(A) 2: 1
(B) 1: 2
(C) 1: 1
(D) 4: 1
Category: Physics Mcqs
Physics Mcqs for NTS, PPSC, FPSC, CSS, PMS, Educators, SPSC, Lecturer, BPSC, AJKPSC, PTS, PST, EST, SST and all other exams. Users will find mcqs related to mechanics, Thermodynamics, Photonics, study of heat, Distance, work, force, time, machines, study of electricity, magnetism, law of motion, nuclear physics, Quantum, relativity, solar system, and all the topics will be covered in the physics mcqs section.
The frequency of the note produced by plucking a given string increases as:
(A) The length of the string increases
(B) The tension in the string increases
(C) The tension in the string decreases
(D) The mass per unit length of the string increases
A pipe is open from both ends, if the fundamental frequency is 10hz, find the length of the pipe, where speed of sound is 450m/s:
(A) 45m
(B) 2.25m
(C) 11.25m
(D) 100cm
A observer is moving away from stationary source with speed ‘v’ of speed of sound, its frequency changed will be:
(A) f
(B) f/2
(C) 2f
(D) zero
When one end of organ pipe of length 2m is closed, then the wavelength of stationary wave of 3rd harmonic is:
(A) 8
(B) 4
(C) 8/3
(D) 8/5
An air column in a pipe, which is closed at one end, will be in resonance with a vibrating tuning fork of frequency 256 Hz, if the length of the column in cm is (velocity of sound in air= 340m/s ) :
(A) 21.25
(B) 125
(C) 62.50
(D) 33.2
Phase difference between tow particles of a medium lying between two consecutive nodes in:
(A) 0
(B) π / 4
(C) π / 2
(D) π
A man standing between two cliffs claps his hands and starts hearing a series of echoes at intervals of one second. If speed of sound in air is 340 m/s, then distance between the cliffs is:
(A) 340 m
(B) 680 m
(C) 1020 m
(D) 1360 m