BSc Physics SEM II ATKT 2016-17 ATKT PHYSICS I Question Paper - Mumbai University | munotes

Questions asked in this paper

1. Q1 A) any one. 8 marks
   • a) What is time constant of an L-R series circuit? Derive a1 expression for it by considering decay of current in an L-R circuit
   • b) State superposition theorem it with suitable sample .State its Prerequisites
2. Q1 B) one. 7 marks
   • a) State and explain maximum power transfer theorem
   • b) Derive an expression for charging of capacitor in C-R circuit
3. Q1 C) Attempt any one. 5 marks
   • a) State Constant current source and explain in brief of capacity 0.5 discharge through a resistance of | .Find the time taken the charge to reduce to 50% of its initial value
4. Q2 A) Attemptiany one. Marks]
   • a) A voltage is applied across a series L-R combination .Calculate the for the current ugh the circuit
   • b) What is bridge? State its applications. Obtain the conditions required to balance an AC
5. Q2 B) Attempt any one. 7 marks
   • a) Draw LCR circuit. Derive an expression for the resonance
   • b) Show how to measure the inductance of coil using Maxwell’s inductance bridge
6. Q2 C) Atte anyone. | . 5 marks
   • a) An Ac source specified as is connected across 500 Q Calculate the rms emf ahd of the source. Also calculate the rms current thought the circuit
   • b) De sauty’s capacitance bridge as C, =0.47 pF, Ra= 1200Q and Ry =800Q.Find the value of the other capacitancd when the bridge is balanced
   • A) Attempt any ohe. nence find its relatioh with Define the current amplification factor for CE configuration amplification factor in CB configuration
   • b) What is ri Obtai full wave rectifier 'S ripple factor? Obtain the expression for fu 7 marks]
7. Q3 B) Attempt any one, b 1
   • a) Explain NAND anid NOR gates with the help of their logic s and logic diagram. drawn f Explain the input output characteristics of CB configuration. State the conc
8. Q3 C) Attempt any one, What is EX-OR gate? What is the difference between intlusive OR gate and e
   • b) A 400 mW zener diode with breakdown voltage SV as ine carry current its can carry. What is the current limiting resistor for this ze maximum current if the supply voltage V?
9. Q4 Attempt any three. =
   • a) State the following theorems An inductance of 4 Henry and a resistance of 1 Q are in series with source of ‘6V emf. Calculate current in the Circuit 4 sec after it is switched on LCR L=400 R= 100 and C= .Find the resonant for the ‘circuit .Also, Find the —factor at resonance, pF, ind the value of R3 and frequency of the applied voltage required to ‘balance the bridge Calculate the emitter current in CE , transistor configuration for which B=100 and

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