10^5 \mathrm{~V} / \mathrm{m}\)
3. \(2.0 \times 10^5 \mathrm{~V} / \mathrm{m}\) 4. \(2.0 \times 10^6 \mathrm{~V} / \mathrm{m}\)
Subtopic:  PN junction |
 82%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh