Physics-

#### A rectangular tank of depth 8 meter is full of water (), the bottom is seen at the depth

Physics-General

- m
- 10
*cm*
- 8
*cm*
- 6m

*cm**cm*#### Answer:The correct answer is: 6m

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maths-

#### Values of is :

#### Values of is :

maths-General

physics-

#### Immiscible transparent liquids A, B, C, D and E are placed in a rectangular container of glass with the liquids making layers according to their densities. The refractive index of the liquids are shown in the adjoining diagram. The container is illuminated from the side and a small piece of glass having refractive index 1.61 is gently dropped into the liquid layer. The glass piece as it descends downwards will not be visible in

Refractive index of liquid

*C*is same as that of glass piece. So it will not be visible in liquid*C.*#### Immiscible transparent liquids A, B, C, D and E are placed in a rectangular container of glass with the liquids making layers according to their densities. The refractive index of the liquids are shown in the adjoining diagram. The container is illuminated from the side and a small piece of glass having refractive index 1.61 is gently dropped into the liquid layer. The glass piece as it descends downwards will not be visible in

physics-General

Refractive index of liquid

*C*is same as that of glass piece. So it will not be visible in liquid*C.*chemistry-

#### A photon of energe12.75ev is completely absorbed by a hydrogen atom initially in ground sate. The principle quantum number of the excited state is:

#### A photon of energe12.75ev is completely absorbed by a hydrogen atom initially in ground sate. The principle quantum number of the excited state is:

chemistry-General

chemistry-

#### A certain electronic transition from an excited statetothegroundstateoftheH_{2 }atom in one or more steps gives rise to four lines in the ultra violet region of the spectrum, how many lines does this transition produce in the infrared region of the spectrum-

#### A certain electronic transition from an excited statetothegroundstateoftheH_{2 }atom in one or more steps gives rise to four lines in the ultra violet region of the spectrum, how many lines does this transition produce in the infrared region of the spectrum-

chemistry-General

chemistry-

#### Find out ratio of following for photon (^{ν}max.) Lyman: (^{ν}max) Brackett-

#### Find out ratio of following for photon (^{ν}max.) Lyman: (^{ν}max) Brackett-

chemistry-General

chemistry-

#### For H- atom, the energy required for the removal electron from various sub-shells is given at under:

The order of the energies would be:

#### For H- atom, the energy required for the removal electron from various sub-shells is given at under:

The order of the energies would be:

chemistry-General

chemistry-

#### In P-atom find out the no. of paired electrons for l=1 and m =0-

#### In P-atom find out the no. of paired electrons for l=1 and m =0-

chemistry-General

chemistry-

#### Which statement is not correct for n=5,m=2:

#### Which statement is not correct for n=5,m=2:

chemistry-General

chemistry-

#### The potential energies of first, second and third Bohr’s orbits of He^{+} cation are E_{1},E_{2 }and E_{3}. The correct sequence of these energies is-

#### The potential energies of first, second and third Bohr’s orbits of He^{+} cation are E_{1},E_{2 }and E_{3}. The correct sequence of these energies is-

chemistry-General

physics-

#### In the adjoining diagram, a wavefront *AB*, moving in air is incident on a plane glass surface *XY*. Its position *CD* after refraction through a glass slab is shown also along with the normals drawn at *A* and *D*. The refractive index of glass with respect to air () will be equal to

In the case of refraction if

.....(i)

But in .....(ii)

while in .....(iii)

From equations (i), (ii) and (iii)

Also

*CD*is the refracted wave front and*v**and*_{1}*v**are the speed of light in the two media, then in the time the wavelets from*_{2}*B*reaches*C*, the wavelet from*A*will reach*D*, such that.....(i)

But in .....(ii)

while in .....(iii)

From equations (i), (ii) and (iii)

Also

#### In the adjoining diagram, a wavefront *AB*, moving in air is incident on a plane glass surface *XY*. Its position *CD* after refraction through a glass slab is shown also along with the normals drawn at *A* and *D*. The refractive index of glass with respect to air () will be equal to

physics-General

In the case of refraction if

.....(i)

But in .....(ii)

while in .....(iii)

From equations (i), (ii) and (iii)

Also

*CD*is the refracted wave front and*v**and*_{1}*v**are the speed of light in the two media, then in the time the wavelets from*_{2}*B*reaches*C*, the wavelet from*A*will reach*D*, such that.....(i)

But in .....(ii)

while in .....(iii)

From equations (i), (ii) and (iii)

Also

maths-

#### If

#### If

maths-General

physics-

An antenna behaves as resonant circuit only when its length is

An antenna behaves as resonant circuit only when its length is

physics-General

maths-

#### In

#### In

maths-General

maths-

#### In

#### In

maths-General

maths-

#### Tangents drawn to parabola = 4ax at the points A and B intersect at C. Ordinate of A, C and B forms

Clearly, both the lines pass through (-a, b) which is a point lying on the directrix of the parabola.

C (a, a())

Clearly the ordinates of A,C, B are in A.P.

C (a, a())

Clearly the ordinates of A,C, B are in A.P.

#### Tangents drawn to parabola = 4ax at the points A and B intersect at C. Ordinate of A, C and B forms

maths-General

Clearly, both the lines pass through (-a, b) which is a point lying on the directrix of the parabola.

C (a, a())

Clearly the ordinates of A,C, B are in A.P.

C (a, a())

Clearly the ordinates of A,C, B are in A.P.