This is the first sample paper designed on the basis of latest CBSE pattern , by physics classes by nayan jha. student may solve the entire question paper for the practice well before the examination. I also want to inform that such kind of question paper will be provided every week ( on sunday) student can download all question paper and test himself after solving all question papers.
Sample paper -1 .
Sec-A mark-1
Two charges 3×10-5 and 5×104C are placed at a distance 10cm from each other. Find the value of electrostatic force acting between them. (a)5×1011N(b)40×1011N(c)180×109N(d)5×1010N
When charge is supplied to a conductor, its potential depends upon (a)The amount of charge (b)Geometry and size of conductor (c)Both (a) & (b) (d)Only on (a)
Kirchhoff’s II law for the electric network is based on: (a)Law of conversation of charge (b)Low of conversation of energy (c)Low of conversation of angular momentum (d)Low of conversation of mass
In a whetstone’s bridge, all the four arms have equal resistance R. if resistance of the galvanometer arm is also R, then equivalent resistance of combination is (a)R(b)2R(c)R/2(d)R/4
In a certain reason of space, electric filled E vector and magnetic filled b vector are perpendicular to each other. An electron inters perpendicularly to both the fields and move undeflected. The velocity of electron is (a)E/B (b)B/E (c)E vector x B vector (d)E vector. B vector
How does the focal length of a convex lens changes if mono chromatic red light is used instead of violet light? (a)Focal length is increased when red light is used (b)Focal length is decreases when red light is used (c)Focal length is remain same when red light is used (d)Not depends on colour of light.
the phenomenon of polarization is exhibited by (a)longitudinal wave(b)matter wave(c)transverse wave(d)mechanical wave
which of the following is correct for” Malus Law” (a)I=I2v cos2 θ(b)I=Iv cos2 θ(c)I=I2v sin2 (d)I=Iv tan-1 θ
the theory on the basis of photoelectric effect can be explained: (a)Corpuscular theory(b)Wave theory(c)Electromagnetic theory(d)Quantum theory
10.When alpha particle are sent through a thin gold foil, most f beam go straight through the foil because (a)Alpha particles are positively charged(b)Alpha particles are is more than mass of electron(c)Most of the part of an atom is empty space(d)Alpha particles moves with high velocity
this test paper specially design for the students of class 11th( physics) . this question paper covers questions from chapter 1st to chapter 6th . student can check there preparation using this test paper . this question paper also contain very important questions , so students must try to solve these question test paper for class 11th.
projectile
Test -11th
M.M.-30 TIME-1:00
All questions are compulsory , section- A contains 5 questions each carry 1 mark, section- B contains 7 questions each carry 2 marks ,section- C contains 12 questions each carry 3 marks , section-D contains 3 questions each carry 5 marks.
SECTION (A )
The volume of an object as a function of time is calculated by where t is time in seconds and v is in cubic meter. Determine the dimensions of constants A and B.
A stone is thrown such that its horizontal range is 4 times the maximum height. Find the angle of projection.
A cricket ball of mass 150 g has an initial velocity m/s and final velocity m/s after being hit. Calculate the change in momentum.
What happens to coefficient of friction when the weight of a body is doubled ?
If a man in an elevator drops his briefcase but it does not fall to the floor, what can you conclude about the elevator’s motion?
SECTION-B
When a particle rotates in a circle, a central force acts on it directed towards the center of rotation. Why does this force does no work on the particle?
A cubical block rests on a plane of coefficient of friction √3. The angle through which the plane be inclined to the horizontal so that the block just slides down will be what? Also define angle of repose.
Show that the path followed by the particle given angular projection is parabolic.
If a projectile is projected with same initial velocity at two different angles α and β with the horizontal , if horizontal distance covered in both the cases are same thin find the ratio of there maximum height attained in both cases.
The block of mass M moving on the frictionless horizontal surface collides with the spring of spring constant k and compress it by length L. Calculate the maximum momentum of the block after collision.
Explain impulse-momentum theorem. Give some practical applications of impulse.
State and explain work energy principle using calculus method.
SECTION-C
The displacement of a body is proportional to t3, where t is time elapsed , then what will be the nature of velocity-time and acceleration – time graph. Also plot the position time graph for the uniform motion of an object along a straight line , if (i) x0=positive , v=negative and magnitude of velocity is constant (ii) both x0 and v are negative and magnitude of velocity is constant.
Explain Parallax method, how it is used to find the radius of the planet ?
The escape velocity v of a body depends on the (i) acceleration due to gravity,(ii)the radius R of the planet. Establish dimensionally the relation for the escape velocity. Also write the dimension of gravitational constant G.
