List of top Questions asked in MPBSE Class XII Board

Derive an expression for the refractive index of a glass prism.
OR
Derive the lens maker formula for thin lenses.
Write answer of each question in one sentence: What is the affect of temperature on drift velocity?
Write answer of each question in one sentence: Give relations between energy and frequency of a radiation.
What is Photoelectric effect? Write Einstein's photoelectric equation.
OR
What is de-broglie matter wave? Write de-broglie wave relation.
What is isotopes? Write any two isotopes of hydrogen atom.
OR
What is Isobar? Give example.
What is a fundamental charge? Write its value.
OR
Where will an electron move in an electric field, either high potential side or low potential side? And why?
Write Bio-Savart expansion in vector form.
OR
Why there is no end point of magnetic field lines?
Write True or False:
The average power supplied to an inductor over one complete cycle is zero.
Write True or False:
Working of microwave oven is based on Radio wave.
Write answer of each question in one sentence: What is threshold frequency?
Write answer of each question in one sentence: What is diffraction?
Write answer of each question in one sentence: What is the unit of power of lens?
Write answer of each question in one sentence: What is direction of magnetic dipole moment of a magnet?
Write answer of each question in one sentence: How Galvanometer is changed in a voltmeter?
The \(\underline{\hspace{3cm}}\) of the galvanometer is reduced by the use of shunt.
Write True or False:
Infrared radiation is invented by scientist Retar.
Write True or False:
In an intrinsic semiconductor the number of free electrons is equal to the number of holes.
Write True or False:
Voltmeter is more superior to potentiometer.
Write True or False:
De-broglie waves are an electromagnetic wave.
Write True or False:
Atom is a positive particle.
The focal length of eye piece in telescope \(\underline{\hspace{3cm}}\) the focal length of the objective.
The ohmic resistance of an ideal inductance is \(\underline{\hspace{3cm}}\).
The frequency of a Direct Current is \(\underline{\hspace{3cm}}\).
Electromagnetic wave of highest frequency is \(\underline{\hspace{3cm}}\).
The frequency of the light wave is order of \(\underline{\hspace{3cm}}\).