1
JEE Main 2019 (Online) 10th January Evening Slot
+4
-1
For the circuit shown below, the current through the Zener diode is -

A
5 mA
B
zero
C
14 mA
D
9 mA
2
JEE Main 2019 (Online) 10th January Morning Slot
+4
-1
To get output 1 at R, for the given logic gate circuit the input values must be

A
x = 0,  y = 0
B
x = 1,  y = 0
C
x = 0,  y = 1
D
x = 1,  y = 1
3
JEE Main 2019 (Online) 9th January Evening Slot
+4
-1
Ge and Si diodes start conducting at 0.3 V and 0.7 V respectively. In the following figure if Ge diode connection are reversed, the value of V0 changes by : (assume that the Ge diode has large breakdown voltage)

A
0.8 V
B
0.6 V
C
0.2 V
D
0.4 V
4
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
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