Physics MSc

Q: Due to high value of input resistance of op-amp, the value of current flowing between two input terminals is practically

(a) :  Large
(b) :  Zero
(c) :  Very much large
(d) :  All are correct
(e) :  None is Correct
Answer:  Zero
Explanation:  

Q: A trough travelling in a denser medium is reflected from a rarer medium as ________ and thus phase difference of _______ takes place

(a) :  Trough, 0°
(b) :  Crest, 180°
(c) :  Crest, 0°
(d) :  Trough, 180°
(e) :  None of the Above
Answer:  Trough, 0°
Explanation:  

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