Question
Name the waves used in SONAR
(a) Name the waves used in SONAR. (b) In the below diagram Lata stands between two cliffs and claps her hands. Determine…
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Given are two pulleys
Given are two pulleys. (a) Copy and complete the labelled diagram connecting the two pulleys with a tackle to obtain Velocity Ratio…
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Two identical marbles A and B are rolled down along Path 1 and Path 2 respectively
Two identical marbles A and B are rolled down along Path 1 and Path 2 respectively. Path 1 is frictionless and Path…
Question
Define Centre of Gravity
(a) Define Centre of Gravity. (b) A hollow ice cream cone has height 6 cm. (i) Where is the position of its…
Question
A monochromatic ray of light is incident on an equilateral prism
A monochromatic ray of light is incident on an equilateral prism placed at minimum deviation position with an angle of incidence 45°…
Question
Light travels a distance of 10x units in time t1 in vacuum
Light travels a distance of ‘10x’ units in time ‘t1’ in vacuum and it travels a distance of ‘x’ units in time…
Question
Refractive index of glass with respect to water is 9 by 8
(a) Refractive index of glass with respect to water is . Find the refractive index of water with respect to glass. (b)…
Question
Why do we use red colour as a danger signal on the top of a skyscraper
(a) Why do we use red colour as a danger signal on the top of a skyscraper? (b) The diagram below shows…
Question
Below is an incomplete table showing the arrangement of electromagnetic spectrum
Below is an incomplete table showing the arrangement of electromagnetic spectrum in the increasing order of their wavelength. Complete the table. Gamma…
Question
The image of a candle flame placed at a distance of 36 cm from a spherical lens
The image of a candle flame placed at a distance of 36 cm from a spherical lens, is formed on a screen…