class 10 physics

According to the principle of reversibility of light, the path of a ray of light is reversible. The figure below shows how light gets refracted from medium 1 to medium ..

The power is the rate of doing work or in other words, it is the work done in one second. If a current of 'I' amperes flow through a conductor of resistance 'R' ohm for a time 't' seconds when the potential difference across its ends is 'V' volt, then the electric power consumed Using ohm's law, 'P..

The ratio of the height of the image to the height of the object is called the linear magnification. It is denoted by the letter m. While deriving the mirror formula it has been proved that D ACB and D A 1 CB 1 are similar and so also D FB 1 A 1 and D FED are similar. Where h 1 is the height of the..

Let a ray of light AB be incident, parallel to the principal axis, on a convex mirror. After reflection the ray AB appears to come from F. BC is the normal to the convex mirror at B. From equations (2) and (3) Hence triangle BCF is isosceles BF = CF ------- (4) ..

If the resistors are connected in parallel, the reciprocal of the equivalent resistance is equal to the sum of the reciprocals of all the individual resistances. This result can be generalized for any n number of resistors. From the above derivations we find that if we want to increase the resistan..

Magnification is the ratio of the size of the image (h I ) to the size of the object (h o ) Magnification produced by a lens can be equal to one, greater than one or less than one depending upon the size and nature of the ima..

Magnification - Magnification is the ratio of the size of the image (h I ) to the size of the object (h o ) Magnification produced by a lens can be equal to one, greater than one or less than one depending upon the size and nature of the ima..

Radioisotopes - Naturally occurring radioactive substances have high nucleon number. It is possible to make artificial radioactive substances by bombarding lighter nuclides with - particles, protons or neutrons. The radioactive substances produced in this manner are known as radioisotopes. A nuclid..

Binding Energy - The nucleus is made of neutrons and protons. What causes them to stick together? Why do the protons not repel each other? Surprisingly, the mass of the nucleus is less than the sum of the masses of the individual protons and neutrons which makeup the nucleus. The lost mass (mass de..

Verification of the Laws of Reflection - Fix a sheet of white paper on a drawing board. Draw a line MM' on it and mark a point O at the center of the line and a normal ON on MM'. Draw IO, the incident ray in such a way that is less than 90 0 . Place a strip of plane mirror vertically with its silve..