Jamb Physics 1998 Past Questions and Answers

Question 26:

• JAMB 1998

A steel wire of length 0.50m is stretched between two fixed points and its fundamental frequency is 200Hz. The speed of the wave in the wire is

A. 100ms^-1
B. 120ms^-1
C. 200ms^-1
D. 250ms^-1

Question 27:

• JAMB 1998

In a resonance tube experiment, if the fundamental frequency of the vibrating air column is 280Hz, the frequency of the third overtone is

A. 70Hz
B. 840Hz
C. 1120Hz
D. 1960Hz

Question 28:

• JAMB 1998

An object 0 lies at a distance m in front of concave mirror of focal length f. If m < f, then the final image obtained will be

A. Virtual and diminished
B. Magnified and erect
C. Real and inverted
D. Diminished and erect

Question 29:

• JAMB 1998

An object is placed in front of two plane mirrors inclined at an angle of 0^o. If the total number of images formed is 7, Find the value of \(\theta\)

A. 30^o
B. 45^o
C. 51^o
D. 90^o

Question 30:

• JAMB 1998

The most suitable type of mirror used for the construction of the search light is the

A. Concave mirror
B. Convex mirror
C. Spherical mirror
D. Parabolic mirror