1
JEE Main 2019 (Online) 10th April Evening Slot
+4
-1
The figure represents a voltage regulator circuit using a Zener diode. The breakdown voltage of the Zener diode is 6 V and the load resistance is, RL = 4k$$\Omega$$. The series resistance of the circuit is Ri = 1 k$$\Omega$$. If the battery voltage VB varies from 8 V to 16 V, what are the minimum and maximum values of the current through Zener diode?
A
0.5 mA; 8.5 mA
B
1.5 mA; 8.5 mA
C
1 mA; 8.5 mA
D
0.5 mA; 6 mA
2
JEE Main 2019 (Online) 10th April Morning Slot
+4
-1
Out of Syllabus
An n-p-n transistor operates as a common emitter amplifier, with a power gain of 60 dB. The input circuit resistance is 100$$\Omega$$ and the output load resistance is 10 k$$\Omega$$. The common emitter current gain $$\beta$$ is :
A
104
B
102
C
6 × 102
D
60
3
JEE Main 2019 (Online) 9th April Evening Slot
+4
-1
The logic gate equivalent to the given logic circuit is :-
A
NAND
B
AND
C
NOR
D
OR
4
JEE Main 2019 (Online) 9th April Morning Slot
+4
-1
Out of Syllabus
An NPN transistor is used in common emitter configuration as an amplifier with 1 k$$\Omega$$ load resistance. Signal voltage of 10 mV is applied across the base-emitter. This produces a 3 mA change in the collector current and 15μA change in the base current of the amplifier. The input resistance and voltage gain are :
A
0.67 kW, 200
B
0.33 kW, 1.5
C
0.67 kW, 300
D
0.33 kW, 300
EXAM MAP
Medical
NEET