Question # 1

The waves produced in a microwave oven have wavelength.

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12 mm

12 cm

12 m

12 mm

If F=0.04 N and X=4 cm then K=

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1 Nm^-1

2 Nm^-1

3 Nm^-1

4 Nm^-1

The example of mechanical wave is

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waves in ropes

waves on water surface

waves in air

all of them

There is no net transfer of energy by particle of medium in

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Longitudinal wave

Transverse wave

Progressive wave

Stationary wave

Data transmitted along glass-fiber cables is in the form of pulses of monochromatic red light each of duration 2.5 ns. Which of the following is the best estimate of the number of wavelength in each pulse?

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10³

10⁶

10⁹

10¹²

With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the propagation direction are

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Energy, momentum and mass

Energy

Energy and mass

Energy and linear momentum

A heavily damped system has a fairly

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sharp resonance curve

flat resonance curve

both of them

none of them

When a body moves to and fro motion, this type of motion is called

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translatory motion

circular motion

oscillatory motion

all of them

When half of the cycle of a body executing S.H.M is completed, then the phase of the vibration will be

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45°

90°

135°

180°

The waves which propagate out in space due to oscillation of electric and magnetic fields are known as

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e.m. waves

mechanical waves

sound waves

water waves

Crests and troughs are formed in:

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Longitudinal waves

Transverse waves

Both of these

None of these

If the length of second pendulum becomes four times then its time period will become

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Four time

Two times

Six times

Eight times

For production of beats the two sources must have

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Different frequencies and same amplitude

Different frequencies

Different frequencies, same amplitude and same phase

Different frequencies and same phase

The bob of a simple pendulum is suspended by

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string

heavy inextensible string

light extensible string

light inextensible string

Two sources of sound are said to be coherent if

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The produce sounds of equal intensity

They produce sounds of equal frequency

They produce sound waves vibrating with the same phase

They produce sound waves with zero or constant phase difference all instant of time

When an oscillatory motion repeats itself, then this type of motion is called

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vibratory motion

constant motion

fixed motion

periodic motion

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ECAT Physics Chapter 8 Waves Online Test MCQs With Answers

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