11th CLASS GUESS PAPER 2022
PHYSICS
CHAPTER NO. 1 MEASUREMENTS.
SHORT QUESTIONS.
- Define precision and accuracy.
- Give that V= (5.2 + o.a) volt. Find its percentage uncertainty.
- Constant G in the formula F = Gm M /r2
- What is the physical significance of the dimension of physical quantity?
- Write the dimensions of viscosity and angular velocity.
- Show that the expression Vf = Vi + at is dimensionality correct.
- Show that the equation E= mc2 is dimensionally correct.
LONG QUESTIONS.
- Show that the famous “Einstein Equation E = mc2 is dimensionally constant calculate equivalence energy of one kilogram.
- Derive a relation for a time period of a simple pendulum using dimension analysis. The various possible factors on which time period “T” may depend are.
Acceleration due to gravity.
CHAPTER NO. 2 VECTOR AND EQUILIBRIUM.
SHORT QUESTIONS.
- Define Null Vector and component of a vector.
- Find unit vector in the direction of the vector A = 12
- Explain the Cartesian coordinate system.
- If two perpendicular vectors have the same magnitude. Find the angle between their sum and difference?
- Write down the steps for the addition of vectors by the rectangular component method.
- Can the magnitude of a vector ever be zero? Explain.
- Show that : i.j = j.k = k.i = 0
- Give two factors on which turning effect depends.
LONG QUESTIONS.
- Explain cross product or vector of two vector state right-hand rule and give at least four characteristic.
- A load of 10 N is suspended from a clothes line this distorts the line so that it makes an angle of 15o with the horizontal at each end. Find the tension in the clothesline.
CHAPTER NO. 3 MOTION AND FORCE.
SHORT QUESTIONS.
- Define momentum and given its unit.
- What is impulse? Show that impulse and momentum have same unit.
- Define isolated system with an example?
- A bullet is fired from a rifle. Derive the relation for velocity of rifle.
- What is ballistic fight? Explain.
- What is trajectory? Explain briefly.
The horizontal range of projectile is four times of its maximum height. What is angle of projection?
LONG QUESTIONS.
- What is projectile? Derive expressions for the i) Maximum height ii) Horizontal range.
- Numerical No. 3.11
CHAPTER NO. 4 WORK AND ENERGY.
SHORT QUESTIONS.
- Write two difference between conservative and non –conservative force.
- Name the four non-conservative forces.
- An object has one joule of potential energy. Explain what does it mean?
- Convert 1.4 kW into joule/sec.
- What is Salter’s Duck? Explain it.
- What is solar constant and what is its value?
LONG QUESTIONS.
- Explain work done by a variable force.
- Numerical No. 4.7
- Numerical No. 4.4
- Prove that the work done is independent of the path followed in Gravitational field.
CHAPTER NO. 5 CIRCULAR MOTION.
SHORT QUESTIONS.
- Define angular frequency. Give its formula and unit.
- Define positive and negative angular acceleration. Give examples for each.
- Difference between Angular acceleration and centripetal acceleration.
- Banked tracks are need for turns on highway. Why?
- What is difference between inertia and moment of inertia?
- Define angular momentum and give its dimensions.
LONG QUESTIONS.
- Numerical No. 5.10
- What are geostationary Satellites? Derive the relation/expression for radius of geostationary orbit.
CHAPTER NO. 6 FLUID DYNAMICS.
SHORT QUESTIONS.
- How a dynamic lift is produced in an aero plane?
- Two row boats moving parallel in the same direction are pulled towards each other. Explain.
- Derive venture relation.
- Difference between laminar flow and turbulent flow.
LONG QUESTIONS.
- Prove that the product of cross sectional of the pipe and the .Fluid speed at any point along the pipe is a constant.
- Numerical No. 6.5
- Numerical No. 6.7
- Numerical No. 6.9
CHAPTER NO. 7 OSCILLATIONS.
SHORT QUESTIONS.
- If the mass of a spring-mass vibrating system is increased by four times. What is the effect on its frequency?
- What should be the natural period of simple pendulum whose length is 90 cm?
- What happens to the period of a simple pendulum if its length is doubled?
- State the total energy of the vibrating mass and spring is constant.
- Define simple harmonic oscillator and driven harmonic oscillator?
LONG QUESTIONS.
- Define simple harmonic motion. Discuss that energy remains conserved during simple harmonic motion.
- Numerical No. 7.4
- Prove that total energy of a mass-spring system remains constant.
- Sodium light is incident normally on a grating having 3000 lines per centimeter. What is the highest order of the spectrum obtained with this grating?
CHAPTER NO. 8 WAVES
SHORT QUESTIONS.
- Taking an example of periodic wave, Prove that v = f
- What happened when a jet plans like a Concorde files faster than speed of sound?
- On what factors does the fundamental frequency in a stretched string depends?
- Define electromagnetic waves. Give example.
- What is the difference between open and closed organ pipe?
LONG QUESTIONS.
- Describe the transverse stationary waves in a stretched string. Show that the frequencies of stretched string are quantized.
- Show that frequencies of stationary waves in a stretched string are quantized.
- An organ pipe has a length of 50 cm. find the frequency of its fundamental note when it is.
- Open at both ends b) close at both ends.
- Example No. 8.4
CHAPTER NO. 9 PHYSICAL OPTICS
SHORT QUESTIONS.
- What is meant by wave front? Give its types.
- State Huygen’s principle.
- If wavelength of light 600 mm illuminates two slits 0.5 mm apart. The distance between the slits and screen is 200 cm. Calculate its fringe spacing.
- What is the difference between interference and diffraction of light waves?
LONG QUESTIONS.
- What is Michelson’s interference? Explain its construction and working.
- Numerical No. 9.4
CHAPTER NO. 10 OPTICAL INSTRUMENTS.
SHORT QUESTIONS.
- What is optical resolution and resolving power?
- A magnifying glass gives a five times enlarged image at a distance of 25 cm from the lens. Find, by ray diagram, the focal length of the lens.
- How the resolving power of compound microscope by can increased?
- Define the critical angle.
- A person buys a cheap microscope for the use of students the image has coloured edges. Why is this so? Explain briefly.
LONG QUESTIONS.
- Numerical No. 10.8
- What is astronomical telescope? Using ray diagram calculate magnifying of astronomical telescope?
- What is spectrometer? Discuss its different parts write its uses.
- Numerical No. 10.9
CHAPTER NO. 11 HEAT AND THERMODYNAMICS
SHORT QUESTIONS.
- Why is the average velocity of the molecules in a gas zero, but the average of the square of the velocities is not zero?
- Define the term internal energy.
- Define Charles’s law how it derived from kinetic theory of gases.
- Is it possible to convert internal energy into mechanical energy? Explain with an example.
- Give an example of a natural process that involves an increase in entropy.
LONG QUESTIONS.
- Numerical No. 11.8
- What is petrol engine? Describe its working by elaboration its four strokes and what is main difference between petrol engine and diesel engine.
- 336 J of energy is required to melt 1 g of ice at 0 oC. What is the change in entropy of 30 g of water at 0 oC as it is changed to ice at 0 oC by a refrigerator?
- Define and explain entropy with example. Does entropy decreases for reversible reaction? Why absolute cannot determine?
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