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1. WHEN IS THE ENERGY CONSERVED?
   HOW TO FIND THE WORK DONE BY VARIOUS FORCES ACTING ON A BODY?
2. Is a component of a vector greater than its own magnitude?
   A cross product b dot product c gives what a scalar quantity or a vector quantity?
3. explain capacitor filter
4. why nuclear fusion is not done for liberating the energy as in stars it occurs itself.
5. Why a tuning fork has two prongs? What are the conditions for resonance of air column with a tuning fork?
6. The density of a rod varies as d = 10 – 5x. The length of the rod is 1m. Find its moment of inertia about an axis passing through one of the ends ( x = 0 ).
7. Is friction more between 2 smooth surfaces or between a smooth and rough surface?
8. A non conducting sphere has a uniform charge density ℓ. A spherical cavity is hollowed out of the sphere. Using superposition concepts, show that the electric field at all points witih the cavity is uniform and equal to E₌ ℓa/3€, where a is the position vector from the centre of the sphere to the centre of cavity.
9. how many states are possible for mater?
10. why AC is always appears in multiple of 11V?
11. What is the meaning of prefix in physics
12. distinguish between short sightedness and long sightedness
13. Explain Diffraction using Huygen's principle?
14. A wire is stretched two times its length .find the resistance and resistivity of new wire.
15. what is ment by mechanics
16. IS KIRCHOFF IS APPLICABLE TO FOR BOTH DC AND AC CURRENT
17. two stereo speakers are seperated by a distance of 2.40mts .a person stands at a distance of 3.20mts in front of one oh the speakers.find the frequencies in audible range for which the listener will hear a minimum sound intensity.speed of sound in air=320m/sec
18. Can i know what will be the graph that showing the distribution of kinetic energy of eletrons emitted during beeta decay
19. When a stone is dropped into a well, the splash of water is heard after 3.91 sec.If the depth of the well is 67.6m, find the velocity of sound?(g=9.8ms^2)
20. What is the exact difference between E.M.F. and Voltage of a circuit. Both of 'em have exaclty same SI unit i.e. V (volt).
21. when a stone dropped into a well the spalsh of water is heard after 3.9sec. If the depth of the well is 67.7m. Find the velocity of the sound?
22. There is a block of Mass M lying on a floor having coeff of friction k2. A pulley is attached to its top right corner.A mass m is tied and is vertically down against the surface of M by a string from the top pulley. The string is interconnected to another pulley through the top pulley which is at the same level as the top pulley.the string is then allowed to run vertically down through another pulley and finally joins the mass M running parallel to the floor. There is friction betweem mass m and M where coeff of friction is k1. FInd the accelaration of Mass M.
23. what is an ideal dipole?
24. HOW TO CONVERT A GALVANOMETER INTO A AMMETER AND A VOLTMETER?
25. explain in detail how a transistor can be used as an amplifier?
26. how does silencer of a pistol or revolver work?
27. the time required for a 50 Hz sinusoidal ac to change its value from zeroto the rms value
    1. 0.015
    2. 0.025
    3. 0.1
    4. 0.000001 sec.
28. In a circuit L,C & R are connected in parallel . At any instant current through inductor is 0.8 A,current through capacitor is 0.4 A & current through resistor is 0.3A.what is the current delivered by ac source?
29. A bullet with a mass of 6.00g is fired through a 1.25kg block of wood on a frictionless surface. The initial speed of the bullet is 896m/s, and the speed of the bullet after it exits the block is 435m/s. At what speed does the block move after the bullet passes through it?
30. what is the expression for change in potential energy and the change in potential?
31. could you please explain the working of a led?
32. Why a rectangular glass slab doesn’t disperse light into seven colors?
33. Two concentric coils have radius 4m and 5m. The smaller coil carries a current of 10A in the clockwise direction. What should be the magnitude and direction of current in the other so that the net magnetic induction at the common center is zero?
34. whether the force of gravity decrease or increase going down belowthe earth surface?effect of height on gravity ?
35. Can we determine the gravitational mass of a body inside an artificial satellite?
36. In a circuit L,C & R are connected in parallel . At any instant current through inductor is 0.8 A,current through capacitor is 0.4 A & current through resistor is 0.3A.what is the current delivered by ac source?

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