1
JEE Main 2023 (Online) 24th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R

Assertion A : Photodiodes are preferably operated in reverse bias condition for light intensity measurement.

Reason R : The current in the forward bias is more than the current in the reverse bias for a $$p-n$$ junction diode.

In the light of the above statements, choose the correct answer from the options given below :

A
Both A and R are true and R is the correct explanation of A
B
A is false but R is true
C
A is true but R is false
D
Both A and R are true but R is NOT the correct explanation of A
2
JEE Main 2022 (Online) 28th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

An n.p.n transistor with current gain $$\beta=100$$ in common emitter configuration is shown in figure. The output voltage of the amplifier will be

JEE Main 2022 (Online) 28th July Evening Shift Physics - Semiconductor Question 51 English

A
0.1 V
B
1.0 V
C
10 V
D
100 V
3
JEE Main 2022 (Online) 28th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Identify the solar cell characteristics from the following options :

A
JEE Main 2022 (Online) 28th July Morning Shift Physics - Semiconductor Question 52 English Option 1
B
JEE Main 2022 (Online) 28th July Morning Shift Physics - Semiconductor Question 52 English Option 2
C
JEE Main 2022 (Online) 28th July Morning Shift Physics - Semiconductor Question 52 English Option 3
D
JEE Main 2022 (Online) 28th July Morning Shift Physics - Semiconductor Question 52 English Option 4
4
JEE Main 2022 (Online) 27th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

For a constant collector-emitter voltage of $$8 \mathrm{~V}$$, the collector current of a transistor reached to the value of $$6 \mathrm{~mA}$$ from $$4 \mathrm{~mA}$$, whereas base current changed from $$20 \,\mu \mathrm{A}$$ to $$25 \,\mu \mathrm{A}$$ value. If transistor is in active state, small signal current gain (current amplification factor) will be :

A
240
B
400
C
0.0025
D
200
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