In a common emitter (CE) amplifier having a voltage gain G, the transistor used has transconductance 0.03 mho and current gain 25. If the above transistor is replaced with another one with transconductance 0.02 mho and current gain 20, the voltage gain will be
A
$${1 \over 3}G$$
B
$${5 \over 4}G$$
C
$${2 \over 3}G$$
D
1.5G
2
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
To get an output Y= 1 in given circuit which of the following input will be correct ?
A
A $$ \to $$ 1, B $$ \to $$ 0, C $$ \to $$ 0
B
A $$ \to $$ 1, B $$ \to $$ 0, C $$ \to $$ 1
C
A $$ \to $$ 1, B $$ \to $$ 1, C $$ \to $$ 0
D
A $$ \to $$ 0, B $$ \to $$ 1, C $$ \to $$ 0
3
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The input resistance of a silicon transistor is 100 $$\Omega $$. Base current is changed by 40 $$\mu $$A which results in a change in collector current by 2 mA. This transistor is used as a common emitter amplifier with a load resistance of 4 k$$\Omega $$. The voltage gain of the amplifier is
A
2000
B
3000
C
4000
D
1000
4
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Two ideal diodes are connected to a battery as shown in the circuit. The current supplied by the battery is
