i. Which of the following is an example of Simple Harmonic Motion?




... Answer is (a) motion of a simple pendulum
 Simple Harmonic Motion (SHM) is defined as a periodic motion of a body along a straight line about fixed point (mean position), such that its acceleration of the body is directly proportional to the displacement of the body from the mean position and always directed towards the mean position ( a ∝ - x ) So, Here the Motion of a Simple Pendulum can only satisfies all the conditions as mentioned in the definition.


ii. If the mass of the bob of a pendulum is increases by a factor of 3, the period of the pendulum's motion will




... Answer is (b) remain the same
 The Formula for the Time Period T of Simple Pendulum is T = 2Ï€ √(L/g) This shows that Time Periods 'T' depends only on the length of Pendulum and is in depended of mass 'm' So, there will be no increase in the period of the pendulum's motion.


iii. Which of the following devices can be used to produce both a transverse and longitudinal wave?




... Answer is (c) a helical spring (slinky)
 A string and a ripple tank can produce only Transverse Wave. A Tuning Fork can produce only Longitudinal Wave. While, A helical Spring (slinky) can produce both Transverse and Longitudinal wave.


iv. Waves transfer




... Answer is (a) energy
A Wave is a disturbance in the medium that transfers energy from one place to another. Waves can only transfer energy over distance without moving particles of medium the entire distance.


v. Which of the following is the method of energy transfer?




... Answer is (d) all of these
Conduction, Radiation and Wave Motion are all the methods of energy transfer from one place to another.


vi. In a vacuum all electromagnetic waves have the same:




... Answer is (a) speed
 All Electromagnetic wave travels at the same speed which is about the speed of light i.e c = 3 x 10^8 m/sec While, frequency, amplitude and wavelength of various Electromagnetic waves are different from one another.


vii. A large ripple tank with a vibrator working at a frequency of 30 Hz produces 25 complete waves in a distance of 50cm. The velocity of the wave is:




... Answer is (b) 60 cm/sec
Given: Frequency ( f ) = 30 Hz Distance ( S ) = 50 cm Numbers of wave passing N = 25 waves Solution: Wavelength of wave is calculated as λ = Distance / Numbers of Wave λ = S / N λ = 50 cm / 25 λ = 2 cm. As Velocity (V), Frequency (f) and Wavelength are related by V = f λ = 30 Hz × 2 cm V = 60 cm/sec.


viii. Which of the following characteristics of a wave is independent of the others:




... Answer is (c) amplitude
The three quantities Velocity (V), Frequency (f) and Wavelength are related with each other by an equation v = f λ Therefore, quantity "amplitude" is independent of the others quantities.


ix. The relation between v, f and λ of a wave is




... Answer is (b) f λ = v
As by definition Velocity = distance travelled by the wave / time taken V = λ / t But f = 1 / T Therefore f λ = v I.e. Frequency x Wavelength = Velocity.
 

Note: If you are now confident to answer correctly for the above MCQs, than you can examine yourself by taking this Simple MCQS Quiz (Click here to play the Quiz)
 
© 2020-21 Academic Skills and Knowledge (ASK) (askrarenotes.blogspot.com, askrarequiz.blogspot.com, jemrarequiz.blogspot.com )