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Azaan Academy of Sciences T12: Physics 12th

This document is a test paper for 12th-grade physics students at Azaan Academy of Sciences, consisting of multiple-choice questions and short answer questions related to electronic circuits and components. The paper includes questions on OR gates, op-amps, automatic streetlight functioning, and logic gates, among others. Students are required to attempt a total of 10 MCQs and 4 descriptive questions within a time limit of 1 hour.

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Adnan
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23 views1 page

Azaan Academy of Sciences T12: Physics 12th

This document is a test paper for 12th-grade physics students at Azaan Academy of Sciences, consisting of multiple-choice questions and short answer questions related to electronic circuits and components. The paper includes questions on OR gates, op-amps, automatic streetlight functioning, and logic gates, among others. Students are required to attempt a total of 10 MCQs and 4 descriptive questions within a time limit of 1 hour.

Uploaded by

Adnan
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Azaan Academy of Sciences T12

Physics 12th
Roll No.: ___________ Student Name: _______________________
Time Allowed: 1 Hour Total Marks: 30
Date: ___________ Section: ___________
Attempt the following MCQs (Marks 10)
No Question A B C D
1 The output of two inputs OR gate is 0 only Both inputs Either input Both inputs Either input
when its are 0 is 1 are 1 is 0
2 Gain of inverting op-amp in the R1=α and Α 1 0 -1
R2=0
3 The electronic circuit which gives the inversion AND GATE OR GATE XOR GATE NOT GATE
of input signal at the output is called
4 Automatic functioning of streetlight can be Inductor Capacitor Comparator Thermistor
done by the use of:
5 A NAND gate with two inputs A &B has an out A =0 B =0 Both A & B Both A & B
put 0, if are 0 are 1
6 The common door bell requires a voltage of 9 Volts 8 Volts 7 Volts 6Volts
about
7 The use of LDR is in the circuit of: Night switch rectifier oscillator logic gate
8 The gain of the non-inverting amplifier can be G=1-R₂/R₁ G=R₂/R₁-1 G= -R₂/R₁ G=1+R₂/R₁
expressed as
Low degree Low degree Low degree Light
9 LDR means resistor radiations rectification dependent
resistance
10 Find the gain if inverting, amplifier of external
resistance R1 = 10KΩ and R2 = 100K Ω -2 -5 -10 50
1. What is Boolean algebra ?
2. What is the biasing requirement of the junction of a transistor? For its normal operation? Explain how these
requirements are met in a common emitter amplifier?
3. LDR stands for ?
4. The inputs of a gate are 1 and o. identify the gate if its output is (a) 0 (b) 1?
5. Why a photo diode is operated in a reverse biased state?
6. What is open loop gain of an operational amplifier?
7. What is a logic gate ?
Attempt any 4 questions from the following. (4x9=36)
1. Draw the circuit diagram of inverting amplifier and label it. Evaluate a relation for its gain.
2. Draw the circuit diagram of non-inverting amplifier and label it. Evaluate a relation for its gain.

Test Paper Generator: App Developer: JAMSHED IQBAL

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