CBSE 12th Standard Physics Subject Semiconductor Electronics Materials Devices And Simple Circuits HOT Questions 3 Mark Questions 2021
QB365 Provides the HOT Question Papers for Class 12 Physics, and also provide the detail solution for each and every HOT Questions. HOT Questions will help to get more idea about question pattern in every exams and also will help to get more marks in Exams
QB365 - Question Bank Software
CBSE 12th Standard Physics Subject Semiconductor Electronics Materials Devices And Simple Circuits HOT Questions 3 Mark Questions 2021
12th Standard CBSE
-
Reg.No. :
Physics
-
The input resistance of a silicon transistor is \(665\Omega \). Its base current is changed by \(15\ \mu A\) which results in the change in collector current by 2 mA. This transistor is used as a common emitter amplifier with a load resistance of \(5 \ k\Omega \). Calculate
(a) current gain, \(\beta _{ ac }\) ;
(b) transconductance \(g_{ m }\) and
(c) voltage gain \(A_{ v }\) of the amplifier. -
As we know that an n-type semiconductor has large number of electrons but it is still electrically neutral. Why?
-
How would you set up a circuit to obtain NOT gate using a transistor?
-
A circuit symbol of a logic gate and two input wave forms A and B are shown.
a) Name the logic gate
b) Give the output wave form
.JPG)
-
The diode shown in the figure has a constant voltage drop of 0.5V at all currents and a maximum power rating of 100mW. What should be the value of resistance R connected in series, for maximum current.?
