xii physics practise paper 2

xii physics practise paper

Xii physics sample paper

xi physics holiday home work

Dear students as i informed you about holiday homework follow the following instructions

1. Submit holiday homework in a register.

2. Same register you can use it for revision

3.this consists of total 30 numericals.

3. Before solving the H.W go through all the chapters and learn the formulae

4. H.W emphasis you more on numericals which is more important in physics.

5. Before solving H.W write chaterwise all the formulae in you register this compulsory.

6.solve the following numericals chapterwise.

Xii physics holiday homework

Dear students as i informed you about holiday homework follow the following instructions

1. Submit holiday homework in a register.
2. Same register you can use it for revision during intensive classes.
3. Before solving the H.W go through all the chapters and learn the formulae
4. H.W emphasis you more on numericals which is more important in physics.
5. Before solving H.W write chaterwise all the formulae in you register this compulsory.
6.solve the following numericals chapterwise.

class x holiday home work(PHYSICS)

dear students,

Follow the given instructions:

 

• submit the holiday home work in A4 size papers
• this home work consists of diagrams and tables.
• for all the diagrams and tables I mentioned page numbers.
• draw all the diagrams with pencil only.
• draw a neat labeled diagrams.
• submission in on 17th Oct.
• note: these diagrams carry about 10marks in the board exams.

 

 

 

Figure 10.2                             Pg No.     162

(a) Concave mirror

(b) Convex mirror

 

Figure 10.3                             Pg No.     164

Figure 10.4                             Pg No.     165

Figure 10.5                             Pg No.     165

Figure 10.6                             Pg No.     165

 

Figure 10.7 Ray diagrams for the image formation by a concave mirror             Pg No.     166

 

Figure 10.8 Formation of image by a convex mirror                                             Pg No.     167

Figure 10.10

Refraction of light through a rectangular glass slab                                              Pg No.     173

 

Table 10.2 Nature, position and relative size of the image formed by a convex mirror                       Pg No.167

Table 10.1 Image formation by a concave mirror for different positions of the object                       Pg No.164

 

 

class xi physics pratcise questions

ARMY PUBLIC SCHOOL GOLCONDA

PRACTISE QUESTIONS

1.      Find the dimensional formula of the following constants in each formula

a = At+Bt²+C    F= bt+ct²                    V= at³ + bt + c P= ½ At² + Bt/2

2.      Suppose that two objects attract each other with a gravitational force of 16 units. If the distance between the two objects is doubled, what is the new force of attraction between the two objects?

3.      Find the net gravitational force on an object is placed at the centre of the square due to four identical masses of each 1 kg are placed at four vertices of square whose side is 1m in length.

4.      A calorie is a unit of heat or energy and it equals about 4.2 J where 1J = 1 kg m2 s –2 . Suppose we employ a system of units in which the unit of mass equals α kg, the unit of length equals β m, the unit of time is γ s. Show that a calorie has a magnitude 4.2 α–1 β –2 γ 2 in terms of the new units.

5.      The length, breadth and thickness of a rectangular sheet of metal are 4.234 m, 1.005 m, and 2.01 cm respectively. Give the area and volume of the sheet to correct significant figures.

6.      When two masses of 10 kg and 15 kg are separated by a distance of 10 m find out a point between them where net G.F become zero.

7.      Define the kepler laws of motion.

8.      Define static and kinetic frictional forces and write the expressions for them.

9.      Which is easier push or pull explain

10.  Calculate the engine power that is required to lift wight of 100*10³ kg of coal per hour from a mine which is 360 m deep . Take g = 10  ms-²

11.  A boy having a mass of 40 kg runs up a flight of 50 steps , each step is 10 cm high and the boy crosses each step in 5 seconds .Calculate (a) Work done  (b) Power developed .Given g = 9.8 ms-² .

12.  A ball is dropped from a height of 10 m. What is its velocity when it hits the ground?

13.  A bullet of mass 15 g has a speed of 400 m/s. What is its kinetic energy ? The bullet strikes a thick target and is brought to rest in 2 cm, calculate the average net force acting on the bullet. What happens to kinetic energy originally in the bullet?

14.  Whenn loading a truck, a man lifts boxes of 100 N each through a height of 1.5 m.

(a) How much work does he do in lifting one box ?

(b) How much energy is transferred when one box is lifted ?

(c) If the man lifts 4 boxes per minute, at what power is he working ? (g = 10 m s−2)

15.  A 1 kg block collides with a horizontal light spring of force constant 2 N/m. The block compresses the spring m from rest position. Assuming that the coefficient of kinetic friction between the block and the horizontal surface is 0.25. What was the speed of the block at the instant of collision.

16.  A train travels at 60 m/s to the east with respect to the ground. A businessman on the train runs at 5 m/s to the west with respect to the train. Find the velocity of the man with respect to the ground.

17.  A train is moving in the west direction with a velocity 15m/s.A monkey runs on the roof of the train against its motion with a velocity 5m/s with respect to train .Take the motion along west as positive
5.Velocity of train relative to its driver

18.  At what distance apart would two equal masses of 150 kg need to be placed for the force           between them to be 2.0  10–5 N?

