PPSC Physics Full Book With Answers

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PPSC Physics Full Book

Sr. # Questions Answers Choice
1 The resistance between(+) and (-) inputs of an amplifier is. Zero Low High Infinity
2 An operational amplifier have how many input terminals. One Two Three Four
3 When transistor works as an amplifier, its output is. More Less Zero Directly proportional to the input
4 A complete amplifier circuit made on a silicon chip and enclosed in a small capsule is Inductor Metal detector Diode Operational amplifier
5 Transistors with various combinations are widely used as switches in. electric generators Rectificers Amplifiers Computers
6 The SI unit of current gain is. Ampere Ampere metre Ampere volt It has no unit
7 What is the basic advantage of class A operation of an amplifier. It has high efficiency It has high gain It has low distortion It has high distortion
8 Which of the following is the most commonly used regions of operations for a transistor. Cut off Saturation Active All of these
9 Which of the following is basic transistor configuration. CB CC CE All of these
10 In CC configuration voltage gain is. Less than one More than one One Zero
11 In CE amplifier phased reversal occurs when the output voltage is taken between Base and collector Base and emitter Collector and emitter None of the terminals
12 If the base emitter junction is forward biased and base collector junction is reverse biased the BJT is in. cut of mode Amplification mode Saturation mode Inversion mode
13 The decimal equivalent of 1111 is 5 10 15 120
14 The binary equivalent of 25 is 111001 11001 1001 10101
15 An AND gate is. Equivalent to a series switching circuit. Equivalent to a parallel switching circuit Equivalent ot universal gate A reciprocal of NAND gate
16 The output of two input OR gate is zero only when its. Either input is one Either input is zero Both inputs are zero Both inputs are one
17 NOR gate is a combination of. OR gate and NOT gate OR gate and AND gate OR gate and OR gate NOT gate and AND gate
18 If we use two diodes and a centre tapped transformer we eill get Transistor Amplifier Half wave rectifier Full wave rectifier
19 A transistor can be used as Oscillator Amplifier Switch Both a and c
20 For the normal operation of transistor the emitter base junction is always. Zero biased Reverse biased Forward bised Both a and b
21 A transistor consists of. One p-n junction Two p-n junctions Three p-n junctions Four p-n junction
22 Which one among these contacts in a transistor is non rectifying. Base Emitter Collector None of these
23 In a transistor which one is very thin. Collector Emitter Base Depletion region
24 In n-p-n transistor the current flows in the direction from Emitter to base emitter to collector Base to emitter Base to collector
25 An active component of an electronic circuit consisting of a small block of semiconducting material to which at least three electrical contacts are made is known as. Rectifier Amplifier Thermocouple Transistor
26 At room temperature the potential difference between the two sides of depletion region for silicon is of the order of. 0.3 v 0.5 V 0.7 V 0.9 V
27 Base current of a transistor is 1 mA and collector current is 99 mA What is emitter current. 1 mA 100 mA 98 mA 110 mA
28 Which of the following circuits is used as local oscillator in radio receivers. AF oscillator Phase Local Loop RF oscillator All of the above
29 Ebers-Moll model describes the working of a BJT FET MOSFET UJT
30 Which one of the following gates in a a universal gate. OR AND NOT NAND
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