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Shubhrajyoti Ghosh
Subject: Physics
, asked on 13/3/18
No links please:
Q. Write down the name of the magnetic elements of earth. The angle of declination at a place is 20
o
; calculate the horizontal and vertical components of geomagnetic intensity in geographical meridian. given
I
E
=
0
.
2
×
10
-
4
T
and angle of dip 60
o
.
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 13/3/18
No links please
At the corner A of square ABCD of side 10cm is placed a charge of +200 e.s.u.
Another charge of -100 e.s.u. is located at the centre of the square.Find the
work done in carrying a charge of +15 e.s.u. from the corner C to the corner B
of the square.
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 13/3/18
No links please
Q.
Two lenses of focal lengths 10 cm and 60 cm are used in construction of a telescope. Which lens will be used as an objective and why ?
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 12/3/18
No links please
9. From mirror formula show that a concave mirror produces magnified, virtual and erect image of an object when placed in between pole and focus of the mirror .
Answer
1
Jahanvi
Subject: Physics
, asked on 7/3/18
Answer me fast....
A symmetric biconvex lens of radius of curvature R and made of glass of refractive index 1
·
5, is placed on a layer of liquid placed on top of a plane mirror as shown in the figure. An optical needle with its tip on the principal axis of the lens is moved along the axis until its real, inverted image coincides with the needle itself. The distance of the needle from the lens is measured to be x. On removing the liquid layer and repeating the experiment, the distance is found to be y. Obtain the expression for the refractive index of the liquid in terms of x and y.
Answer
1
Sofiya Parihar
Subject: Physics
, asked on 6/3/18
Answer question 3.
Answer
1
Aparna Sahu
Subject: Physics
, asked on 6/3/18
Solve this.
A ray of light strikes a plane mirror at an angle of incidence of 35
0
. If the mirror is rotated through 10
0
, through what angle is the reflected ray rotate?
Answer
1
Aparna Sahu
Subject: Physics
, asked on 6/3/18
Solve this.
A glass plate 0.9cm thick has a refractive index of 1.50. how long does it take for a pulse of light to pass through the plate?
Answer
2
Tanaya
Subject: Physics
, asked on 6/3/18
Ques 7
(7) The focal length of a convex lens made of glass is 20 cm. What will be its new
focal length when placed in a medium of refractive index 1.25?
or
The following data was recorded for values of object distance and the corresponding values of image distance in the experiment on study of real image formation by a convex lens of power + 5 D. One of these observation is incorrect. Identify this observation and give reason for your choice.
sr no
1
2
3
4
5
6
object distance (cm)
25
30
35
45
50
55
image distance (cm)
97
61
37
35
32
30
Answer
1
Mitali
Subject: Physics
, asked on 6/3/18
Q. You are given the following three lenses. Which two lenses will you use as an eyepiece and as an objective to construct a compound microscope?
Lenses
Power (D)
Aperture (cm)
L
1
3
8
L
2
6
1
L
3
10
1
Answer
1
Keerthana Baskar
Subject: Physics
, asked on 6/3/18
Q. The line AB in the ray diagram represents a lens. State whether the lens is convex or concave.
Answer
2
Tanya Pandey
Subject: Physics
, asked on 5/3/18
What is the intensity at any general point in constuctive interference i need the general formula
Answer
2
Rayyan Mansuri
Subject: Physics
, asked on 5/3/18
Please answer by deriving this .... of marks as indicated ...
Q.
Write the equation or magnetic force acting on a particle moving through a magnetic field. Using it obtain Newton's equation of motion and Find kinetic energy of the particle with respect to time.
Answer
1
Fariya Reza
Subject: Physics
, asked on 4/3/18
The refracting angle of glass prism is 60 degrees and n of the material is 1.45. Calculate the angle of incidence at the first face that will just reflect internally at the second face
Answer
1
Ketul
Subject: Physics
, asked on 3/3/18
A convex lens is placed over a plane mirror a pin is now positioned so that there is no parallax between the pin and its image formed by this lens mirror combination how can this observation be used to find the focal length of the convex lens?give appropriate reasons in support of ur answer
Answer
1
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What are you looking for?
Q. Write down the name of the magnetic elements of earth. The angle of declination at a place is 20o; calculate the horizontal and vertical components of geomagnetic intensity in geographical meridian. given
and angle of dip 60o.
At the corner A of square ABCD of side 10cm is placed a charge of +200 e.s.u.
Another charge of -100 e.s.u. is located at the centre of the square.Find the
work done in carrying a charge of +15 e.s.u. from the corner C to the corner B
of the square.
Q. Two lenses of focal lengths 10 cm and 60 cm are used in construction of a telescope. Which lens will be used as an objective and why ?
9. From mirror formula show that a concave mirror produces magnified, virtual and erect image of an object when placed in between pole and focus of the mirror .
A symmetric biconvex lens of radius of curvature R and made of glass of refractive index 15, is placed on a layer of liquid placed on top of a plane mirror as shown in the figure. An optical needle with its tip on the principal axis of the lens is moved along the axis until its real, inverted image coincides with the needle itself. The distance of the needle from the lens is measured to be x. On removing the liquid layer and repeating the experiment, the distance is found to be y. Obtain the expression for the refractive index of the liquid in terms of x and y.
A ray of light strikes a plane mirror at an angle of incidence of 350. If the mirror is rotated through 100, through what angle is the reflected ray rotate?
A glass plate 0.9cm thick has a refractive index of 1.50. how long does it take for a pulse of light to pass through the plate?
(7) The focal length of a convex lens made of glass is 20 cm. What will be its new
focal length when placed in a medium of refractive index 1.25?
or
The following data was recorded for values of object distance and the corresponding values of image distance in the experiment on study of real image formation by a convex lens of power + 5 D. One of these observation is incorrect. Identify this observation and give reason for your choice.
Q. The line AB in the ray diagram represents a lens. State whether the lens is convex or concave.
Q. Write the equation or magnetic force acting on a particle moving through a magnetic field. Using it obtain Newton's equation of motion and Find kinetic energy of the particle with respect to time.