HorthooZ – Kerala GK, PSC Questions & Onam Quiz

Q1 Multiple Choice Question

What was the name of the very first artificial satellite launched into space by humanity in October 1957?

A Aryabhata B Sputnik 1 (launched by Soviet Union) C Explorer 1 D Vostok 1

Q2 Multiple Choice Question

What does the Chandrasekhar Limit (~1.4 times the mass of the Sun) signify in astrophysics and stellar evolution?

A The exact mass of a black hole event horizon B The minimum mass required for a planet to sustain liquid water oceans C The threshold temperature for hydrogen fusion in stellar cores D The maximum mass of a stable white dwarf star before electron degeneracy pressure fails and it collapses into a neutron star or black hole.

Q3 Multiple Choice Question

Which physicist provided the theoretical explanation of the Photoelectric Effect using light quanta (photons), earning the 1921 Nobel Prize?

A Max Planck B Niels Bohr C Erwin Schrödinger D Albert Einstein

Q4 Multiple Choice Question

What physical pressure counteracts gravitational collapse in a stable white dwarf star?

A Electrostatic repulsion between atomic nuclei B Electron degeneracy pressure (arising from the Pauli exclusion principle) C Centrifugal pressure due to rapid axial rotation D Thermal gas pressure from nuclear hydrogen fusion

Q5 Multiple Choice Question

What was the name of India's first artificial satellite, launched into space on April 19, 1975?

A Rohini B Aryabhata C Chandrayaan-1 D Bhaskara

Q6 Multiple Choice Question

What is the primary function of moderators (such as heavy water or graphite) in a nuclear fission reactor?

A To cool down turbine generators directly with steam B To absorb all neutrons completely and stop the reactor instantly C To generate electrical voltage without dynamo rotation D To slow down fast-moving fission neutrons to thermal speeds for sustaining chain reaction

Q7 Multiple Choice Question

What is the boundary surrounding a black hole beyond which nothing, not even light, can escape called?

A Photon accretion disk B Schwarzschild radius limit C Event Horizon D Singularity boundary

Q8 Multiple Choice Question

Which radioactive emission carries no mass or electrical charge and possesses the highest penetration power?

A Cathode rays B Alpha particles C Gamma rays (electromagnetic photons) D Beta particles (fast electrons)

Q9 Multiple Choice Question

What is the primary role of ISRO's PSLV (Polar Satellite Launch Vehicle), often hailed as the 'workhorse' of the Indian space programme?

A Carrying human astronauts into permanent Mars colonies B Launching heavy communication satellites directly into geostationary transfer orbits C Testing supersonic intercontinental ballistic missiles D Launching remote sensing and Earth observation satellites into polar sun-synchronous orbits

Q10 Multiple Choice Question

What is 'mass defect' in nuclear physics, and how is it related to nuclear binding energy via Einstein's equation?

A The conversion of photons into kinetic energy B The gravitational mass loss in black hole accretion C The difference between total mass of individual nucleons and actual nucleus mass, converted into binding energy ($E = \Delta m c^2$) D The loss of electron mass during beta decay

Q11 Multiple Choice Question

What fundamental limit is imposed by Heisenberg's Uncertainty Principle on the simultaneous measurement of position ($x$) and momentum ($p$) of a particle?

A \Delta x \cdot \Delta p \ge h^2 B \Delta x + \Delta p \le \frac{h}{2\pi} C \Delta x \cdot \Delta p = 0 D \Delta x \cdot \Delta p \ge \frac{\hbar}{2}

Q12 Multiple Choice Question

What physical phenomenon discovered by Sir C.V. Raman in 1928 earned him the Nobel Prize in Physics in 1930?

A Diffraction of X-rays through crystal lattices B Photoelectric emission of electrons from metal plates C Total internal reflection in glass prisms D Inelastic scattering of light by molecules (Raman Effect)

Q13 Multiple Choice Question

What major scientific discovery on the Moon was facilitated by India's maiden lunar mission, Chandrayaan-1, in 2008?

A Measurement of lunar atmospheric oxygen pressure B Detection of artificial metallic satellite debris C Detection of water molecules ($H_2O$ and $OH$) on the lunar surface D Discovery of active volcanic magma chambers

Q14 Multiple Choice Question

What are the standard units used to measure the activity of a radioactive substance (disintegrations per second)?

A Tesla and Gauss B Becquerel (Bq) and Curie (Ci) C Dioptre and Watt D Weber and Henry

Q15 Multiple Choice Question

What nuclear reaction is the fundamental source of radiant energy and heat in the Sun and other stars?

A Chemical combustion of oxygen B Gravitational contraction only C Nuclear Fusion (combining hydrogen nuclei into helium) D Nuclear Fission

Q16 Multiple Choice Question

What is the principal mission objective of ISRO's upcoming 'Gaganyaan' programme?

A To launch commercial tourism flights to Mars B To build a permanent manned base on the Moon C To send Indian astronauts (Vyomonauts) into low Earth orbit and safely return them D To dock with the International Space Station permanently

Q17 Multiple Choice Question

How is Hubble's Law mathematically expressed to relate galaxy recession velocity ($v$) and proper distance ($d$), where $H_0$ is the Hubble constant?

A v = H_0 \cdot d^2 B v = \frac{d}{H_0} C v = H_0 d D v = \frac{H_0}{d^2}

Q18 Multiple Choice Question

What major atomic discovery was made by Ernest Rutherford through his famous gold foil alpha-particle scattering experiment in 1911?

A Discovery of nuclear fission chain reactions B Discovery of the dense, positively charged atomic nucleus C Discovery of cosmic background radiation D Discovery of free electrons orbiting in shells

Q19 Multiple Choice Question

What historic feat did India achieve on August 23, 2023, with the successful landing of the Chandrayaan-3 mission?

A India discovered liquid water oceans on the lunar surface B India became the first nation in the world to land a spacecraft near the lunar south pole C India became the first nation to land humans on the Moon D India established a permanent nuclear base on the Moon

Q20 Multiple Choice Question

Which subatomic particle was discovered by J.J. Thomson in 1897 using cathode ray tube experiments, and what is its charge?

A Positron B Electron (negative charge) C Proton (positive charge) D Neutron (neutral)

Modern Physics, Universe & Basic Electronics