Waec Physics 2016 Past Questions and Answers

Question 26:

• WAEC 2016

X-rays and infrared rays are both electromagnetic. Which common property do the waves have? Both waves

A. Are longitudinal
B. Have same frequency
C. Have the same wavelength
D. Travel at the same speed in a vacuum

Question 27:

• WAEC 2016

The image formed by a concave mirror is real, inverted and magnified, when object is placed

A. At the focus
B. At the centre of curvature
C. Beyond the centre of curvature
D. Between the centre of curvature and the focus

Question 28:

• WAEC 2016

Total internal reflection. i. is a phenomenon of refraction of light. ii. occurs when light rays travel into a denser medium. iii. occurs when the critical angle is just exceeded. iv. is a phenomenon of reflection of light. Which of the statements above are correct?

A. I and ii only
B. I and iii only
C. I, ii and iii only
D. I, iii and iv only

Question 29:

• WAEC 2016

Complementary colours are those which

A. Have the same refractive index
B. Have the same wavelength
C. Add-up to produce black light
D. Add-up to produce white light

Question 30:

• WAEC 2016

The diagram given illustrates the waveform of a note produced by vibrations in an air column of length L. If the speed of sound in air is V, derive an expression for the frequency of the notes

A. \(\frac{V}{L}\)
B. \(\frac{5VL}{2}\)
C. \(\frac{5L}{4V}\)
D. \(\frac{5V}{4L}\)