1
MCQ (Single Correct Answer)

AIPMT 2014

The given graph represents V-I characteristic for a semiconductor device.



Which of the following statement is correct ?
A
It is V-I characteristic for solar cell where, point A represents open circuit voltage and point B short circuit current.
B
It is for a solar cell and popints A and B represent open circuit voltage and current, respectively.
C
It is for a photodiode and points A and B represent open circuit voltage and current, respectively.
D
It is for a LED and points A and B represent open circuit voltage and short circuit current, respectively.

Explanation

The V-I characteristic for a solar cell is as shown the figure.
2
MCQ (Single Correct Answer)

NEET 2013 (Karnataka)

One way in which the operation of a n-p-n transistor differs from that of a p-n-p
A
The emitter junction injects minority carries into the base region of the p-n-p
B
The emitter injects holes into the base of the p-n-p and electrons into the base region of n-p-n
C
The emitter injects holes into the base of n-p-n
D
The emitter junction is reversed biased in n-p-n

Explanation

In p-n-p transistor holes are injected into the base while electrons are injected into the base of n-p-n transistor. Emitter-base junction is forward biased.
3
MCQ (Single Correct Answer)

NEET 2013 (Karnataka)

In an unbiased p-n junction, holes diffuse from the p-region to n-region because of
A
The attraction of free electrons of n-region.
B
The higher hole concentration in p-region than that in n-region.
C
The higher concentration of electrons in the n-region than that in the p-region.
D
The potential difference across the p-n junction.

Explanation

The higher hole concentration is in p-region than that in n-region.
4
MCQ (Single Correct Answer)

NEET 2013

The output (X) of the logic circuit shown ion figure will be

A
X = A . B
B
X = $$\overline {A + B} $$
C
X = $$\overline {\overline A } .\overline {\overline B } $$
D
X = $$\overline {A.B} $$

Explanation

The output of the given logic circuit is

X = $$\overline{\overline {A.B}} $$ = A.B

EXAM MAP

Joint Entrance Examination

JEE Advanced JEE Main

Graduate Aptitude Test in Engineering

GATE CE GATE ECE GATE ME GATE IN GATE EE GATE CSE GATE PI

Medical

NEET

CBSE

Class 12