Q. Which phenomenon explains why a straw can draw liquid upwards?
A.Capillary action
B.Surface tension
C.Viscosity
D.Hydrostatic pressure
Solution
Capillary action allows liquids to rise in narrow spaces, such as a straw, due to adhesive and cohesive forces.
Correct Answer: A — Capillary action
Q. Which phenomenon is primarily responsible for the shape of small liquid droplets?
A.Viscosity
B.Surface tension
C.Density
D.Capillarity
Solution
Surface tension causes small droplets to minimize their surface area, resulting in a spherical shape.
Correct Answer: B — Surface tension
Q. Which principle explains why a ship floats on water?
A.Archimedes' principle
B.Bernoulli's principle
C.Pascal's principle
D.Newton's third law
Solution
Archimedes' principle states that a body submerged in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced.
Correct Answer: A — Archimedes' principle
Q. Which process involves a change in temperature due to heat transfer?
A.Isothermal process
B.Adiabatic process
C.Isobaric process
D.Isochoric process
Solution
An isobaric process occurs at constant pressure and can involve a change in temperature due to heat transfer.
Correct Answer: C — Isobaric process
Q. Which process involves a change in temperature without a change in phase?
A.Melting
B.Boiling
C.Heating
D.Condensation
Solution
Heating involves a change in temperature without a change in phase.
Correct Answer: C — Heating
Q. Which quantum number describes the orientation of an orbital?
A.Principal quantum number
B.Azimuthal quantum number
C.Magnetic quantum number
D.Spin quantum number
Solution
The magnetic quantum number describes the orientation of an orbital in space.
Correct Answer: C — Magnetic quantum number
Q. Which theorem is used to find the moment of inertia of a body about an axis that is parallel to an axis through its center of mass?
A.Perpendicular axis theorem
B.Parallel axis theorem
C.Pythagorean theorem
D.Conservation of angular momentum
Solution
The parallel axis theorem is used to find the moment of inertia about an axis parallel to one through the center of mass.
Correct Answer: B — Parallel axis theorem
Q. Which type of damping results in the system returning to equilibrium without oscillating?
A.Underdamping
B.Critical damping
C.Overdamping
D.No damping
Solution
Critical damping allows the system to return to equilibrium in the shortest time without oscillating.
Correct Answer: B — Critical damping
Q. Which type of lens is used to correct hyperopia (farsightedness)?
A.Concave lens
B.Convex lens
C.Bifocal lens
D.Cylindrical lens
Solution
A convex lens is used to converge light rays for hyperopic correction.
Correct Answer: B — Convex lens
Q. Which type of orbit allows a satellite to cover the entire surface of the Earth?
A.Geostationary orbit
B.Polar orbit
C.Elliptical orbit
D.Circular orbit
Solution
A polar orbit allows a satellite to pass over the entire surface of the Earth as the Earth rotates beneath it.
Correct Answer: B — Polar orbit
Q. Which type of orbit allows a satellite to pass over the same point on the Earth's surface at the same local solar time every day?
A.Polar orbit
B.Geostationary orbit
C.Sun-synchronous orbit
D.Elliptical orbit
Solution
A sun-synchronous orbit allows a satellite to pass over the same point on the Earth's surface at the same local solar time every day, as it is synchronized with the Earth's position relative to the Sun.
Correct Answer: C — Sun-synchronous orbit
Q. Which type of radiation consists of helium nuclei?
A.Alpha radiation
B.Beta radiation
C.Gamma radiation
D.X-rays
Solution
Alpha radiation consists of helium nuclei, which are emitted during certain types of radioactive decay.
Correct Answer: A — Alpha radiation
Q. Which type of satellite orbit is best for monitoring weather patterns?
A.Geostationary orbit
B.Polar orbit
C.Elliptical orbit
D.Low Earth orbit
Solution
Geostationary satellites are ideal for monitoring weather patterns as they provide a constant view of the same area.
Correct Answer: A — Geostationary orbit
Q. Which type of satellite orbit is best for weather monitoring?
A.Geostationary orbit
B.Polar orbit
C.Elliptical orbit
D.Low Earth orbit
Solution
Geostationary orbits are ideal for weather monitoring as they provide a constant view of the same area of the Earth.
Correct Answer: A — Geostationary orbit
Q. Why is a potentiometer preferred over a voltmeter for measuring voltage?
A.It is cheaper
B.It provides more accurate measurements
C.It is easier to use
D.It requires less power
Solution
A potentiometer is preferred because it provides more accurate measurements as it does not draw current from the circuit.
Correct Answer: B — It provides more accurate measurements
