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

Questions asked in this paper

1. Q11 AND OR iv) None of these
2. Q2 magnetic field outside a solenoid is
3. Q1 uniform 11) non-uniform ill) zero iv) none of these
4. Q3 A proton. deuterium and alpha particle are accelerated through the same potential difference their kinetic energy will be in the ratio of
5. Q4 Diode can be used as
6. Q1 an oscillator a ill) Voltage regulator iv) an amplifier
7. Q5 energy is stored in
8. Q1 medium field ill) charge iv) all of these
9. Q6 The universal gate is il) AND li) NAND iv) EX-OR Answer in one sentence. (3M) ) Define magnetic field and state its unit. ‘
10. Q2 What is Zener
11. Q3 Electric potential and state its unit the blanks. (SM) ) Rectifier is a device which
12. Q2 The potential is constant in a certain region of space. The value of E in that region
13. Q3 For a solenoid of finite length, the magnetic field inside it is uniform, except near the ends, which midpoint value of magnetic field
14. Q4 The of electric field intensity E is such that an electron placed in it would experience an electric force equal to its weight is OY
15. Q2 A. Attempt ANY ONE. (8M)
16. Q1 Analternating e.m.f. wt is applied to a resistance R and inductance L in series What will be the impedance. the current and the phase difference between applied e.m.f. and What is an A.C bridge? Obtain the conditions required to balance an A.C bridge Attempt ANY ONE. (8M)
    • i) Derive an expression for resonant frequency for parallel LCR circuit. Why is it called a
    • ii) Find the conditions of balance for Wien Bridge. How would you determine the frequency of the supply?
    • C. Attempt ANY ONE. (4M) In a De Sauty’s bridge, the balance condition is obtained when Ro =1200Q and Find the value of the other capacitor
    • ii) Find the reactance of capacitor of capacitance 0.1 and frequency
17. Q3 A. Attempt ANY ONE. (8M)
    • i) State Thevenin’s theorem and write basic steps for solving a network using it
    • ii) What is rectifier? Explain with neat diagram the working of half wave rectifier
    • B. Attempt ANY ONE. (8M)
    • i) State and explain De-Morgan’s theorem using NAND gates also tabulate its truth table State superposition theorem and write basic steps for solving a network using it
    • C. Attempt ANY ONE. (4M)
    • i) Explain half adder and write its truth table Find the value of series resistance connected in series with 6V zener diode produces mA zener current when connected to 20 volt input supply
18. Q4 A. Attempt ANY ONE. (8M)
    • i) Show that energy stored in continuous charge distribution is, W= f
    • ii) Find the magnetic field due to a long solenoid by using Biot-Savart’s law Attempt ANY ONE, (SM) What is electric potential? Show that electric field intensity between any two points A and 13 depends only on the position of these points and is independent of the actual path followed
    • ii) What are the Helmholtz coils? Find an expression for the magnetic field at the mid-point of the line joining the centres of Helmholtz coil
    • C. ANY ONE. (4M)
    • i) A straight long conductor carries a current of 10 A. Calculate ihe magnetic field ata distance 10 em from the conductor Calculate the force between two charges of each separated by | min vacuum
19. Q5 A. Attempt ANY FOUR. (20M)
    • i) What are the limitations of Coulomb’s law? li) The electric potential V at any point in space is given by volt. Calculate electric intensity at the point iil) A wire is shaped to form a regular hexagon of side If a current I flows through the wire calculate the magnetic field at the centre of the hexagon value of Ry and the frequency of the applied voltage required to balance the bridge coil of 20 Q resistance has an inductance of H is connected in parallel with a condenser of 100 capacitance. Calculate the resonant frequency Vi) Obtain the condition of balance for Hay’s and obtain the expression for upknown

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