H S S PHYSICS MODEL QUESTION PAPERS

Qs no Mark 1 a) State the work-energy theorem. 1 2 Classical dancers bring their hands closer to their body to rotate faster. Name the principle employed by them 1 3 a) State Kepler’s second law of planetary motion. (Law of areas). b) Derive an equation for the orbital velocity of a satellite. c) Escape the velocity of a planet is 20 Km/s. Find the orbital velocity of the smallest possible orbit. 1 2 2 4 A rat and a horse are to be projected from earth into space. State whether the velocity is the same or different in projecting each animal. Justify. 2 5 Explain the term radius of gyration of a body. 2 6 A person drives a car along a circular track on a level ground. a) Derive an expression for the maximum safe speed of the car. b) Why do we give banking to curved roads?          3                    2 7  A coin is rolling on a plane surface. What fraction of its total kinetic energy is rotational?       2 8 a) Calculate the work done in lifting a body of mass 10 kg to a height of 10m above the ground. b) State and prove the law of conservation of energy of a freely falling body. c) Draw the variation of KE and PE with the height of the body 1 2 2 9 When a horse suddenly starts moving, the rider fails backward. a) Name and state the law used to explain the above situation. b) State the law of conservation of linear momentum and prove it on the basis of second law of motion. 1 2 10 Derive the mathematical relation between angular momentum and torque. State the law of conservation of angular momentum. 4 11 When a shot is fired from a gun, the gun is moved in the backward direction. a) State the principle behind it. b) A bullet of mass 100 g is fired from a gun of mass 200 kg with a speed of 50 m/s. calculate the recoil velocity of the gun. 1 2 12 A solid cylinder of mass 20kg rotates about its axis with an angular speed of 100 rad s-1. The radius of the cylinder is 0.25m. What is the magnitude of angular momentum of the cylinder about its axis? 2 13 A thief jumps from the top of a house with a box of weight 25kg.wt. on his head. What will be the weight of the box experienced by the thief during his downward fall? Justify your answer 3 14 Arrive at an expression for the escape speed from the earth. 2
1	Write the expression for the intensity of electric field near to the surface of a charged conductor with uniform charge density σ	1
2	Write the mathematical expression for Coulomb`s law	1
3	Why is it safe to be inside a bus than sheltered under a tree during a lightning	2
4	Two equal and opposite charges +q and -q are separated by a small distance  2a. a. name this arrangement b. define its moment. What is its direction?	1 1
5	An electric dipole is placed in an external electric field. Derive the expression for the potential energy of the dipole.	2
6	a)Write the SI unit of capacitance b)You are given two capacitors having capacitances C1 and C2. Derive the expression   for  parallel and series combinations	1 4
7	The plates of a parallel plate capacitor have an area of 90 cm each and are separated by 2.5 mm .what would be its capacity?	2
8	With the help of a circuit diagram describe the method to find the value of an unknown resistance using meter bridge arrangement	4
9	State Kirchoff's laws for electrical circuits	3
10	Explain the construction and working of a cyclotron with the help of a neat diagram	3
11	A galvanometer is a device which can be used for measuring the value of current or voltage. a) how will you convert a galvanometer to an ammeter. b)a galvanometer with a coil resistance 12 ohm shows full-scale deflection for a current 2.5 mA. How will you convert that in to an ammeter of range 0-7.5 A?	1 2
12	State Ampere circital law. Using Ampere circuital law obtain the expression for the magnetic field related to a solenoid.	4
13	A car covered the first 400m distance with a speed of 8m/s, the next 1200m with a speed of 12m/s and the last 360m with a speed of 12m/s. calculate the average speed of the car.	5
14	Fill in the blanks	6
	1.                  ..........is a solid lubricant
	2.                  A ball rolling on level ground has ............. acceleration
	3.                   2.5 km = ............................m
	4.                   5g =........................kg
	5.                   3hr =.......................second
	6.                  The force used by all living organism to do work is called......................
15	Describe thrust and pressure	2
16	Running through a path of length 250m, Manu reached at the same point after 5 sec. calculate his distance and displacement	2
17	What do you mean by mass of a substance?	1
18	Complete the table	2
	Initial velocity u Final velocity v Change in velocity (v-u) Time is taken for a change in velocity(t) Acceleration a=(v-u)/t 0 5m/s 5m/s 10sec ...................... 14m/s ..................... -8m/s 10sec -0.8m/s2