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All posts related to Science

Rushu
Shared from BITSAT Mock - 3 on May 17, 2019 3:40 PM

Directions: The following figure shows an experimental arrangement given by Fresnel. It consists of two plane mirrors inclined at an angle of 12 minutes of arc. The distances from the mirrors' intersection to the side 'S' and the screen are 10 cm and 130 cm, respectively. The wavelength of light in Fresnel double mirrors can be looked upon as modified YDSE. Here, the two coherent sources are virtual and mirror images of S. Interference is obtained due to reflected light from the two mirrors. Interference pattern consists of alternate bright and dark fringes similar to YDSE, but with a difference that interference pattern is limited to overlapping region. Fringe width and position of maxima and minima is given by similar expression as in YDSE.



The number of possible fringes formed on the screen is

 
6
7
9
8
Please type your answer before submitting.
Rushu

Did not understand the solution

Rushu
Shared from BITSAT Mock - 3 on May 17, 2019 3:03 PM

The point charges and are placed at a separation of 7 m. The medium between them is of two type as shown in figure. What is the electric force acting between them?

 
Please type your answer before submitting.
Rushu

I did not understand the solution

G Akshay
Shared from BITSAT - 2018 on May 17, 2019 2:30 PM

An aromatic compound has molecular formula C7H7Br. Give the number of possible isomers and the appropriate method to distinguish them.

 
3 isomers; by heating with AgNO3 solution
4 isomers; by treating with AgNO3 solution
4 isomers; by oxidation
5 isomers; by oxidation
Please type your answer before submitting.
Shriya Shukla

What is oxidation method

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Tanmay Jaiswal
Shared from BITSAT Mock - 2 on May 17, 2019 2:09 PM

A small spherical steel ball is placed a little away from the centre of a large concave mirror of radius of curvature R = 2.5 m. The ball is then released. What is the time period of the motion?
(Neglect friction and take g = 10 ms-2)

 
Please type your answer before submitting.
Tanmay Jaiswal

It is good qn for me

Noobmaster69
Shared from BITSAT Mock - 9 on May 17, 2019 1:13 AM

The given reaction is fastest when X is

 
NH2
Cl
OC2H5
OCOR
Please type your answer before submitting.
Noobmaster69

OCOR negative is resonance stabilized.