A mass of 0.50 kg attached to a spring of spring constant 200 N/m oscillates horizontally. What is the period of oscillation?
Correct answer B. 0.31 s
Subject / 480 questions
MDCAT ECAT Physics MCQs
Page 16 of MDCAT ECAT Physics multiple-choice questions with answers. Tap an option to check yourself.
Page 16 of 24
- Electromagnetic Induction 30
- Fluid Dynamics 30
- Electrostatics 30
- Electronics 30
- Electromagnetism 30
- Current Electricity 30
- Work and Energy 30
- Waves 30
- Vectors and Equilibrium 30
- Nuclear Physics 30
- Dawn of Modern Physics 30
- Thermodynamics 30
- Rotational and Circular Motion 30
- Atomic Spectra 30
- Alternating Current 30
- Force and Motion 30
A particle moves uniformly around a circle of radius 5.0 cm at 2.0 revolutions per second. What are the amplitude and frequency of the SHM performed by its projection on a diameter?
Correct answer B. 5.0 cm and 2.0 Hz
Two loudspeakers driven in phase emit sound of frequency 680 Hz. At a point, the path difference from the two speakers is 0.75 m. What is heard there (speed of sound = 340 m/s)?
Correct answer D. A minimum, due to destructive interference
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Two tuning forks of frequencies 256 Hz and 260 Hz are sounded together. How many beats are heard per second?
Correct answer D. 4
In a stationary wave, the distance between two adjacent nodes is ____.
Correct answer D. half a wavelength
Which statement about a stationary wave is correct?
Correct answer D. It does not transfer energy along the medium
A string 0.80 m long is fixed at both ends, and transverse waves travel along it at 240 m/s. What is the frequency of its fundamental mode?
Correct answer A. 150 Hz
An organ pipe 0.50 m long is closed at one end. What is its fundamental frequency (speed of sound = 340 m/s)?
Correct answer B. 170 Hz
Which harmonics can be produced by an organ pipe closed at one end?
Correct answer A. Only the odd harmonics
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A stretched string vibrates with a fundamental frequency of 200 Hz. If the tension is made four times as large with nothing else changed, what is the new fundamental frequency?
Correct answer C. 400 Hz
A body performs simple harmonic motion. Which statement about its acceleration is correct?
Correct answer D. It is proportional to displacement and directed towards the mean position
Using Laplace’s formula, what is the speed of sound in air at a pressure of 1.01 × 10⁵ Pa and density 1.29 kg/m³ (γ = 1.4)?
Correct answer B. 331 m/s
How is the speed of sound in air affected by a change in pressure at constant temperature?
Correct answer D. It is not affected
The speed of sound in air at 0 °C is 332 m/s. Taking v ∝ √T, what is the speed of sound at 273 °C?
Correct answer B. 470 m/s
Why does sound travel slightly faster in humid air than in dry air at the same temperature and pressure?
Correct answer A. Humid air has a lower density
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At the same temperature and pressure, oxygen is 16 times as dense as hydrogen. What is the ratio of the speed of sound in hydrogen to that in oxygen (assume equal γ)?
Correct answer B. 4 : 1
According to the principle of superposition, when two waves overlap the resultant displacement at any point is ____.
Correct answer A. the vector sum of the individual displacements
Two coherent sound sources vibrate in phase. At a point where their path difference is a whole number of wavelengths, what is observed?
Correct answer A. Constructive interference giving loud sound
A radio station broadcasts at 100 MHz. What is the wavelength of its waves (speed of light = 3.0 × 10⁸ m/s)?
Correct answer C. 3.0 m
In a transverse wave, the distance between a crest and the adjacent trough is 0.25 m and the frequency is 40 Hz. What is the wave speed?
Correct answer A. 20 m/s