[{"id":119813,"question":"In describing functions of digital systems, a closed switch will be shown as","choices":[{"text":"0","value":"A"},{"text":"1","value":"B"},{"text":"low","value":"C"},{"text":"any one of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119812,"question":"Mathematical manipulation of the two quantized states can be best carried if they are represented by","choices":[{"text":"high - low","value":"A"},{"text":"yes - no","value":"B"},{"text":"on - off","value":"C"},{"text":"0 - 1","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":119811,"question":"A digital system deals with quantities or variables which have","choices":[{"text":"only one state","value":"A"},{"text":"only two discrete states","value":"B"},{"text":"three discrete states","value":"C"},{"text":"four discrete states","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119810,"question":"Most OP-AMP operates with","choices":[{"text":"<u>+</u> 6 V supply","value":"A"},{"text":"<u>+</u> 10 V supply","value":"B"},{"text":"<u>+</u> 12 V supply","value":"C"},{"text":"<u>+</u> 24 V supply","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119808,"question":"The R<sub>1</sub>= infinity and R<sub>2</sub>= 0, then the gain of non-inverting amplifier is","choices":[{"text":"zero","value":"A"},{"text":"infinity","value":"B"},{"text":"one","value":"C"},{"text":"any one of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119806,"question":"The closed loop gain of the non-inverting amplifier is given by","choices":[{"text":"G = R<sub>2</sub>/R<sub>1</sub>","value":"A"},{"text":"G = -R<sub>2</sub>/R<sub>1</sub>","value":"B"},{"text":"G = 1 - R<sub>2</sub>/R<sub>1</sub>","value":"C"},{"text":"G = 1 + T<sub>2</sub>/R<sub>1</sub>","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119805,"question":"The closed loop gain of the inverting amplifier is written as","choices":[{"text":"G = R<sub>2</sub>/R<sub>1</sub>","value":"A"},{"text":"G = 1 + R<sub>2</sub>/R<sub>1</sub>","value":"B"},{"text":"G = -R<sub>2</sub>/R<sub>1</sub>","value":"C"},{"text":"G = 1 - R<sub>2</sub>/R<sub>1</sub>","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119804,"question":"The open loop gain of OP-AMP is of the order of","choices":[{"text":"10<sup>2</sup>","value":"A"},{"text":"10<sup>3</sup>","value":"B"},{"text":"10<sup>4</sup>","value":"C"},{"text":"10<sup>5</sup>","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":119802,"question":"The value of output resistance of OP-AMOP is of the order of","choices":[{"text":"few ohms","value":"A"},{"text":"few hundred ohms","value":"B"},{"text":"several kilo ohms","value":"C"},{"text":"several mega ohms","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":119800,"question":"Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is","choices":[{"text":"zero","value":"A"},{"text":"small","value":"B"},{"text":"large","value":"C"},{"text":"very large","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":119799,"question":"The value of the input resistance of OP-AMP is of the order of","choices":[{"text":"few ohms","value":"A"},{"text":"few hundred ohms","value":"B"},{"text":"several kilo ohms","value":"C"},{"text":"several maga ohms","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":119798,"question":"The input resistance of the OP-AMP is the resistance between the","choices":[{"text":"(-) input and output","value":"A"},{"text":"(+) input and output","value":"B"},{"text":"(-) and (+) inputs","value":"C"},{"text":"between any inputs","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119797,"question":"A signal is amplified at the output without any change of phase, if it is applied at the","choices":[{"text":"inverting input","value":"A"},{"text":"non-inverting input","value":"B"},{"text":"at any of the input","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119796,"question":"A signal appears after amplification, at the output terminal with a phase shift of 180<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">° , if it is applied at</span>","choices":[{"text":"inverting input","value":"A"},{"text":"non-inverting input","value":"B"},{"text":"any one of the input terminal","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":119795,"question":"OP-AMP has the following input terminals","choices":[{"text":"one","value":"A"},{"text":"two","value":"B"},{"text":"three","value":"C"},{"text":"four","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119794,"question":"The amplifier which us used to perform mathematical operations electronically is known as","choices":[{"text":"calculator","value":"A"},{"text":"OP-AMP","value":"B"},{"text":"computer","value":"C"},{"text":"any one of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119792,"question":"When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the","choices":[{"text":"base and emitter","value":"A"},{"text":"collector and emitter","value":"B"},{"text":"base and collector","value":"C"},{"text":"any one of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119790,"question":"The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its","choices":[{"text":"I<sub>c</sub>will decrease","value":"A"},{"text":"V<sub>CE</sub>will increase","value":"B"},{"text":"I<sub>C</sub>will increase","value":"C"},{"text":"V<sub>CC</sub>will increase","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119788,"question":"When the emitter-base junction of a transistor is reverse biased, collector current","choices":[{"text":"Reverses","value":"A"},{"text":"Increases","value":"B"},{"text":"Decreases","value":"C"},{"text":"Stops","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119785,"question":"The value of current gain of n-p-n transistor is of the order of","choices":[{"text":"tens","value":"A"},{"text":"hundreds","value":"B"},{"text":"thousands","value":"C"},{"text":"ten thousands","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119784,"question":"For a n-p-n transistor, the conventional current equation can be written as","choices":[{"text":"I<sub>E</sub>+ I<sub>C</sub>= I<sub>B</sub>","value":"A"},{"text":"I<sub>C</sub>- I<sub>B</sub>= I<sub>E</sub>","value":"B"},{"text":"I<sub>C</sub>+ I<sub>B</sub>= I<sub>E</sub>","value":"C"},{"text":"I<sub>B</sub>+ I<sub>E</sub>= I<sub>C</sub>","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119781,"question":"In a normally biased n-p-n transistor, an electron c current I<sub>E</sub>flows from the","choices":[{"text":"emitter into the base","value":"A"},{"text":"collector into the base","value":"B"},{"text":"base into collector","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":119779,"question":"In n-p-n transistor, emitter base junction is kept","choices":[{"text":"reversed","value":"A"},{"text":"forward biased","value":"B"},{"text":"may be reversed or may be forward biased","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119777,"question":"For normal operation of transistor, the batteries","choices":[{"text":"V<sub>CC</sub>is of much lower value than V<sub>BB</sub>","value":"A"},{"text":"V<sub>CC</sub>is of much higher value than V<sub>BB</sub>","value":"B"},{"text":"V<sub>CC is equal to</sub>V<sub>BB</sub>","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119775,"question":"For the normal operation of the transistor, its","choices":[{"text":"emitter-base and collector base junctions are forward biased","value":"A"},{"text":"emitter-base junction is reversed biased and collector base junction is forward biased","value":"B"},{"text":"emitter-base junction is forward biased and collector-base junction is reverse biased","value":"C"},{"text":"any one of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119772,"question":"Which of the following has a great concentration of impurity","choices":[{"text":"base","value":"A"},{"text":"emitter","value":"B"},{"text":"collector","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119770,"question":"In a transistor, the central region is called","choices":[{"text":"collector","value":"A"},{"text":"emitter","value":"B"},{"text":"base","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119768,"question":"In a transistor, if the central region is n-type, then this type of transistor is known as","choices":[{"text":"n-p-n transistor","value":"A"},{"text":"p-n-p transistor","value":"B"},{"text":"either of these","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119765,"question":"A process is a reversible process, if the entropy of the system","choices":[{"text":"increases","value":"A"},{"text":"decreases","value":"B"},{"text":"remains constant","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119764,"question":"The disorder in the system increases due to the","choices":[{"text":"removal of heat","value":"A"},{"text":"addition of heat","value":"B"},{"text":"removal or addition of heat","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":2}]