# Important 2 marks Question Physics Class 11th

The Central Board of Secondary Education is known for its well-structured question paper and comprehensive syllabus. The CBSE is one of the most preferred educational board in the country. CBSE Class 11 exam is one of the important exams in a student’s academic career because the concepts of 11th standard are included in class 12 board examination.

The 11th standard Physics is considered as one of the toughest subjects in class 11 science stream. But with practice and hard work the subject can be very interesting. Students are advised to learn the concepts of Physics properly in order to excel in their examination. One of the best ways to understand the physics concepts and prepare for the board exam is by practicing question papers. The important questions for class 11th Physics are given here to help students prepare for their exam in a better way.

The important 2 marks question for physics class 11th is given here. The 2 marks questions in CBSE question paper for class 11 physics is one of the most scoring section. The questions provided here are prepared by mentors according to the latest syllabus of CBSE class 11 physics. Students can practice the below-given question and prepare for their exam more effectively.

The important 2 marks question for Physics Class 11th is given below.

Question 1-A ball is dropped vertically from rest at a height of 12m. After striking the ground, it bounces to a height of 9m. What fraction of kinetic energy does it loose on striking the ground?

Question 2-Assuming that the Earth’s orbit is a circle of radius $$1.5 \times 10^{8}$$ km. Calculate the mass of the sun.

Question 3-The acceleration time-graph of a body is shown in the given figure. Plot the corresponding velocity-time graph.

Question 4-(i) Distinguish between an isothermal and an adiabatic process.

(ii) Distinguish between an isochoric and isobaric processes.

Question 5-A waterfall is 100 m high. How much warmer will the water be after the fall? Assume that all the work gets converted into the heat energy. Tak the average value of g to be $$980 \;cm/s^{2}$$.

Question 6-A narrow sound pulse is sent across a medium.

(i) Does the pulse have a definite (a) Wavelength (b) Frequency (c) Speed of propagation

(ii) If the pulse rate is 1 after every 20 sec, is the frequency of the note produced 0.05 Hz?

Question 7-During an experiment, an ideal gas is found to obey an additional law $$VP^{2}=$$ constant. The gas is initially at a temperature T and volume V. When it expands to a volume 2V, what does new temperature become.

Question 8-A person is measuring the velocity of sound in an experiment. He found that velocity of sound to be $$61 cm/s$$ for every single $$1^{\circ}C$$. Show this mathematically.

Question 9-The change in the value of g at a height h above the Earth is same as at a deep d below it. If h and d are compared to the radius of the earth, what is the ratio $$\left ( h/d \right )?$$

Question 10-If the angular momentum is conserved in a system whose moment of inertia is decreased, will its rotational kinetic energy be also conserved.

Question 11-A body of mass 5 kg is acted upon by two perpendicular forces of magnitude 8N and 6N. Find the magnitude and direction of the acceleration.

Question 12-Consider the wave equation, y(x,t) = $$y(x,t) = A \sin (\omega t – kx )$$.

(i) Obtain expression for particular.

(ii) Establish a relation between particle and wave velocity.

Question 13-If an observer starts observing a SHM from the instant particle executing SHM passes through its mean position. Write the displacement equation of motion and plot displacement-time graph.

Question 14-The length, breadth and thickness of a rectangular sheet of metal are 4.234m, 1.005m and 2.01cm respectively. Give the area and volume of the sheet to correct significant figures.

Question 15-Use the first law of thermodynamics, determine an adiabatic relation between pressure and volume.

Question 16-Explain why do the temperature less than absolute zero (0 K) is not possible.

Question 17-Show that the net work done during a cyclic process is numerically equal to the area of loop representing the cycle.

Question 18-Determine the waveform if a harmonically moving transverse wave on a string has a maximum particle velocity and acceleration of 3 $$m/s^{2}$$ and 90 $$m/s^{2}$$, respectively. Velocity of the wave is 20 $$m/s$$.

Question 19-A man runs across the rooftop of a tall building and jumps horizontally with the hope of landing on the roof of the next building which is at a lower height than the first. If his speed is 9 m/s, the horizontal distance between the two building is 10 m andthe height difference is 9 m, will he be able to land on the next building?

Question 20-Briefly explain on the basis of kinetic theory, why do the pressure of a gas is increased when the gas is heated?

Question 21- The vertical motion of a big piston in a machine is approximately simple harmonic with a frequency of $$0.50 s^{-1}$$. A block of 10 kg is placed on the piston. Find the maximum amplitude of the piston’s SHM for the block and the piston to remain together.

Question 22-What do you meant by the efficiency of a heat engine? Briefly explain.

#### Practise This Question

BaSO4 and carbon on heating reacts to produce