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Units and Measurements

NCERT Solutions for class XI Physics Units and Measurements from NCERT solution text book prescribes for class 11 Physics.The chapter covered “To call a dimensional quantity 'large' or 'small' is meaningless without specifying a standard for comparison”. In view of this, reframe the following statements wherever necessary: A new unit of length is chosen such that the speed of light in vacuum is unity. What is the distance between the Sun and the Earth in terms of the new unit if light takes 8 min and 20 s to cover this distance?

Motion in A Straight Line

NCERT Solutions for class XI Physics Motion in A Straight Line from NCERT solution text book prescribes for class 11 Physics.The chapter covered The position-time (x-t) graphs for two children A and B returning from their school O to their homes P and Q respectively are shown in Fig. 3.19. Choose the correct entries in the brackets below;

Motion in A Plane

NCERT Solutions for class XI Physics Motion in A Plane from NCERT solution text book prescribes for class 11 Physics.The chapter covered State, for each of the following physical quantities, if it is a scalar or a vector: volume, mass, speed, acceleration, density, number of moles, velocity, angular frequency, displacement, angular velocity.

Law of Motion

NCERT Solutions for class XI Physics Law of Motion Part-1 from NCERT solution text book prescribes for class 11 Physics.The chapter covered A pebble of mass 0.05 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the pebble, at the highest point where it is momentarily at rest. Do your answers change if the pebble was thrown at an angle of 45° with the horizontal direction? Ignore air resistance.

Work Energy and Power

NCERT Solutions for class XI Physics Work Energy and Power from NCERT solution text book prescribes for class 11 Physics.The chapter covered The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative: Work done by a man in lifting a bucket out of a well by means of a rope tied to the bucket.

System of Particles and Rotational Motion

NCERT Solutions for class XI Physics System of Particles and Rotational Motion Part-1 from NCERT solution text book prescribes for class 11 Physics.The chapter covered Give the location of the centre of mass of a (i) sphere, (ii) cylinder, (iii) ring, and (iv) cube, each of uniform mass density. Does the centre of mass of a body necessarily lie inside the body? Show that the area of the triangle contained between the vectors a and b is one-half of the magnitude of a x b.

Gravitation

NCERT Solutions for class XI Physics Gravitation from NCERT solution text book prescribes for class 11 Physics.The chapter covered You can shield a charge from electrical forces by putting it inside a hollow conductor. Can you shield a body from the gravitational influence of nearby matter by putting it inside a hollow sphere or by some other means?

Mechanicals Properties of Solids

NCERT Solutions for class XI Physics Mechanicals Properties of Solids from NCERT solution text book prescribes for class 11 Physics.The chapter covered Figure 9.11 shows the stress- strain curve for a given material. What are (a) Young's modulus and (b) approximate yield strength for this material? Read the following two statements below carefully and state, with reasons, if it is true or false.

Mechanicals Properties of Fluids

NCERT Solutions for class XI Physics Mechanicals Properties of Fluids from NCERT solution text book prescribes for class 11 Physics.The chapter covered Atmospheric pressure at a height of about 6 km decreases to nearly half of its value at the sea level, though the height of the atmosphere is more than 100 km Hydrostatic pressure is a scalar quantity even though pressure is force divided by area.

Thermal Properties of Matter

NCERT Solutions for class XI Physics Thermal Properties of Matter from NCERT solution text book prescribes for class 11 Physics.The chapter covered The triple points of Neon and Carbon dioxide are 24.57 K and 216.55 K respectively. Express these temperatures on the Celsius and Fahrenheit scales. The triple-point of water is a standard fixed point in modern thermometry. Why? What is wrong in taking the melting point of ice and the boiling point of water as standard fixed points (as was originally done in the Celsius scale)?

Thermodynamics

NCERT Solutions for class XI Physics Thermodynamics from NCERT solution text book prescribes for class 11 Physics.The chapter covered The climate of a harbour town is more temperate than that of a town in a desert at the same latitude. Air pressure in a car tyre increases during driving. The coolant in a chemical or a nuclear plant (i.e., the liquid used to prevent the different parts of a plant from getting too hot) should have high specific heat.

Kinetic Theory

NCERT Solutions for class XI Physics Kinetic Theory from NCERT solution text book prescribes for class 11 Physics.The chapter covered Molar volume is the volume occupied by 1 mol of any (ideal) gas at standard temperature and pressure (STP: 1 atmospheric pressure, 0 °C). Show that the measured volume at STP is 22.4 litres.

Oscilations

NCERT Solutions for class XI Physics Oscilations from NCERT solution text book prescribes for class 11 Physics.The chapter covered Which of the following examples represent (nearly) simple harmonic motion and which represent periodic but not simple harmonic motion? motion of a ball bearing inside a smooth curved bowl, when released from a point slightly above the lower most point.

Waves

NCERT Solutions for class XI Physics Waves from NCERT solution text book prescribes for class 11 Physics.The chapter covered A string of mass 2.50 kg is under a tension of 200 N. The length of the stretched string is 20.0 m. If the transverse jerk is struck at one end of the string, how long does the disturbance take to reach the other end?



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