Physics
General
Easy

Question

When P-N junction diode is forward based, then.,

  1. Both the depletion region and barrier height are reduced.
  2. Both depletion region and barrier height are increased.
  3. The depletion region is winded and barrier height is reduced.
  4. The depletion region is reduced and barrier height is increased.

The correct answer is: Both the depletion region and barrier height are reduced.

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The  velocity of light in glass whose refractive index with respect to air is 1.5 is 2 cross times 10 to the power of 0 m divided by s . In a certain li liquid, the velocity of light is found to be 2.5 cross times 10 to the power of 8 m divided by s What is the refractive index of the liquid with respect to air?

The  velocity of light in glass whose refractive index with respect to air is 1.5 is 2 cross times 10 to the power of 0 m divided by s . In a certain li liquid, the velocity of light is found to be 2.5 cross times 10 to the power of 8 m divided by s What is the refractive index of the liquid with respect to air?

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The accompanying diagram shows three stages in the cardiac cycle

Which of the following sequence is correct?

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Which of the following sequence is correct?

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A beam of light is converging towards a point I on a screen. A plane parallel plate of glass whose thickness is in the direction of beam =t, refractive index=n is introduced in the path of the beam. The convergence point is shifted by .........

A beam of light is converging towards a point I on a screen. A plane parallel plate of glass whose thickness is in the direction of beam =t, refractive index=n is introduced in the path of the beam. The convergence point is shifted by .........

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The change from II to III indicates the

The given figure illustrates the changes in lung volume during the process of breathing.

The change from II to III indicates the

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Light travels through a glass plate of thickness t and having refractive index n. If C be the velocty of Light in vacuum. What is the time taken by the light of travel this thickness of glass?

Light travels through a glass plate of thickness t and having refractive index n. If C be the velocty of Light in vacuum. What is the time taken by the light of travel this thickness of glass?

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Monochromatic light of wave length traveling in a medium of reflective index n subscript 1 euters a denser medium of refractive index  n subscript 2. What is the wave length in the second medium?

Monochromatic light of wave length traveling in a medium of reflective index n subscript 1 euters a denser medium of refractive index  n subscript 2. What is the wave length in the second medium?

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Respiration involving following steps -
A. Diffusion of gases O subscript 2 end subscript and C O subscript 2 end subscript across alveolar membrane
B. Transport of gases by blood
C. Utilization of O subscript 2 end subscript by cell for catabolic reactions and resultant release of C O subscript 2 end subscript
D. Pulmonary ventilation by which atmospheric air is drawn in and C O subscript 2 end subscript rich alveolar air is released out
E. Diffusion of O subscript 2 end subscript and CO? between blood and tissues.
The correct sequence of steps is -

Respiration involving following steps -
A. Diffusion of gases O subscript 2 end subscript and C O subscript 2 end subscript across alveolar membrane
B. Transport of gases by blood
C. Utilization of O subscript 2 end subscript by cell for catabolic reactions and resultant release of C O subscript 2 end subscript
D. Pulmonary ventilation by which atmospheric air is drawn in and C O subscript 2 end subscript rich alveolar air is released out
E. Diffusion of O subscript 2 end subscript and CO? between blood and tissues.
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A bird in air looks at a fish vertically below it and inside water, is h subscript 1 the height of the bird above the surface of water and , the depth of the fish below the surface of water. If refractive index of water with respect to air be n , then what is the distance of the fish observed by the bird

A bird in air looks at a fish vertically below it and inside water, is h subscript 1 the height of the bird above the surface of water and , the depth of the fish below the surface of water. If refractive index of water with respect to air be n , then what is the distance of the fish observed by the bird

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A tank contains two different liquids which do not mix with each other as shown in figure. The lower and upper liquids are at depths h subscript 1 and h subscript 2 respectively. An object o is located at the bottom. When seen vertically from above, locate the position of image of o.

A tank contains two different liquids which do not mix with each other as shown in figure. The lower and upper liquids are at depths h subscript 1 and h subscript 2 respectively. An object o is located at the bottom. When seen vertically from above, locate the position of image of o.

