STANDING WAVES & BEATS

The distance between any two consecutive crests or troughs is called:

• Frequency

• Time period

• Wave length

• Phase difference

In vibrating cord the points where the amplitude is maximum, are called:

• Antinodes

• Nodes

• Troughs

• Crests

If stretching force T of wire increases, then its frequency:

• Decreases

• Increases

• Remains the same

• None of these

A stationary wave is set up in the air column of a closed pipe. At the closes end of the pipe:

• Always an node in formed

• Always an antinode is formed

• Neither node nor antinode is formed

• Sometimes a node and sometimes an antinode is formed

On loading the prong of a tuning fork with wax its frequency:

• Increases

• Decreases

• Remains unchanged

• May increase or decrease

Which one is the correct relation for fundamental frequency of open and closed pipe?

• f(open) = 2 f(closed)

• f(open) = 2 f(closed)

• f(open) = f(closed)

• f(open) = 1 / f (closed)

In open organ pipe:

• only even harmonics are present

• only odd harmonics are present

• both even and odd harmonics are present

• selected harmonics are present

The speed of stationary waves in a stretched string are independent of:

• Number of loops

• Tension in the string

• Point where string is plucked

• both Number of loops and the point where string is plucked

Fundamental frequency of stationary waves in open pipe is ________ times the frequency in closed pipe.

• One

• Two

• Four time

• None of these

The standing waves can be produced:

• On a string clamped at both the ends.

• On a string clamped at one end and free at the other end.

• When two identical waves with a phase difference of K are moving in the same direction

• All of these