Waves

For a given medium, the frequency of a wave is: 

A. independent of wavelength 

B. proportional to wavelength 

C. inversely proportional to wavelength 

D. proportional to the amplitude 

E. inversely proportional to the amplitude 

Unification of electromagnetic and weak nuclear forces was done by

A. Maxwell

B. Faraday

C. Kirchhoff

D. Abdus-Salam

A complete cycle of wave is around 

A. 90° 

B. 180° 

C. 45° 

D. 360°

A long string is constructed by joining the ends of two shorter strings. The tension in the strings is the same but string I has 4 times the linear mass density of string II. When a sinusoidal wave passes from string I to string II: 

A. the frequency decreases by a factor of 4 

B. the frequency decreases by a factor of 2 

C. the wavelength decreases by a factor of 4 

D. the wavelength decreases by a factor of 2 

E. the wavelength increases by a factor of 2

Wave speed is directly proportional to

A. frequency

B. amplitude

C. wavelength

D. energy

The time required for a small pulse to travel from A to B on a stretched cord shown is NOT altered by changing: 

A. the linear mass density of the cord 

B. the length between A and B 

C. the shape of the pulse 

D. the tension in the cord 

E. none of the above (changes in all alter the time)

Any point on a string carrying a sinusoidal wave is moving with its maximum speed when: 

A. the magnitude of its acceleration is a maximum 

B. the magnitude of its displacement is a maximum 

C. the magnitude of its displacement is a minimum 

D. the magnitude of its displacement is half the amplitude 

E. the magnitude of its displacement is one-fourth the amplitude

The sum of two sinusoidal traveling waves is a sinusoidal traveling wave only if: 

A. their amplitudes are the same and they travel in the same direction. 

B. their amplitudes are the same and they travel in opposite directions. 

C. their frequencies are the same and they travel in the same direction. 

D. their frequencies are the same and they travel in opposite directions. 

E. their frequencies are the same and their amplitudes are the same.

Speed at which stars and galaxies are moving away from us is determined by phenomena of

A. blue shift

B. yellow shift

C. red shift

D. orange shift

The speed of a sinusoidal wave on a string depends on: 

A. the frequency of the wave 

B. the wavelength of the wave 

C. the length of the string 

D. the tension in the string 

E. the amplitude of the wave