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At any point P space open parentheses x subscript 1 comma y subscript 1 close parentheses on a curve if the subtangent and subnormal are equal then at that point the length of the tangent is equal to

The given point where the  subtangent and subnormal is equal is  (x1, y1).
Subtangent is the projection of tangent on x-axis.
Subnormal is the projection of normal on x-axis.
The formula of subtangent is fraction numerator y over denominator fraction numerator d y over denominator d x end fraction end fraction
The formula of subnormal is y fraction numerator d y over denominator d x end fraction
The formula for length of tangent at point (x1, y1)
L e n g t h space o f space tan g e n t space equals space open vertical bar y subscript 1 square root of 1 plus open parentheses fraction numerator d x over denominator d y end fraction close parentheses subscript x subscript 1 comma y subscript 1 end subscript end root close vertical bar
Subtangent = Subnormal
fraction numerator y over denominator fraction numerator d y over denominator d x end fraction end fraction equals y fraction numerator d y over denominator d x end fraction
space y over y equals open parentheses fraction numerator d y over denominator d x end fraction close parentheses squared
1 space equals space open parentheses fraction numerator d y over denominator d x end fraction close parentheses squared
1 space equals space open parentheses fraction numerator d x over denominator d y end fraction close parentheses squared
open parentheses fraction numerator d x over denominator d y end fraction close parentheses squared space equals space 1
L e n g t h space o f space tan g e n t space equals open vertical bar y subscript 1 square root of 1 plus open parentheses fraction numerator d x over denominator d y end fraction close parentheses squared end root close vertical bar
space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals vertical line y subscript 1 square root of 1 space plus space 1 end root vertical line
space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals y subscript 1 square root of 2
space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals square root of 2 y subscript 1

This is the required answer.

At any point P space open parentheses x subscript 1 comma y subscript 1 close parentheses on a curve if the subtangent and subnormal are equal then at that point the length of the tangent is equal to

Maths-General
The given point where the  subtangent and subnormal is equal is  (x1, y1).
Subtangent is the projection of tangent on x-axis.
Subnormal is the projection of normal on x-axis.
The formula of subtangent is fraction numerator y over denominator fraction numerator d y over denominator d x end fraction end fraction
The formula of subnormal is y fraction numerator d y over denominator d x end fraction
The formula for length of tangent at point (x1, y1)
L e n g t h space o f space tan g e n t space equals space open vertical bar y subscript 1 square root of 1 plus open parentheses fraction numerator d x over denominator d y end fraction close parentheses subscript x subscript 1 comma y subscript 1 end subscript end root close vertical bar
Subtangent = Subnormal
fraction numerator y over denominator fraction numerator d y over denominator d x end fraction end fraction equals y fraction numerator d y over denominator d x end fraction
space y over y equals open parentheses fraction numerator d y over denominator d x end fraction close parentheses squared
1 space equals space open parentheses fraction numerator d y over denominator d x end fraction close parentheses squared
1 space equals space open parentheses fraction numerator d x over denominator d y end fraction close parentheses squared
open parentheses fraction numerator d x over denominator d y end fraction close parentheses squared space equals space 1
L e n g t h space o f space tan g e n t space equals open vertical bar y subscript 1 square root of 1 plus open parentheses fraction numerator d x over denominator d y end fraction close parentheses squared end root close vertical bar
space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals vertical line y subscript 1 square root of 1 space plus space 1 end root vertical line
space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals y subscript 1 square root of 2
space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals square root of 2 y subscript 1

This is the required answer.
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The below diagram represents the human digestive system. Identify A, B, C, D and E

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A vessels of depth t is half filled with oil of refractive index n subscript 1 and the other half is filled with water (refractive index n subscript 2 ). The apparent depth of the vessel when viewed from above is…….

A vessels of depth t is half filled with oil of refractive index n subscript 1 and the other half is filled with water (refractive index n subscript 2 ). The apparent depth of the vessel when viewed from above is…….

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A plane mirror is placed at the bottom of a tank containing a liquid of refractive index n.P.  is a small object at a height h above the mirror. An observer 0, vertically above  P, outside the liquid sees P and its image in the mirror. The apparent distance between these two wall be.

A plane mirror is placed at the bottom of a tank containing a liquid of refractive index n.P.  is a small object at a height h above the mirror. An observer 0, vertically above  P, outside the liquid sees P and its image in the mirror. The apparent distance between these two wall be.

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