6,671 previous year Himachal Pradesh Board (HPBOSE) - Class 9 questions, grouped by year, with answers and solutions.
Directions: In the question below, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option:
Assertion (A): Danger signals on communication towers and traffic posts are always illuminated in red color.
Reason (R): Red light has the longest wavelength in the visible spectrum and suffers minimum Rayleigh scattering ($I \propto 1/\lambda^4$) through fog and smoke.
Directions: In the question below, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option:
Assertion (A): Under the Constitution of India, the judiciary enjoys structural independence from executive and legislative interference.
Reason (R): Judges of the Supreme Court and High Courts have security of tenure and their judicial salaries are charged directly to the Consolidated Fund of India.
Directions: In the question below, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option:
Assertion (A): Work done by an electrostatic field in moving a test charge along a closed path is zero.
Reason (R): The electrostatic Coulomb force is a conservative force whose line integral around any closed loop vanishes identically.
HPBOSE Class 10 English (First Flight): What is the moral of 'चित्र वर्णन एवं पत्र लेखन'?
Directions: In the question below, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option:
Assertion (A): Heavy water ($D_2O$) is utilized as a moderator in thermal nuclear power reactors.
Reason (R): Deuterium nuclei slow down energetic fission neutrons through elastic collisions without substantial parasitic neutron absorption.
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