Jamb Physics 1993 Past Questions and Answers

Question 16:

• JAMB 1993

Determine the distance between the consecutive antinodes XX if the wavelength is 60cm

A. 15cm
B. 30cm
C. 60cm
D. 120cm

Question 17:

• JAMB 1993

Which of the following waves can propagate through a vacuum?

A. High velocity sound waves
B. Ultrasonic waves
C. Acoustic waves
D. Infra-red waves

Question 18:

• JAMB 1993

Radio waves emitted from an antenna are picked up by a radar after reflection from an aircraft in 4 x 10^-3S. How far is the aircraft from the antenna? [c = 3 x 10⁸ms^-1 ]

A. 6.0 x 10²ms^-1
B. 1.2 x 10³km
C. 3.0 x 10³km
D. 6.0 x 10 ⁵km

Question 19:

• JAMB 1993

Which of the following expressions gives the linear magnification produced by a concave mirror of radius of curvature r, if U and V are the object and image distances respectively?

A. \(\frac{V}{r}\) - 1
B. \(\frac{2V}{r}\) - 1
C. \(\frac{U}{r}\) - 1
D. \(\frac{2U}{r}\) - 1

Question 20:

• JAMB 1993

If the focal length of a camera lens is 20cm, the distance from the film at which the lens must be set to produce a sharp image of an object 100cm away is

A. 17cm
B. 20cm
C. 25cm
D. 100cm