Physics lab Viva questions ( Newton's ring experiment, thevinion and Norton's theorem)
Viva questions on HIGH PASS FILTER
1) What is filter?
Answer : A filter is a circuit capable of passing certain frequencies while attenuating other frequencies.
2) what is high pass filter ?
Answer : A high-pass filter (HPF) is an electronic filter that passes signals with a frequency higher than a certain cutoff frequency and attenuated signals with frequencies lower than the cutoff frequency.
3) what is low pass filter?
Answer : A low-pass filter (LPF) is an electronic filter that passes signals with a frequency lower than a certain cutoff frequency and attenuated signals with frequencies higher than the cutoff frequency.
4) What is frequency ? write its SI unit
Answer : Number of cycles per unit to time is called frequency. and its SI unit is 'Hz' (hertz)
5) What is volt meter ? write its SI unit
Answer : An instrument for measuring electric potential in volts. and its SI unit is 'V' (volt)
6) What is Inductor ? write its SI unit
ans: a component in an electric or electronic circuit which possesses inductance. and its SI unit is 'Henry'
7) What is capacitor ? write its SI unit
ans : A device use store an electric charge is called capacitor. and its SI unit is 'Farad'
Viva questions on THEVINION AND NORTONS THEOREM
1) state Thevinions theorem
ans : Any two terminal linear circuit containing a large number of voltage and current sources and resistor can be replaced by a simple equivalent circuit containing a single voltage source in a series resistor.
2) Norton's theorem
ans : Any two terminal linear circuit containing a large number of voltage and current sources and resistor can be replaced by a simple equivalent circuit containing a single current source in a parallel resistor.
3) Norton's equivalent circuit
ans : Norton's equivalent circuit is a current generator which is placed in parallel to internal resistance.
4) State Ohms law
ans : The current through any conductor is directly proportional to the applied potential difference across it keeping physical conditions remains constant
5) Load resistance
ans : The terminal voltages also equals the voltage across the external resistance
6) Wheatstone Bridge
ans : A simple circuit for measuring an unknown resistance by connecting it so as to form a quadrilateral with three known resistance and applying a voltage between a pair of opposite corners
7) Kirchoff's voltage law
ans : The algebraic sum of all branch voltages around any closed loop of a network is zero
8) Kirchoff's current law
ans : The algebraic sum of current at any node of a circuit is zero then the sum of incoming current is equal to sum of out going current
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