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SSC CGL 2024 Tier 1 Science MCQ [Physics]
- In the year 1925, who extracted lipids from an erythrocyte sample and found that lipid monolayers are good for measuring molecular surface area versus lateral pressure?
A) Carson and Eccles
B) Avery and Buck
C) Margulis and Ruska
D) Gorter and Grendel - How long will a sound wave take to travel 1.5km, which has a frequency of 5 kHz and wavelength of 6 cm?
A) 2.5 seconds
B) 50 seconds
C) 5 seconds
D) 25 seconds - Which of the following gases emits red light when electricity is passed through it?
A) Neon
B) Hydrogen
C) Argon
D) Helium - An electric iron requires a ________ fuse to prevent short circuiting.
A) 4 A
B) 3 A
C) 2 A
D) 5 A - Who first stated the principle of refraction that postulates that every substance has a specific bending ratio – ‘refractive index’?
A) Dennis Gabor
B) Thomas Young
C) Willebrord Snellius
D) David Brewster - Calorimeter is a small container made of a thin sheet of _________ with good thermal conductivity.
A) silver
B) platinum
C) copper
D) cesium - Identify an example of plasma as a state of matter.
A) Blood
B) Dry ice
C) Freon
D) Neon sign bulbs - In the context of vernier calliper, an internal jaw is used to measure:
A) the length correct up to 1 mm
B) the depth of a beaker
C) the length of a rod and diameter of a sphere
D) the internal diameter of a hollow cylinder and pipes - Who reconciled Dalton’s atomic hypothesis with Gay-Lussac’s results on the combination of volumes in 1811?
A) Robert Boyle
B) Amadeo Avogadro
C) Fred Hoyle
D) Jacques Charles - A small object is placed on the focus on the left side of a convex lens. Where will be the image formed?
A) At the centre on the right side of the lens.
B) At infinity on the left side of the lens.
C) At infinity on the right side of the lens.
D) At the focus on the right side of the lens. - Ernest Rutherford used about ________ thick gold foil for alpha scattering experiments.
A) 500 atoms
B) 1000 atoms
C) 900 atoms
D) 700 atoms - Why does the milkman add a very small amount of baking soda to fresh milk?
A) To reduce the pH of the fresh milk from 6 to slightly more acidic
B) To increase the pH of the fresh milk from 6 to slightly alkaline
C) To maintain the pH of the fresh milk at 6 for a longer time
D) To reduce the pH of the fresh milk from 6 to slightly alkaline - If a bar magnet is hung from a string, in which direction does its north pole point?
A) West
B) North
C) East
D) South - In the Right-Hand Thumb Rule, the thumb is directed towards the direction of:
A) current
B) electric field
C) motion of the conductor
D) magnetic field - Which type of radiation has very short (<10 nm) wavelengths, produced by nuclear explosions, lightning and less dramatic activity of radioactive decay?
A) Gamma
B) Infra-red
C) Microwave
D) Ultraviolet - Name the phenomenon where an opaque object on the path of light becomes very small and where light has a tendency to bend around it and not walk in a straight line.
A) Reflection of light
B) Diffraction of light
C) Angle of refraction
D) Angle of incidence - Which of the following two quantities have the same dimensions?
A) Work and torque
B) Power and moment of inertia
C) Work and angular displacement
D) Power and radius of circular motion - In the context of periodicity, a unit called picometre is used to measure the __________.
A) atomic radius
B) molar mass
C) atomic density
D) spin quantum number - What happens when two forces act in the opposite directions on an object?
A) The net force acting on the object is the difference between the two objects.
B) The net force acting on the object is the difference between the two forces.
C) The net force acting on the object is the total of the two forces.
D) The net force acting on the object is the sum of the two objects. - A dense mass of water drops on smoke or dust particles in the lower atmosphere layers is referred to as:
A) mist
B) blizzard
C) frost
D) smog - Identify the INCORRECT pair regarding motion and their examples?
A) Translatory motion – A ball falling from the cliff
B) Periodic motion – Hands of a clock
C) Oscillatory motion – Earth moving around the sun
D) Rotatory motion – blades of a fan - What was the name of the wind measuring instrument invented for the first time in 1450?
A) Transmissometer
B) Dropsonde
C) Anemometer
D) Ceiling Projector - A javelin thrown by an athlete is in ________ motion.
A) oscillatory
B) periodic
C) rectilinear
D) curvilinear - Which of the following is NOT a unit of energy?
A) Joule
B) Calorie
C) Newton
D) Kilowatt hour - Which of the following statements is NOT correct?
A) Light year is the unit of distance.
B) Light year is the distance travelled by light in one year.
C) Light year is the unit of time.
D) Angstrom is unit of length. - What is the unit of specific resistance?
A) Farad
B) Ampere
C) Coulomb
D) Ohm meter - Which famous experiment was done by Michael Faraday in 1831?
A) Discovery of quantum magnetometers
B) Discovery of law of elasticity
C) Discovery of electromagnetic induction
D) Discovery of natural radioactivity - What is the unit of measurement for optical power of the lens?
A) Yotta
B) Katal
C) Radian
D) Diopter - What is the SI unit of current?
A) Ohm
B) Ampere
C) Metre
D) VoltTop of FormBottom of Form
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