1
JEE Main 2019 (Online) 9th January Morning Slot
+4
-1
Mobility of electrons in a semiconductor is defined as the ratio of their drift velocity to the applied electric field. If, for an n-type semiconductor, the density of electrons is 1019 m$$-$$3 and their mobility is 1.6 m2/(V.s) then the resistivity of the semiconductor (since it is an n-type semiconductor contribution of holes is ignored) is close to :
A
$$2\,\Omega$$m
B
4$$\,\Omega$$m
C
0.4 $$\,\Omega$$m
D
0.2 $$\,\Omega$$m
2
JEE Main 2018 (Online) 16th April Morning Slot
+4
-1
In the given circuit, the current through zener diode is :

A
5.5 mA
B
6.7 mA
C
2.5 mA
D
3.3 mA
3
JEE Main 2018 (Offline)
+4
-1
The reading of the ammeter for a silicon diode in the given circuit is :
A
13.5 mA
B
0
C
15 mA
D
11.5 mA
4
JEE Main 2018 (Online) 15th April Evening Slot
+4
-1
Truth table for the following digital circuit will be :
A
B
C
D
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