Science (English Medium) इयत्ता १२ - CBSE Question Bank Solutions

With the help of a ray diagram, obtain the relation between its focal length and radius of curvature.

Find the Q-value and the kinetic energy of the emitted α-particle in the α-decay of `""_86^220"Rn"`.

Given `"m"(""_88^226"Ra")` = 226.02540 u, `"m"(""_86^222 "Rn")` = 222.01750 u, 

`"m"(""_86^220 "Rn")`= 220.01137 u, `"m"(""_84^216 "Po")`= 216.00189 u.

Electric Potential V at a point in an electrical field is ______.

Electric potential is potential energy ______.

Electric potential at a distance r from a point charges q is _________.

In a system of n point charges electric potential at a point P having a distance r_i from the charge q_i is ________.

According to Cartesian sign convention, all distances are measured from the _______.

Focal length of a mirror is given by ______.

According to the mirror equation, ______.

Atomic mass unit (u) is defined as ________ of the mass of the carbon (¹²C) atom.

Nuclear species or nuclides are shown by the notation ________ where X is the chemical symbol of the species.

\[\ce{^197_79Au}\] contains ______.

The nuclei of isotopes of a given element contain the same number of ______.

All nuclides with same mass number A are called ______.

Nuclides with same neutron number N but different atomic number Z are called ______.

A nucleus of mass number A has a radius R such that ______.

The total current in a semiconductor is ______.

The electric potential inside a conducting sphere ______.

Which of the following about potential at a point due to a given point charge is true?

The potential at a point P due to a given point charge ______.