Class 11 Physics Solutions

• Our comprehensive class 11 physics question answer will ensure you're fully prepared for your exams.
• Define physics and give the names of its two main branches.
• Define solid state physics and nuclear physics.
• What are the main frontiers of fundamental science?
• Briefly describe principle of superposition.
• What are stationary waves and how are they produced?
• Which is richer in harmonics, an open organ pipe or a closed organ pipe?
• Define X-ray diffraction? Also write its two uses.
• What is the meaning of fringe spacing and on which factors it depends upon?
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• Differentiate between base unit and derived units.
• What do you mean by scientific notation? Give an example. 
• Define radian and steradian
• Define Doppler’s shift. Also write its formula.
• What is velocity of sound in air, if temperature of air is 200C?
• What is apparent change in frequency when observer is moving towards stationary source?
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• Define random error and systematic error.
• Explain how can we remove the effect of systematic error and random error?
• Briefly explain the multiplication of a vector by a scalar.
• Define second law of thermodynamics in terms of Entropy.
• Define Diesel engine how works.
• Define petrol engine and its working? 
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• Define Null vector and equal vectors.
• What is negative vector? How B is subtracted from A? 
• Why do you keep your legs far apart when you have to stand in the aisle of a bumpy riding bus? 
• Differentiate isothermal and adiabatic processes with graphs.
• Define molar specific heat. What is the difference in molar specific heat at constant volume and constant pressure?
• What is Carnot theorem and how Carnot engine works on the theorem?
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• You are falling off the edge. What should you do to avoid the fall? 
• Define torque and moment arm. Also give physical significance of torque.
• What do you understand by positive and negative torque?
• Write down the formula of time and speed for measuring the speed of light? 
• Explain total internal reflection?
• Differentiate cladding and jacket? 
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• Differentiate between distance and displacement.
  
• Explain what do you mean by the term velocity?
• What is meant by instantaneous acceleration? Write its formula.
• What are the meaning of eye piece and objective lenses?
• How can we measure the magnification of an astronomical telescope?
• Define spectrometer and write down its essential parts?
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• Why the first law of motion is also called the law of inertia.
• Show that the rate of change in momentum for an object is equal to the applied force. 
• How would you find the momentum of an explosive force? Explain with one example.
• Define refractive index?
• Define Thermodynamics and describe the kinetic theory of gases?
• Describe the relation of temperature and kinetic energy? 
• Differentiate work and energy, derive formula for work done ?
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• Write down two characteristics of ballistic missile.
• What do you understand by work and energy? Give their units.
• What do you mean by variable force? Give its two examples.
• Define wave front also differentiate spherical and plane wave front? 
• State Huygen’s principle and its two steps.
• Define interference of light and its conditions.
• Define Light and Physical Optics.
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• Define conservation field. Give its two examples.
• Define work energy principle. Also write down its equations.
• What is escape velocity of an object? Write its mathematical expression.
• Define least distance of vision and what is the minimum value of human distance of vision?
• Define magnification and resolving power?
• How can we measure the magnification of simple microscope?
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• Write down two sources of energy which are renewable.
• How electrical energy be obtained by sunlight by indirect conversion method?
• How energy is obtained from direct combustion and fermentation?
• What are the conditions for dark and bright fringes in Young double slit experiment of interference? 
• Explain thin films and also explain the darkness of central fringe of Newton ring.
• What is diffraction grating? 
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• Differentiate between degree and radian?
• Can a body move along a circle without centripetal force? 
• An object revolving around the earth is said to be a freely falling body. Why?
• Define Beats. Write its two uses.
• Define interference of waves. Write the conditions for interference.
• Write down effects of variation of pressure and density on the speed of sound.
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• State right hand rule to find the direction of angular displacement?
• Describe what should be the minimum velocity for a satellite to orbit close to the Earth around it.
• Write down applications of communication satellite.
• Define mechanical and electromagnetic waves. 
• Write any two applications of Doppler’s effect.
• Differentiate between “an open organ pipe” and “a closed organ pipe”.
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• What is meant by centripetal force? How is it converted in terms of angular velocity?
• Why banked tracks are needed for turns?
• Define artificial gravity. Write down expression for its frequency.
• What is the effect of density on speed of sound?
• Why can microwave not detect underwater object?
• Explain the term red shift and blue shift in Doppler’s effect?
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• Define and explain briefly drag force.
• Briefly explain viscous drag and Stoke’s law.
• State the Stoke’s law and write its formula.
• Evaluate the frequency of a simple pendulum whose length is 9.8 m.
• Why sound travel faster in hydrogen than in oxygen?
• Define waves and progressive waves.
• Write characteristic of stationary waves. 
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• Explain the term viscosity? What is its unit?
• What is the Venturi’s effect? Write only its mathematical form.
• Define systolic and diastolic pressure.
• What is second’s pendulum? Find its length and frequency.
• Define damping and resonance?
• If an astronomer wants to study the stars which are million years away, which type of telescope they will use? 
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• Define Hooke’s law. Write it in mathematical form? 
• If a heavy and light masses of same size are set to vibration which of them will stop first? 
• What is difference between displacement and amplitude?
• How resonance is produced in tuning of radio set? 
• Define frequency and time period and relation in them.
• When white light projected through the diffraction grating and produces interference? What colors are between the bands of interference?
• Our comprehensive class 11 physics solved exercise will ensure you're fully prepared for your exams.
• State the total energy of the vibrating mass and spring is constant. Differentiate between free and forced oscillations?
• Write an advantage and a disadvantage of resonance.
• Describe the condition under which a vibrating body resonates with other body.