JAMB`S UTME 2014 PHYSICS Questions and Answers On Waves

21. The distance between two successive crests of a wave is 15cm and velocity 300m/s. Calculate the frequency.

A. 4.5X10⁵Hz 

B. 2X10³Hz  

C. 4.5X10²Hz

D. 2X10²Hz  

Answer

22.. A boy receives the echo of his clap reflected by a nearby hill 0.8s later. How far is he from the hill? [Speed of sound in air =340m/s ]

A.66m

 B. 136m

C. 264m

D. 528m

Answer

Answer

24. An object is placed 10m from a pinhole camera of length 25cm. Calculate the linear magnification.

A. 0.025

B. 0.25

C. 25

D. 250

Answer

25.The focal length of a concave mirror is 2.ocm.If an object is placed8.0cm from it, the image is at A. 2m

B. 2.3m

C. 2.5m

D. 2.7m

Answer

26. In a compound microscope, the objective and eyepiece focal lengths are

A. long  

B. short  

C. the same

D. at infinity

Answer

27. When a telescope is in normal use, the final image is at

A. the focus

 B. the radius of curvature   

C. the near point  

D. infinity

Answer