WAEC GCE 2023 Physics Essay and Practical Questions And Answers

PHYSICS OBJ
01-10: AAACDDBCBD
11-20: ACDBCABACA
21-30: BBAABABCCA
31-40: CDABDBAADC
41-50: BBACCCDDDB

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Number 1.

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Number 3

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Number 4.

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(6a)
(i) Optical fibers are widely used in endoscopic procedures for medical imaging
(ii) They are utilized in laser surgery for delivering laser light precisely to target tissue
(iii) Optical fibers play a key role in various diagnostic imaging techniques such as Optical Coherence Tomography (OCT).

(6b)
(i) Optical fibers are extensively used in military communication systems.
(ii) They serve as the backbone for various fiber optic sensor systems used in defense applications.
(iii) They are employed in the development of underwater surveillance systems

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(7a)
A perfect blackbody refers to an idealized object that absorbs all incoming radiation across the entire electromagnetic spectrum, without reflecting or transmitting any of it.

(7b)
(PICK TWO ONLY)

(i) The peak of the intensity-wavelength graph shifts towards shorter wavelengths as the temperature increases.

(ii) The graph becomes broader and more spread out as the temperature increases.

(iii) The maximum intensity of the graph increases as the temperature increases.

(iv) At lower temperatures, the graph is skewed towards longer wavelengths, while at higher temperatures, it becomes more symmetrical.

(v) The area under the graph, representing the total radiation emitted, increases with temperature.

(vi) As the temperature increases, the wavelength at which the intensity drops to zero shifts towards shorter wavelengths.

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Number 8.

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Number 9.

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Number 10.