19.  Calculate the size of the gravitational pull of a sphere of mass 10 kg on a mass 2.0 kg      when their centres are 200 mm apart.What is the force of the 2.0 kg mass on the 10 kg mass?

20.  Find the resultanat force  and direction when two forces of 5N and 10N are acting on a same object at angle of 45⁰.

21.  Draw velocity - time graph for motion with 

·         Negative constant acceleration

·                     Positive constant acceleration

·                     uniform acceleration

22.  Draw position - time graph for motion with             

                                I.            Positive velocity          ii.         Negative velocity        iii.        Zero velocity

                              II.            Positive acceleration              iv.        Zero acceleration

23.  Draw position - time graphs of two objects moving along a straight line when their relative velocity is (i) zero and (ii) non - zero

24.  Find the resultanat force  and direction when two forces of 4N and 3N are acting on a same object perpendicular to each other.

25.  The ceiling of a long hall is 25 m high. What is the maximum horizontal distance that a ball thrown with a speed of 40 m s–1 can go without hitting the ceiling of the hall?

26.  A cricketer can throw a ball to a maximum horizontal distance of 100 m. How much high above the ground can the cricketer throw the same ball?

27.  A stone tied to the end of a string 80 cm long is whirled in a horizontal circle with a constant speed. If the stone makes 14 revolutions in 25 s, what is the magnitude and direction of acceleration of the stone?

28.  An aircraft executes a horizontal loop of radius 1.00 km with a steady speed of 900 km/h. Compare its centripetal acceleration with the acceleration due to gravity.

29.  A particle starts from the origin at t = 0 s with a velocity of 10 𝑗̂ 𝑚/𝑠 and moves in the x-y plane with a constant acceleration of (8.0𝑖̂+ 2.0𝑗̂) 𝑚𝑠 −2 a) At what time is the x-coordinate of the particle 16 m? What is the y-coordinate of the particle at that time? b) What is the speed of the particle at the time?

30.  The bob of a pendulum is released from a horizontal position. If the length of the pendulum is 1.5 m, what is the speed with which the bob arrives at the lowermost point, given that it dissipated 5% of its initial energy against air resistance?

31.  Two billiard balls each of mass 0.05 kg moving in opposite directions with speed 6 ms –1 collide and rebound with the same speed. What is the impulse imparted to each ball due to the other?

32.  A person trying to lose weight (dieter) lifts a 10 kg mass, one thousand times, to a height of 0.5 m each time. Assume that the potential energy lost each time she lowers the mass is dissipated. (a) How much work does she do against the gravitational force? (b) Fat supplies 3.8 × 107 J of energy per kilogram which is converted to mechanical energy with a 20% efficiency rate. How much fat will the dieter use up?

33.  A body of mass 2 kg initially at rest moves under the action of an applied horizontal force of 7 N on a table with coefficient of kinetic friction = 0.1. Compute the work done by the applied force in 10 s, work done by friction in 10 s, work done by the net force on the body in 10 s, change in kinetic energy of the body in 10 s, and interpret your results

34.  A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15 ms–1 . How long does the body take to stop?

35.  A constant force acting on a body of mass 3.0 kg changes its speed from 2.0 m s–1 to 3.5 m s–1 in 25 s. The direction of the motion of the body remains unchanged. What is the magnitude and direction of the force?

36.  A man of mass 70 kg stands on a weighing scale in a lift which is moving a) upwards with a uniform speed of 10 m s–1 , b) downwards with a uniform acceleration of 5 m s–2 , c) upwards with a uniform acceleration of 5 m s–2 . What would be the readings on the scale in each case? d) What would be the reading if the lift mechanism failed and it hurtled down freely under gravity?

37.  A body of mass 10kg is acted upon by two perpendicular forces of magnitude 10N and 5N. Find the magnitude and direction of the acceleration.

38.  Write the expressions for the following

a)      Maximum height              b) range          c) time of flight           d) kepler third law

e)   escape velocity           f) orbital velocity        g) work done by variable force

h) impulse i) K.E in terms of momentum

39.  Find the percentage errors in the following

a)      S= 10± 0.1 m         t= 1 ± 0.1 s                  in velocity

b)      M= 25± 1 kg          F= 20± 1 N       in acceleration

c)      E= 100± 2 J            M= 2 ± 0.1 kg h= 20 ± 1 m     in acceleration           

d)      a = 10 ± 0.1 m/s²               t= 10 ± 0.1 s                in velocity

40.  derive the following expressions

·         equations of motion by calculus method

·         projectile motion A) max height b) Time of flight  c) range

·         potential energy stored in spring

·         final velocities in 1D elastic collision

·         banking of roads

·         mechanical energy is conserved in free fall object

·         conservation of momentum

·         variation in g due to altitude and depth

·         escape velocity

·         orbital velocity

·         work energy theorem by constant force and variable force

class x sa-1 sample papers

Dear students, as u know we have very less time for the preparation of preboard exams and u need lot of practice to score good marks in pre board.the secrete of success to score good marks in science is to practice and solve many papers as many as possible.here are two sample papers solve it in your note book submit.