Figure/ Graph Type Question on Rotational Dynamics 🔥⚡|| NEB-Physics ||12 || Important Question ||

Описание: In text Question:-
Three particles, each of 10g are located at the corners of an equilateral triangle of side 5cm. Determine the moment of inertia of this system about an axis passing through one corner of the triangle and perpendicular to the plane of the triangle
Important Questions for 2082 Batch
Modern Physics:
Describe with necessary theory, Millikan's oil drop experiment to determine
the value of the charge associated with an electron.
68. Show that the motion of an electron in magnetic field is circular. Prove that frequency and time period are independent with the velocity of an electron.
69. What is specific charge of an electron? Describe and give necessary theory of J.J. Thomson's method to determine the specific charge of an electron.
70. What is photoelectric effect? Derive Einstein’s photoelectric equation; define various terms used in it.
71. Describe Millikan's experiments to verify Einstein's photoelectric equation
and hence determine the value of Plank’s constant.
72. What is an extrinsic semiconductor? Explain the formation of potential
barrier and depletion region in a p-n junction diode.
73. Explain with neat diagram, the working mechanism of a full wave rectifier
using junction diodes. How the output changes when a filter circuit is used?
74. What if junction diode? Explain its working as half wave rectifier.
75. What is Zener breakdown? Describe how a Zener diode can be used as a voltage regulator?
76. What are Bohr's postulates of hydrogen atom? Derive an expression for the radius of Bohr's nth orbit.
77. Starting from Bohr's postulates, obtain an expression for the energy of the electron in nth orbit of the hydrogen atom.
78. Describe the modern method of productions of X-rays. Discuss crystal
diffraction.
79. Derive Bragg's law and explain how this law is used to determine the crystal plane spacing.
80. State laws of radioactive disintegration and show that the number of atoms of a given radioactive substance decreases exponentially with time. Also, derive a relation between decay constant and half-life of a radioactive
substance.
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