The cause of potential barrier in a \(\mathrm{p\text-n}\) junction diode is:
1. Concentration of positive and negative ions near the junction.
2. Concentration of positive charges near the junction.
3. Depletion of negative charges near the junction.
4. Increment in concentration of holes and electrons near the junction.

Subtopic:  PN junction |
 67%
From NCERT
AIPMT - 1998
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Of the diodes shown in the following diagrams, which one of the diodes is reverse biased?
 

1. 2.
3. 4.

Subtopic:  PN junction |
 83%
From NCERT
AIPMT - 2004
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The truth table for the following network is:

1.
\(A\) \(B\) \(Y\)
\(0\) \(0\) \(0\)
\(0\) \(1\) \(0\)
\(1\) \(0\) \(0\)
\(1\) \(1\) \(1\)
2.
\(A\) \(B\) \(Y\)
\(0\) \(0\) \(0\)
\(0\) \(1\) \(1\)
\(1\) \(0\) \(1\)
\(1\) \(1\) \(0\)
3.
\(A\) \(B\) \(Y\)
\(0\) \(0\) \(1\)
\(0\) \(1\) \(0\)
\(1\) \(0\) \(0\)
\(1\) \(1\) \(1\)
4. None of the above
Subtopic:  Logic gates |
 76%
From NCERT
AIPMT - 1999
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Zener diode is used as:
1. Half-wave rectifier
2. Full-wave rectifier
3. AC voltage stabilizer
4. DC voltage stabilizer

Subtopic:  Applications of PN junction |
From NCERT
AIPMT - 1999
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The depletion layer has (for an unbiased \(\mathrm{p\text-n}\) junction):
1. electrons
2. holes
3. static ions
4. neutral atoms

Subtopic:  PN junction |
 64%
From NCERT
AIPMT - 1999
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

In semiconductors at room temperature:

1. The valence band is completely filled and the conduction band is partially filled.
2. The valence band is completely filled.
3. The conduction band is completely empty.
4. The valence band is partially empty and the conduction band is partially filled.
Subtopic:  Energy Band theory |
 70%
From NCERT
AIPMT - 2004
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The peak voltage in the output of a half-wave diode rectifier fed with a sinusoidal signal without a filter is \(10\) V. The DC component of the output voltage is:
1. \(\frac{10}{\pi }\) V
2. \(10\) V
3. \(\frac{20}{\pi }\) V
4. \(\frac{10}{\sqrt{2}}\) V

Subtopic:  Rectifier |
 51%
From NCERT
AIPMT - 2004
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

In a p–n junction photocell, the value of the photo electromotive force produced by monochromatic light is proportional to:

1. the intensity of the light falling on the cell.
2. the frequency of the light falling on the cell.
3. the voltage applied at the p–n junction.
4. the barrier voltage at the p–n junction.

Subtopic:  PN junction |
 60%
From NCERT
AIPMT - 2004
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The output of the OR gate is \(1\):

1. if either or both inputs are \(1.\)
2. only if both inputs are \(1.\)
3. if either input is zero
4. if both inputs are zero

Subtopic:  Logic gates |
 89%
From NCERT
AIPMT - 2004
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

What is the correct statement regarding a \(\mathrm{p\text-n}\) junction:
1. High potential at the \(\mathrm{n}\) side and low potential at the \(\mathrm{p}\) side.
2. High potential at the \(\mathrm{p}\) side and low potential at the \(\mathrm{n}\) side.
3. \(\mathrm{p}\) and \(\mathrm{n}\) both are at the same potential.
4. Undetermined.
Subtopic:  PN junction |
From NCERT
AIPMT - 2002
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch