{"id":1429,"date":"2020-06-29T16:58:17","date_gmt":"2020-06-29T16:58:17","guid":{"rendered":"https:\/\/murreeroad.org\/physics10\/?p=1429"},"modified":"2020-07-03T13:12:25","modified_gmt":"2020-07-03T13:12:25","slug":"physics-10th-chapter-10-sq-fromboard","status":"publish","type":"post","link":"https:\/\/murreeroad.org\/physics10\/physics-10th-chapter-10-sq-fromboard\/","title":{"rendered":"Physics 10th chapter 10-sq-fromboard"},"content":{"rendered":"\n\n\n
Important Short Questions From Board Papers<\/a><\/strong><\/span><\/td>\n<\/tr>\n<\/thead>\n<\/table>\n

Q.1 What is spring constant? Write its formula.<\/a><\/p>\n

Q.2 Define waves equation and write its formula.<\/a><\/p>\n

Q. 3 What is meant by wavelength?<\/a><\/p>\n

Q.4 What is the function of Ripple Tank?<\/a><\/p>\n

Q. 5 Define refraction of waves.<\/a><\/p>\n

Q. 6 Define Restoring Force.<\/a><\/p>\n

Q.7 Define vibratory motion.<\/a><\/p>\n

Q.8 Define SHM. Also write features of SHM.<\/a><\/p>\n

Q.9 . Define simple pendulum. Write down its time period equation\/formula.<\/a><\/p>\n

Q.10 What is meant by vibration?<\/a><\/p>\n

Q.11 Define damped oscillations. Give its two examples for daily life.<\/a><\/p>\n

Q.12 Define wave motion.<\/a><\/p>\n

Q.13 Define longitudinal waves.<\/a><\/p>\n

Q.14 Define Transverse Waves.<\/a><\/p>\n

Q. 15 Define electromagnetic waves. Also give an example.<\/a><\/p>\n

Q. 16 A ball is dropped from a certain height onto the floor and keeps bouncing. Is the motion of the ball is simple harmonic? Explain.<\/a><\/p>\n

Q.17 Define wave.<\/a><\/p>\n

Q.18 Define Crest and Trough.<\/a><\/p>\n

Q.19 What is meant by compression?<\/a><\/p>\n

Q.20 Define mechanical waves and give example.<\/a><\/p>\n

Q.21 What is difference between Mechanical Waves and Electromagnetic Waves?<\/a><\/p>\n

Q.22 What is the difference between longitudinal and transverse waves?<\/a><\/p>\n

Q.23 Define diffraction of waves.<\/a><\/p>\n

Q.24 Define reflection of waves.<\/a><\/p>\n

Q.25 State Hook’s law.<\/a><\/p>\n

Q.26 Define a time period. Write the formula of time period of a simple pendulum.<\/a><\/p>\n

Q.27 Define frequency and write its unit.<\/a> <\/a><\/p>\n

Q.1 What is spring constant? Write its formula?<\/strong><\/p>\n

Answer: Definition: The ratio of force (F) acting on the spring to the displacement (x ) from mean position.<\/p>\n

Formula: According to Hook’s law, F =-kx
\n<\/em>Where k is spring constant. It is defined as k = F\/x<\/p>\n

Value of k <\/em>is measurement of stiffness of the spring. It Sl unit is Nm-1\u00a0 <\/a><\/sup><\/p>\n

Q.2 Define waves equation and write its formula.<\/strong><\/p>\n

Answer: Waves equation: An equation which provides us relation between wavelength (\u03bb) frequency (f) and velocity of waves (v) is called wave
\nequation.<\/p>\n

Waves equation: \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 v = f\u03bb\u00a0 <\/a><\/p>\n

Q. 3 What is meant by wavelength?<\/strong><\/p>\n

Answer: Wavelength:<\/strong> Wavelength means length of wave.<\/p>\n

Definition:<\/strong> Wavelength is the distance between two identical adjacent crest or trough.<\/p>\n

Symbol:<\/strong> Wavelength represented by \u03bb.
\nUnit:<\/strong> The unit of wavelength is metre (m).\u00a0 <\/a><\/p>\n

Q.4 What is the function of Ripple Tank?<\/strong><\/p>\n

Answer: Ripple Tank:<\/strong> Ripple tank is a device used to produce water waves to study their characteristics (reflection, refraction, (diffraction) <\/a><\/p>\n

Q. 5 Define refraction of waves.<\/strong><\/p>\n

Answer: Refraction of waves:<\/strong> When a wave from one medium enters into the second medium at some angle, its direction of travel changes. It is called refraction of waves. <\/a><\/p>\n

Q. 6 Define Restoring Force.<\/strong><\/p>\n

Answer: Definition:<\/strong> A restoring force always pushes or pulls the object performing oscillatory motion towards the mean position.<\/p>\n

Unit:<\/strong> The unit of restoring force is Newton (N).<\/p>\n

Example:<\/strong> Suppose that mass ‘m’ is pulled through a distance ‘x’ <\/em>up to extreme position ‘A’ and then released. The restoring force exerted by the
\nspring on the mass will pull it towards to mean position. ‘O’.\u00a0 <\/a><\/p>\n

Q.7 Define vibratory motion.<\/strong><\/p>\n

Answer: Vibratory Motion:<\/strong> A body is said to be vibrating if it moves back and forth or to and fro about a point. Another term for vibration is oscillation. A special kind of vibratory or oscillatory motion is called simple harmonic motion (SHM).\u00a0 <\/a><\/p>\n

Q.8 Define SHM. Also write features of SHM.<\/strong><\/p>\n

Answer: Definition:<\/strong> Simple harmonic motion (SHM) occurs when the net force is directly proportional to the displacement from the mean position and is
\nalways directed towards the mean position.<\/p>\n

Features of SHM:<\/strong><\/p>\n

a. A body executing SHM always vibrates about a fixed position<\/p>\n

b. Its acceleration is always directed towards the mean position.<\/p>\n

c. The magnitude of acceleration is always directly proportional to its displacement from the mean position.<\/p>\n

d. Acceleration will be zero at the mean position while it will be maximum at the extreme positions.<\/p>\n

e. Its velocity is maximum at the mean position and zero at the extreme positions. <\/a><\/p>\n

Q.9 . Define simple pendulum. Write down its time period equation\/formula.<\/strong><\/p>\n

Answer: Definition:<\/strong> A simple pendulum is consist of a small bob of mass ‘m’ suspended from a light string of length T fixed at its upper end.<\/p>\n

Time period equation :<\/p>\n

\"\"\u00a0 \u00a0 <\/a><\/p>\n

Q.10 What is meant by vibration?<\/strong><\/p>\n

Answer:<\/strong> One complete round trip of a vibrating body about its mean position IS called one vibration. <\/a><\/p>\n

Q.11 Define damped oscillations. Give its two examples for daily life.<\/strong><\/p>\n

Answer: Definition: <\/strong>The oscillations of system in the presence of some resistive force arc damped oscillations.<\/p>\n

Examples:<\/strong><\/p>\n

(i)\u00a0 \u00a0 Shock absorbers in automobiles are one practical application of damped motion.<\/p>\n

(ii) \u00a0\u00a0\u00a0\u00a0 The motion of a pendulum is an example of damped motion. <\/a><\/p>\n

Q.12 Define wave motion.<\/strong><\/p>\n

Answer:<\/strong> Wave motion: A wave is disturbance in the medium which causes the particles of the medium to undergo vibratory motion about their mean
\nposition in equal intervals of time. The motion of wave is called wave motion. <\/a><\/p>\n

Q.13 Define longitudinal waves.<\/strong><\/p>\n

Answer: Longitudinal Waves:<\/strong> In longitudinal waves the particles of the medium move back and forth along the direction of propagation of waves. <\/a><\/p>\n

Q.14 Define Transverse Waves.<\/strong><\/p>\n

Answer: <\/strong>In case of transverse waves the vibratory motion of particles of the medium is perpendicular to the direction of propagation. e.g., waves on the surface of water. <\/a><\/p>\n

Q. 15 Define electromagnetic waves. Also give an example.<\/strong><\/p>\n

Answer: Definition of Electromagnetic Waves:<\/strong> Waves which do not require any medium for their propagation are called electromagnetic waves.<\/p>\n

Examples:<\/strong> Radio waves, Television waves, X-rays, heat and light waves are some examples of electromagnetic waves. <\/a><\/p>\n

Q. 16 A ball is dropped from a certain height onto the floor and keeps bouncing. Is the motion of the ball is simple harmonic? Explain.\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Answer: <\/strong>No! The ball is dropped from a certain height it does not executing simple harmonic motion. Because during its bouncing it P.E. and time period is not
\nconstant, more ever its amplitude is not constant. <\/a> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<\/strong><\/p>\n

Q.17 Define wave.<\/strong><\/p>\n

Answer: Wave:<\/strong> A wave is a disturbance in the medium which causes the particles of the medium to undergo vibratory motion about their mean position in equal
\nintervals of time. <\/a><\/p>\n

Q.18 Define Crest and Trough.<\/strong><\/p>\n

Answer: Crest:<\/strong> The crests arc the highest points of the particles of the medium from the mean position.<\/p>\n

Trough:<\/strong> The trough are the lowest points of the particles of the medium from the mean position. <\/a><\/p>\n

Q.19 What is meant by compression?\u00a0<\/strong><\/p>\n

Answer: Compression:<\/strong> Such a wave consists of regions called compression, where the loop of the spring are close together. In the regions of compression.
\nParticles of the medium are closer together. <\/a><\/p>\n

Q.20 Define mechanical waves and give example.<\/strong><\/p>\n

Answer: Mechanical Waves:<\/strong> Waves which required any medium for their propagation are called mechanical waves.<\/p>\n

Example:<\/strong><\/p>\n

    \n
  1. Waves produced on water surface.<\/li>\n
  2. \u00a0Sound waves<\/li>\n<\/ol>\n

    3. Waves produced in string and spring etc. <\/a><\/p>\n

    Q.21 What is difference between Mechanical Waves and Electromagnetic Waves?<\/strong><\/p>\n

    Answer: Mechanical Waves:<\/strong> Waves which require any medium for their propagation called mechanical waves.<\/p>\n

    Examples: <\/strong>Waves produced in string etc.
    \nElectromagnetic Waves: <\/strong>Waves which do not require any medium for their propagation are called
    \nelectromagnetic waves.<\/p>\n

    Examples: <\/strong>X-rays, radio waves etc. <\/a><\/p>\n

    Q.22 What is the difference between longitudinal and transverse waves? <\/strong><\/p>\n

    Answer: Longitudinal Waves:<\/strong><\/p>\n

    In longitudinal waves the particles of the medium move back and forth along the direction of propagation of wave.<\/p>\n

    Example: <\/strong>Sound, waves<\/p>\n

    Transverse Waves:<\/strong><\/p>\n

    In case of transverse waves, the vibratory motion of particles of the medium is perpendicular to the direction of propagation of waves.<\/p>\n

    Example: <\/strong>Waves on the surface of water and light waves. <\/a><\/p>\n

    Q.23 Define diffraction of waves.<\/strong><\/p>\n

    Answer: <\/strong>The bending or spreading of waves around the sharp edges or corners of obstacles or slits is called diffraction. <\/a><\/p>\n

    Q.24 Define reflection of waves.<\/strong><\/p>\n

    Answer: <\/strong>Reflection of waves: When waves moving in one medium fall on the surface of another medium, they bound back into the first medium such that the angle of incidence is equal to the angle of reflection. This process is called reflection of waves. <\/a><\/p>\n

    Q.25 State Hook’s law.<\/strong><\/p>\n

    Answer: Hook’s law:<\/strong> “Within the elastic limit of the body. The applied force IS
    \ndirectly proportional to the displacement.”<\/p>\n

    Mathematically<\/strong><\/p>\n

    F \u221d x <\/em><\/p>\n

    F=-kx <\/em><\/p>\n

    Here K<\/strong> is spring Constant. <\/a><\/p>\n

    Q.26 Define a time period. Write the formula of time period of a simple pendulum.<\/strong><\/p>\n

    Answer: Time Period:<\/strong> The time taken by a vibrating body to complete one vibration is called time period.<\/p>\n

    Symbol:<\/strong> Time period represented by T.<\/p>\n

    Unit:<\/strong> The unit of time period is second (s).<\/p>\n

    Formula:\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\"\"<\/strong><\/p>\n

    Time period is reciprocal of frequency i.e. T = 1\/f\u00a0 <\/a><\/p>\n

    Q.27 Define frequency and write its unit.<\/strong><\/p>\n

    Answer: Frequency:<\/strong> The number of vibrations or cycle of a vibrating body in one second is called is frequency.<\/p>\n

    Symbol:<\/strong> Frequency is represented by f.
    \nUnit:<\/strong> Unit of frequency is Hertz (Hz).<\/p>\n

    Formula:<\/strong> Frequency is reciprocal of time period f = 1\/T<\/p>\n

    Time period:<\/strong> The time taken by a vibrating. body to complete one vibration is called time period.<\/p>\n

    Unit:<\/strong> The T = 1\/f<\/p>\n","protected":false},"excerpt":{"rendered":"

    Important Short Questions From Board Papers Q.1 What is spring constant? Write its formula. Q.2 Define waves equation and write its formula. Q. 3 What is meant by wavelength? Q.4 What is the function of Ripple Tank? Q. 5 Define refraction of waves. Q. 6 Define Restoring Force. Q.7 Define vibratory motion. Q.8 Define SHM.… Read More »Physics 10th chapter 10-sq-fromboard<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"off","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":""},"categories":[9],"tags":[],"_links":{"self":[{"href":"https:\/\/murreeroad.org\/physics10\/wp-json\/wp\/v2\/posts\/1429"}],"collection":[{"href":"https:\/\/murreeroad.org\/physics10\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/murreeroad.org\/physics10\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/murreeroad.org\/physics10\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/murreeroad.org\/physics10\/wp-json\/wp\/v2\/comments?post=1429"}],"version-history":[{"count":11,"href":"https:\/\/murreeroad.org\/physics10\/wp-json\/wp\/v2\/posts\/1429\/revisions"}],"predecessor-version":[{"id":1456,"href":"https:\/\/murreeroad.org\/physics10\/wp-json\/wp\/v2\/posts\/1429\/revisions\/1456"}],"wp:attachment":[{"href":"https:\/\/murreeroad.org\/physics10\/wp-json\/wp\/v2\/media?parent=1429"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/murreeroad.org\/physics10\/wp-json\/wp\/v2\/categories?post=1429"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/murreeroad.org\/physics10\/wp-json\/wp\/v2\/tags?post=1429"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}