Jamb Physics 1978 Past Questions and Answers

Question 41:

• JAMB 1978

Which of the following is true for the image formed by a convex mirror? i. the image is always virtual ii. the image is always erect iii. the image lies between pole and focus iv. the image is never magnified v. the focus length is negative

A. I only
B. I and ii only
C. Ii and iii only
D. I, ii, iii and iv only
E. All five

Question 42:

• JAMB 1978

The angular dispersion of a prism depends on

A. The index of refraction only
B. The angle of incidence as well as the index of refraction
C. The angle of incidence only
D. The thickness of the prism
E. The prism angle

Question 43:

• JAMB 1978

A string is sustaining a stationary wave when

A. The frequency of the wave is not proportional to the wavelength of the wave
B. The amplitude of vibration is always zero
C. Two equal waves are travelling in opposite directions
D. The waves are longitudinal
E. The frequency is directly proportional to the length of the string

Question 44:

• JAMB 1978

For the correction of myopic defects in the human eye we require

A. A convex lens
B. A concave lens
C. A combination of concave and convex lenses
D. A prism
E. A concave mirror

Question 45:

• JAMB 1978

Of the following which is different from the other?

A. X-rays
B. Gamma-rays
C. Cathode rays
D. Ultra violet rays
E. Infrared rays