9th Class Physics Textbook State Syllabus. We covered all the 9th Class Physics Textbook State Syllabus MCQs in this post for free so that you can practice well for the exam.
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9th Class Physics Textbook State Syllabus Objective for Students
In a bipolar junction transistor,
(a) all three regions (the emitter, the base, and the collector) have equal concentrations of impurity.
(b) the emitter has the least concentration of impurity.
(c) the collector has the least concentration of impurity.
(d) the base has the least concentration of impurity.
Option d – the base has the least concentration of impurity
Integrated circuits are made up of which of the following?
(a) Aluminium
(b) Silicon
(c) Glass
(d) Iron
Option b – Silicon
Digital circuits are used in
(a) electronic watches
(b) washing machines
(c) TV noise
(d) All of the above
Option d – All of the above
The term LASER stands for
(a) Light Amplification by Stimulated Emission of Radiation
(b) Light Amplification by Spontaneous Emission of Radiation
(c) Light Amplification by Stimulated Emission of Rays
(d) Light Amplification by Stimulated Energy of Radiation
Option a – Light Amplification by Stimulated Emission of Radiation
We covered all the 9th class physics textbook state syllabus mcqs above in this post for free so that you can practice well for the exam.
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