wave motion + oscillations

Question 1

amplitude

Answer 1

magnitude of the maximum displacement from its equilibrium position

Question 2

period (osc)

Answer 2

time taken for one complete oscillation

Question 3

frequency (osc)

Answer 3

number of oscillations per unit time

Question 4

angular frequency (osc)

Answer 4

product of the frequency of oscillation and 2pi

Question 5

phase

Answer 5

state of oscillation of a body at a particular time

Question 6

phase difference (two oscillators/one oscillator)

Answer 6

difference in the state of oscillation between [two oscillators at a particular instant]/[one oscillator at two instances in time]

Question 7

simple harmonic motion!!

Answer 7

motion of a body such that its acceleration is proportional to its displacement from its equilibrium position, where acceleration is always opposite in direction to its displacement from equilibrium

Question 8

damping

Answer 8

the decrease in the amplitude of oscillation with time due to energy loss

Question 9

forced oscillations

Answer 9

the application of a periodic driving force to a system to make it oscillate at the frequency of the applied force rather than its natural frequency (constant forcing frequency and amplitude)

Question 10

resonance

Answer 10

when the frequency of the driving force equals the natural frequency of the oscillating system. maximum energy transfer occurs and the amplitude of oscillations of the system is at its maximum.

Question 11

displacement (wave)

Answer 11

distance in a specified direction from its equilibrium position of a particle on a wave

Question 12

period (wave)

Answer 12

time taken for a particle in a wave to complete one oscillation

Question 13

frequency (wave)

Answer 13

number of oscillations completed by each particle of the wave per unit time

Question 14

wavelength

Answer 14

shortest distance between two points on a progressive wave which are oscillating in phase

Question 15

wave speed

Answer 15

distance travelled by the wave per unit time

Question 16

progressive waves

Answer 16

energy is transferred in the direction of wave propagation by the oscillations of particles in the medium. waveform appears to be moving though particles are not transported along the wave

Question 17

transverse waves

Answer 17

the plane of oscillation of particles of the medium is at right angles to the direction of energy transfer

Question 18

longitudinal waves

Answer 18

plane of oscillation of particles in the medium is along an axis parallel to the direction of transfer of energy

Question 19

intensity

Answer 19

power per unit area transferred across an area perpendicular to the direction of energy transfer

Question 20

polarised transverse wave

Answer 20

wave where oscillations are confined to one direction only in a plane normal to the direction of energy transfer.