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SPSC – Sindh Public Service Commission 2021 Past Paper with Answers

Practice the SPSC – Sindh Public Service Commission 2021 past paper with 423 solved MCQs, answers and topic coverage.

423 solved MCQs across 8 approved papers

SPSC - ASI Past Paper 2021 (Morning)SPSC - ASI · 2021 SPSC - Combined Competitive Examination Past Paper 08-08-2021SPSC - Combined Competitive Examination · 2021 SPSC - Lecturer Botany Past Paper 2021 (Evening)SPSC - Lecturer Botany · 2021 SPSC - Lecturer Botany Past Paper 2021 (Morning)SPSC - Lecturer Botany · 2021 SPSC - Lecturer Chemistry Past Paper 2021 (Evening)SPSC - Lecturer Chemistry · 2021 SPSC - Lecturer Chemistry Past Paper 2021 (Morning)SPSC - Lecturer Chemistry · 2021 SPSC - Lecturer Physics Past Paper 2021 (Evening)SPSC - Lecturer Physics · 2021 SPSC - Lecturer Physics Past Paper 2021 (Morning)SPSC - Lecturer Physics · 2021
A particle A has a charge +q and particle B has a charge +4q with each of them having the same mass m. When allowed to fall from rest through the same electrical potential difference, the ratio of their speed VA : VB will become _____?Answer: 1:2 What does not change when sound enters from one medium to another?Answer: Frequency What is the degree of freedom in the case of a monoatomic gas?Answer: 3 Escape velocity on Earth is 11.2 km/s. What would be the escape velocity on a planet whose mass is 1000 times and radius is 10 times that of Earth?Answer: 112 km/s A satellite is revolving around the Earth. If its height is 4 times the height of a geo-stationary satellite, what will become its time period?Answer: 8 days Kepler’s laws state that the square of the time period of any body about the sun is directly proportional to _______?Answer: R³ When a proton and anti-proton annihilate, the energy release is ______?Answer: 3x10⁻¹⁰ J If momentum decreases by 20% kinetic energy will decrease _____?Answer: 36% If momentum decreases by 20% kinetic energy will decrease _____?Answer: 36% The ratio of the weight of a man in a stationary lift and in a lift accelerating downward with uniform acceleration ‘a’ is 3:2. The acceleration of the lift is _____?Answer: g/3 A body is projected with the same velocity at angle 35°, 70°, 60°, 20° from the horizontal. The maximum ratio will be at _____?Answer: 35° One projectile moving with velocity V in space gets burst into 2 parts of masses in the ratio 1:3. The smaller part becomes stationary. What is the velocity of the other part?Answer: 4V/3 A man can throw a ball to a maximum height of h. He can throw the same ball to the maximum horizontal distance of _____?Answer: 2h A resistor of 4kΩ with tolerance 10% is connected in parallel with a resistor of 6 kΩ with tolerance 10%. The tolerance of the parallel combination is nearly ______?Answer: 10% The range of the coulomb's force is _____?Answer: Infinite If the distance between the charges doubles, the coulomb's force between the charges _____?Answer: One-fourth Average distance covered by alpha particle (α-particle) in air before its ionizing power ceases is called its?Answer: Range An isotope is _____?Answer: An atom with a specified number of protons and neutrons Which one of the following is more coherent?Answer: Laser A student added three figures 72.1, 3.32 and 0.003. The correct answer regrading the rules of the addition of the significant figures will be ______?Answer: 75.4 Which of the following does not apply in nanotechnology?Answer: Newtonian mechanics can describe it The full form of STM is _____?Answer: Scanning Tunneling Microscope The structure of Na⁺Cl⁻ is _____?Answer: Face-centered cubic (FCC) Refractive index of materials is approximately equal to the square root of _____?Answer: Electrical permittivity × Magnetic permeability Phase difference between a node and an antinode is _____?Answer: 90° A sphere, a cube and a thin circular plate, all made of the same material and having the same mass are initially heated to a temperature of 3000°K, which of these will cool fastest?Answer: Plate The dependence of the mobility of charge carriers in a semiconductor is given by _____?Answer: μ ∝ 1/T¹/² Ferromagnetic materials are obtained from _____?Answer: Nickel Data are stored in a random access memory (RAM) during the _____?Answer: Write operation The atomic diameter of a BCC crystal (if a is lattice parameter) is _____?Answer: a/(4/√3)