Define acceleration due to gravity. Obtain relations to show how the value of ’g’ changes with (i) altitude , (ii) depth .
15. state and derive Kepler’s laws of area and periods for circular orbits.
A man can jump 1.5 m on earth . calculate the height he may be abled to jump on a planet whose density is one quarter that of earth and whose radius is one third that of earth.
19.A uniform circular disc of radius R is rolling on a horizontal surface . Determine the tangential velocity (i) at the upper most point ,(ii)at the center of mass and (iii) at the point of contact.
A body is moving with uniform acceleration , its velocity after 5 sec is 25m/s and after 8 sec is 34m/s. calculate distance it cover in 15th sec .
A pump on the ground floor of a building can pump up water to fill a tank of volume 30 m3 in 15 min. If the tank is 40 m above the ground , how much electric power is consumed by the pump , the efficiency of the pump is 30%.
22.Define spring constant , write the characteristics of the force during the elongation of the spring . Derive the relation for the potential energy stored when it is elongated by the distance X .
(i) A light and heavy body have same kinetic energy , which of the two have more momentum and why? (ii) If kinetic energy of a body is increased by 300% , find the % increase in its momentum.
Two blocks of mass 2kg and 5kg are connected by a light and inextensible string passing over a frictionless pulley . the block of mass 2 kg is free to slide on a surface inclined at an angle of 300 with the horizontal whereas 5 kg block hangs freely . find the acceleration and tension in the string.
SECTION-D
What do you mean by Banking of roads. What is the need of banking a circular road. Discuss the motion of car on banked circular road(with friction).
A vehicle running with speed 72 km/hr applies brakes producing a retardation of 3 m/s2 while taking a turn of radius 100 m. Find the acceleration.
State and prove the theorem of (i) parallel axis and , (ii) perpendicular axis . Also find the moment of inertia of a circular disc about the axis perpendicular to the plane and passing through the center .
How does a perfectly elastic collision is different from perfectly inelastic collision ? Two particles of mass m and M having velocities u1 and u2 respectively make an head on collision .Derive the relation for their final velocities . discuss the following special cases (i)m=M (ii) m>M and u2=0
THIS QUESTION PAPER CONTAINS THE IMPORTANT QUESTIONS OF ELECTROSTATIC POTENTIAL AND CAPACITANCE IT IS IMPORTANT FOR THE BOARD EXAMINATION FOR CLASS 12TH
What do you mean by the term equipotential surface ? Draw the equipotential surface for (i) a point charge, (ii) an electric dipole , (iii) two positive charges of equal magnitude separated by some distance (iv) two uniformly large parallel thin plates having charge density +σ and -σ separated d distance apart. Can two equipotential surface intersect each other ? give reason. Why there is no work done in moving a charge fro one point to other on an equipotential surface? TO DOWNLOAD COMPLETE QUESTIONS PAPER CLICK HERE –ELECTROSTATIC POTENTIAL AND CAPACITANCE
This assignment contains very important questions of ELECTRIC CHARGES AND FIELDS
Explain the following terms –(a) Quantisation of charge . (b) Additivity of charge and (c) conservation of charge.
What is electric field lines ? Draw the field lines for (a) A positive charge (b) A negative charge (c) An electric dipole (d) Two positive charge having equal magnitude separated by some distance, (e) ) Two positive charge having different magnitude separated by some distance, and (f) A plane positively charged sheet (g) A positive point charge (+q) is kept in the vicinity of an uncharged conduction plate. Sketch the electric field lines originated from the point on to the surface of the plate. Also explain why ( I ) Field lines never intersect each other? (ii) Why field lines always comes out normally to the surface ?
What do you mean by the term electric dipole and dipole moment? Is it scaler or vector quantity? Find the electric at a point the (i) axial and (ii) equatorial point , also find the relation between them . Also deduce an expression for the torque acting on a dipole and energy stored in the dipole when it is placed in the uniform electric field E .What will happen to the dipole when it is placed in non – uniform electric field?
State and prove Gauss theorem . Using Gauss’s theorem find the magnetic field at a point due to (i) straight charged wire , (ii) plane charged sheet , show that it is independent of distance of the point from the sheet , and (iii) charged spherical shell also plot the graph between electric field and separation of point from the centre of the shell. Using Gauss’s law also derive an expression for the electric field between two uniformly charged parallel sheets of charge density σ and -σ respectively
(i)Define electric flux , write its SI unit . (ii)The electric field components due to a charge inside the cube of side 0.1m are shown below Ex=αx , where α =500N/C-m EY=0,EZ=0Calculate (a) The flux through the cube (b)the charge inside the cube CLICK HERE TO DOWNLOAD-Very important questions for ELECTRIC CHARGES AND FIELD
