EASY
12th Haryana Board
IMPORTANT
Earn 100

Draw energy band diagram of p-type semiconductor.

Important Questions on Solved Physics Paper-2

MEDIUM
12th Haryana Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 16 - Atoms>Exercise>Q 2
Using the Rydberg formula, calculate the wavelength of the first four spectral lines in the Balmer series of the hydrogen spectrum.
HARD
12th Haryana Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 16 - Solved Physics Paper-2>Exercise>Q 27

A 100 W sodium lamp radiates energy uniformly in all directions. The lamp is located at the centre of a large sphere that absorbs all the sodium light which is incident on it. The wavelength of the sodium light is 589 nm. (a) What is the energy per photon associated with the sodium light? (b) At what rate are the photons delivered to the sphere? c = 3×108 m/s

MEDIUM
12th Haryana Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 16 - Solved Physics Paper-2>Exercise>Q 28
Write the working principle of an optical fibre.
HARD
12th Haryana Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 16 - Solved Physics Paper-2>Exercise>Q 29
An LCR-series circuit with L=100mH,C=100μF,R=120Ω is connected to an a.c. source of emf ε=30sin⁡100t volt. Find the impedance, peak current and resonant frequency of the circuit.
HARD
12th Haryana Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 16 - Solved Physics Paper-2>Exercise>Q 30
Four resistance 4 ,4 , 4 and12Ω form a Wheatstone's network. Find the resistance which when connected across the 12Ω resistance, will balance the network.
HARD
12th Haryana Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 16 - Solved Physics Paper-2>Exercise>Q 31
Show that electric potential at a point P, at a distance r from a fixed point charge Q is given by V=14πε0 Qr
HARD
12th Haryana Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 16 - Solved Physics Paper-2>Exercise>Q 32
Focal power of the eye lens of a compound microscope is 6 dioptre. The microscope is to be used for maximum magnifying power (angular magnification) of at least 12.5. The packing instructions demand that length of the microscope should be 25 cm. Determine minimum focal power of the objective. How much will its radius of curvature be if it is a biconvex lens of n=1.5.
HARD
12th Haryana Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 16 - Solved Physics Paper-2>Exercise-Choice>Q 33
Discus about astronomical telescope.