ICSE Class 8 Physics Question Paper. We covered all the ICSE Class 8 Physics Question Paper in this post for free so that you can practice well for the exam.
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ICSE Class 8 Physics Mock Test for Students
Two interfering waves have amplitudes in the ratio 5 : 1. The ratio of the maximum to minimum intensity is :
(A) 25 : 1
(B) 9 : 4
(C) 4 : 9
(D) 6 : 5
Option b – 9 : 4
The optical path difference between two light waves interfering at a point is 2945 A°. Which of the following will be the wavelength used to give dark illumination at that point :
(A) 0.2945 micron
(B) 0.5890 micron
(C) 0.6000 micron
(D) 0.5420 micron
Option b – 0.5890 micron
The center of a clear and steady interference pattern is :
(A) perfectly dark
(B) perfectly bright
(C) partially dark
(D) brightness changes continuously
Option b – perfectly bright
Interference of light was first of all experimentally observed by :
(A) Huygen
(B) Young
(C) Fresnel
(D) Newton
Option b – Young
A point is situated at 6.5cm and 6.65 cm from two coherent sources. What is the nature of illumination at that point if the wavelength of light is 5000A°?
(A) Bright
(B) Dark
(C) Bright and dark
(D) Cannot be predicated
Option a – Bright
The path difference between two identical waves arriving at a point is different by 93 wavelengths. If the path difference is 0.0465 mm what is the wavelength of light :
(A) 5000 A°
(B) 4971 A°
(C) 3940 A°
(D) 2000 A°
Option a – 5000 A°
Two monochromatic light waves of amplitudes A and 2A interfering at a point, have a phase difference of 60°. The intensity at that point will be proportional to
(A) 7A²
(B) 3A²
(C) A²
(D) 9 A²
Option a – 7A²
When two waves reach a point, the point will be dark if the path difference between the waves is :
(A) 15 wavelength
(B) 27 wavelength
(C) 7/2 wavelength
(D) 1/7 wavelength
Option c – 7/2 wavelength
An interference pattern produced will be of the following type. Two candles are used for producing it :
(A) no interference
(B) sustained interference
(C) temporary interference
(D) steady interference
Option a – no interference
We covered all the icse class 8 physics question paper above in this post for free so that you can practice well for the exam.
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