List of top Questions asked in MPBSE Class XII Board- 2023

A light bulb is rated at 200 W for a 220 V supply. Find the resistance of the bulb.
OR
A light bulb is rated at 200 W for a 220 V supply. Find the rms current through the bulb.
Compare the resistance of 100 watt and 400 watt of two bulbs if their voltage is same.
OR
What will be the resistance of a wire if their length changes to half of their original length and cross-sectional area changes two times of original?
Write any three differences between electromotive force and potential difference.
OR
Write any three differences between Resistance and Specific Resistance.
Derive an expression for Coulomb's law of electrostatics by Gauss's law.
OR
What is capacity of a conductor? Write the factors affecting the capacity of a conductor.
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 answer of each question in one sentence: What is the affect of temperature on drift velocity?
What is isotopes? Write any two isotopes of hydrogen atom.
OR
What is Isobar? Give example.
Write Bio-Savart expansion in vector form.
OR
Why there is no end point of magnetic field lines?
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.
Write answer of each question in one sentence: What is the unit of power of lens?
Write answer of each question in one sentence: How Galvanometer is changed in a voltmeter?
Write True or False:
Working of microwave oven is based on Radio wave.
Write answer of each question in one sentence: What is diffraction?
Write answer of each question in one sentence: What is direction of magnetic dipole moment of a magnet?
Write True or False:
The average power supplied to an inductor over one complete cycle is zero.
Write answer of each question in one sentence: What is threshold frequency?
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:
Voltmeter is more superior to potentiometer.
Write True or False:
Atom is a positive particle.
Write True or False:
In an intrinsic semiconductor the number of free electrons is equal to the number of holes.
Write True or False:
De-broglie waves are an electromagnetic wave.
The focal length of eye piece in telescope \(\underline{\hspace{3cm}}\) the focal length of the objective.
The frequency of the light wave is order of \(\underline{\hspace{3cm}}\).