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1576

When the tension in a sonometer wire is doubled, the ratio of the new frequency to the initial frequency is?

A. \(\frac{1}{\sqrt2}\)
B. \(\frac{1}{2}\)
C. \(\sqrt2\)
D. 2

View Answer & Discuss (14) JAMB 1989

1577

In a sound wave in air, the adjacent rarefactions and compressions are separated by a distance of 17cm. If the velocity of the sound wave is 340ms^-1. Determine the frequency

A. 10Hz
B. 20Hz
C. 1000Hz
D. 5780Hz

View Answer & Discuss (14) JAMB 1989

1578

Light of wavelength 5000 x 10^-8cm travels in free space with a velocity of 3 x 10⁸ms^-1. What is its wavelength in glass of refractive index 1.5?

A. 3333 x 10^-8cm
B. 5000 x 10^-8cm
C. 6666 x10^-8cm
D. 750010^-8cm

View Answer & Discuss (5) JAMB 1989

1579

The magnification of the image of an object placed in front of a convex mirror is \(\frac{1}{3}\). If the radius of curvature of the mirror is 24cm, what is the distance between its object and its image?