1
JEE Main 2017 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The current gain of a common emitter amplifier is 69. If the emitter current is 7.0 mA, collector current is :
A
9.6 mA
B
6.9 mA
C
0.69 mA
D
69 mA
2
JEE Main 2017 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
What is the conductivity of a semiconductor sale having electron concentration of $$5 \times {10^{18}}\,\,{m^{ - 3}},$$ hole concentration of $$5 \times {10^{19}}\,\,{m^{ - 3}},$$ electron mobility of 2.0 m2 V$$-$$1 s-1 and hole mobility of 0.01 m2 V$$-$$1 s$$-$$1 ?

(Take charge of electronas 1.6 $$ \times $$ 10 $$-$$19 c)
A
1.68 ($$\Omega $$-m)$$-$$1
B
1.83 ($$\Omega $$-m)$$-$$1
C
0.59 ($$\Omega $$-m)$$-$$1
D
1.20 ($$\Omega $$-m)$$-$$1
3
JEE Main 2017 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The V-I characteristic of a diode is shown in the figure. The ratio of forward to reverse bias resistance is :

JEE Main 2017 (Online) 8th April Morning Slot Physics - Semiconductor Question 163 English
A
10
B
10$$-$$6
C
106
D
100
4
JEE Main 2017 (Offline)
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
In a common emitter amplifier circuit using an n-p-n transistor, the phase difference between the input and the output voltages will be:
A
180°
B
45°
C
90°
D
135°
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