by Sunday | Nov 10 | Physics JAMB
A. 3.0 cm B. 8.0 cm C. 12.0 cm D. 16.0 cm Correct Answer: Option C = 12.0 cm Explanation Magnification = (image height)/object height = (lenght camera)/object distance from pin-hole ∴(2)/4 = (6)/X X (4 x 6)/2 = 12...
by Sunday | Nov 10 | Physics JAMB
I. Total internal reflection of light. II. Conservation of light energy. III. Relative motion of the earth, sun and moon. IV. Rectilinear propagation of light. A. I and IV only B. II and IV only C. I and III only D. III and IV only Correct Answer: Option D = III and...
by Sunday | Nov 10 | Physics JAMB
A. wavelength B. harmonies C. frequency D. velocity Correct Answer: Option B = harmonies Explanation Timber/ quality depends on the overtones or harmonics, and timber is a characteristic property of source of sound.
by Sunday | Nov 10 | Physics JAMB
A. 12.4 m B. 15.7 m C. 17.5 m D. 18.6 m Correct Answer: Option B – 15.7 m Explanation Comparing y = 5sin (200 πt – 0.4X) with the wave equation y = A sin (wt -KX) K = (2π)/λ = 0.4 ∴ λ = (2π)/0.4 =...
by Sunday | Nov 10 | Physics JAMB
A. conduction through the cork B. the plastic base of the thermos flask C. the silvered walls and shiny metals D. the outer cover or jacket Correct Answer: Option A – conduction through the cork Explanation Since the cork is in contact with the walls of the...
by Sunday | Nov 10 | Physics JAMB
A. 25% B. 33% C. 75% D. 82% Correct Answer: Option C – 75% Explanation Relative Humidity = (S.V.P. of water at dew point)/S.V.P of water at air temperature =(18)/24 x 100% = 75%
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