Class 10 Physics Chapter 1 Question Answer

Important Class 10 Physics Chapter 1 Question Answer written by Mr. Qamar Jamal Suib. These computerized notes are very helpful in the preparation of Simple Harmonic Motion Class 10 for students of the 10th class Physics and these are according to the paper patterns of all Punjab boards.

• Here are the detailed Class 10 Physics Chapter 1 Question Answer to help you prepare for your exams.
• Simple Harmonic Motion and Waves Exercise Multiple Choice Questions ( MCQs ) with correct Answers
• Simple Harmonic Motion and Waves Exercise Short Questions with Answers 
• Simple harmonic motion (SHM) is a to and fro oscillatory motion in which acceleration of the body is directly proportional to the displacement of the body from the mean position and is always directed towards the mean position.
• The motion of a mass attached to a spring, simple pendulum and that of a ball inside a bowl is SHM.
• Time taken by the simple pendulum to complete one cycle is called its time period. It depends upon the length of the pendulum and is independent of the mass and amplitude of the pendulum.
• The number of cycles completed in one second is called frequency of a vibrating body. It is reciprocal of time period.
• The maximum displacement from mean position of a body performing SHM is called amplitude.
• Wave is a phenomenon of transferring energy from one place to another without the transfer of matter.
• Mechanical waves are those waves which require some medium for their propagation.
• Electromagnetic waves do not require any medium for their propagation.
• Transverse waves are the mechanical waves in which particles of the medium vibrate about their mean position perpendicular to the direction of propagation of the waves.
• If you're looking for comprehensive 10th class physics chapter 1 question answer, you've come to the right place.
• Compressional (longitudinal) waves are the mechanical waves in which particles of the medium vibrate about their mean position along the direction of propagation of the waves.
• The speed (v) of a wave is equal to the product of frequency ( f) and wavelength (λ) i.e.,v =f λ .
• Ripple tank is a device used to produce water waves and to demonstrate different properties of water waves like reflection, refraction and diffraction.
• When a wave travelling from one medium falls on the surface of another medium, it may bounce back into the first medium. This phenomenon is called reflection of waves.
• When waves from one medium enter the second medium at some angle their direction of travel may change. This phenomenon is called refraction of waves. The speed and wavelength of wave change in different media but frequency does not change.
• The bending of waves around obstacles or sharp edges is called diffraction of waves.
• BALL AND BOWL SYSTEM: The motion of a ball placed in a bowl is another example of simple harmonic motion. When the ball is at the mean position O, that is, at the centre of the bowl, net force acting on the ball is zero. In this position, weight of the ball acts downward and is equal to the upward normal force of the surface of the bowl. Hence there is no motion. Now if we bring the ball to position A and then release it, the ball will start moving towards the mean position O due to the restoring force caused by its weight. At position O the ball gets maximum speed and due to inertia it moves towards the extreme position B. While going towards the position B, the speed of the ball decreases due to the restoring force which acts towards the mean position. At the position B, the ball stops for a while and then again moves towards the mean position O under the action of the restoring force. This to and fro motion of the ball continues about the mean position O till all its energy is lost due to friction. Thus the to and fro motion of the ball about a mean position placed in a bowl is an example of simple harmonic motion.
• MOTION OF A SIMPLE PENDULUM: A simple pendulum also exhibits SHM. It consists of a small bob of mass ‘m’ suspended from a light string of length ‘l’ fixed at its upper end. In the equilibrium position O, the net force on the bob is zero and the bob is stationary.