Part 8-Waves easy

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In stationary wave

Strain is maximum at nodes

Strain is maximum at antinodes

Strain is minimum at nodes

Amplitude is zero at all the points

The phase difference between the two particles situated on both the sides of a node is

0°

90°

180°

360°

Which of the property makes difference between progressive and stationary waves

Amplitude

Frequency

Propagation of energy

Phase of the wave

Stationary waves are formed when

Two waves of equal amplitude and equal frequency travel along the same path in opposite directions

Two waves of equal wavelength and equal amplitude travel along the same path with equal speeds in opposite directions

Two waves of equal wavelength and equal phase travel along the same path with equal speed

Two waves of equal amplitude and equal speed travel along the same path in opposite direction

In a stationary wave, all particles are

At rest at the same time twice in every period of oscillation

At rest at the same time only once in every period of oscillation

Never at rest at the same time

Never at rest at all

At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of string at that instant is

Sinusoidal shape with amplitude A/3

Sinusoidal shape with amplitude A/2

Sinusoidal shape with amplitude A

Straight line

The equation y=0.15 sin 5x cos 300t , describes a stationary wave. The wavelength of the stationary wave is

Zero

1.256 metres

2.512 metres

0.628 metre

In stationary waves, antinodes are the points where there is

Minimum displacement and minimum pressure change

Minimum displacement and maximum pressure change

Maximum displacement and maximum pressure change

Maximum displacement and minimum pressure change

In stationary waves all particles between two nodes pass through the mean position

At different times with different velocities

At different times with the same velocity

At the same time with equal velocity

At the same time with different velocities

A standing wave having 3 nodes and 2 antinodes is formed between two atoms having a distance 1.21 Å between them. The wavelength of the standing wave is

1.21 Å

2.42 Å

6.05 Å

3.63 Å

In stationary waves, distance between a node and its nearest antinode is 20 cm. The phase difference between two particles having a separation of 60 cm will be

Zero

π/2

π

3π/2

Stationary waves of frequency 300 Hz are formed in a medium in which the velocity of sound is 1200 metre/sec. The distance between a node and the neighbouring antinode is

1 m

2 m

3 m

4 m

A wave of frequency 100 Hz is sent along a string towards a fixed end. When this wave travels back after reflection, a node is formed at a distance of 10 cm from the fixed end of the string. The speed of incident (and reflected) wave are

40 m/s

20 m/s

10 m/s

5 m/s

y=acos (kx+ωt) superimposes on another wave giving a stationary wave having node at x = 0. What is the equation of the other wave

-acos (kx+ωt)

acos (kx+ωt)

acos (kx-ωt)

asin (kx+ωt)

Two waves are approaching each other with a velocity of 20 m/s and frequency . The distance between two consecutive nodes is

20/n

10/n

5/n

n/10

Energy is not carried by which of the following waves

Stationary

Progressive

Transverse

Electromagnetic

The stationary wave produced on a string is represented by the equation y=5 cos(πx/3) sin 40πt. Where x and y are in cm and is in seconds. The distance between consecutive nodes is

5 cm

πcm

3 cm

40 cm

Two sinusoidal waves with same wavelengths and amplitudes travel in opposite directions along a string with a speed 10 ms^–1. If the minimum time interval between two instants when the string is flat is 0.5 s, the wavelength of the waves is

25 m

20 m

15 m

10 m

“Stationary waves” are so called because in them

The particles of the medium are not disturbed at all

The particles of the medium do not execute SHM

There occurs no flow of energy along the wave

The interference effect can’t be observed

Two waves are approaching each other with a velocity of 16 m/s and frequency n. The distance between two consecutive nodes is

16/n

8/n

n/16

n/8

Stationary waves

Transport energy

Does not transport energy

Have nodes and antinodes

Both (b) and (c)

In a stationary wave all the particles

On either side of a node vibrate in same phase

In the region between two nodes vibrate in same phase

In the region between two antinodes vibrate in same phase

Of the medium vibrate in same phase

When a stationary wave is formed then its frequency is

Same as that of the individual waves

Twice that of the individual waves

Half that of the individual waves

None of the above

In stationary waves

Energy is uniformly distributed

Energy is minimum at nodes and maximum at antinodes

Energy is maximum at nodes and minimum at antinodes

Alternating maximum and minimum energy producing at nodes and antinodes

Equation of a stationary wave is y=10sin πx/4cos 20πt Distance between two consecutive nodes is

4

2

1

8

Part 8-Waves easy

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