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Current Affairs January 2024

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4

Which type of mirror can form both real and virtual images?

A. Concave mirror

B. Convex mirror

C. Plane mirror

D. Spherical mirror

Correct Answer :

A. Concave mirror


Related Questions

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4

Which law states that the pressure of a gas is directly proportional to its absolute temperature at constant volume?

A. Boyle's Law

B. Charles's Law

C. Gay-Lussac's Law

D. Avogadro's Law

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4

Which law states that an object at rest tends to stay at rest and an object in motion tends to stay in motion unless acted upon by an external force?

A. Newton's First Law of Motion

B. Newton's Second Law of Motion

C. Newton's Third Law of Motion

D. Law of Gravitation

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4

Which of the following statements about nuclear reactors is true?

A. They use nuclear fusion to generate electricity.

B. They control nuclear fission reactions to produce heat.

C. They primarily use coal as a fuel source.

D. They do not involve the release of radiation.

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4

What is the SI unit of frequency in the CGS system?

A. Hertz

B. Rad/s

C. Cycles per second

D. Revolutions per minute

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4

What is the process by which a solid changes directly into a gas without passing through the liquid phase?

A. Evaporation

B. Sublimation

C. Condensation

D. Melting

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What is the phenomenon where a wave changes direction as it passes through a medium with a different density?

A. Reflection

B. Diffraction

C. Refraction

D. Interference

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4

What is the formula for calculating electric power in a circuit?

A. P = VI

B. P = V²/R

C. P = I²R

D. P = V/R

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4

Which type of electromagnetic wave has the highest frequency?

A. Gamma rays

B. Radio waves

C. X-rays

D. Microwaves

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4

What is the SI unit of electric potential energy?

A. Volt

B. Joule

C. Watt

D. Ohm

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4

What is the process by which a material becomes magnetized when placed in a magnetic field?

A. Induction

B. Magnetization

C. Polarization

D. Ferromagnetism

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4

Which of the following statements about circular motion is true?

A. The centripetal force acts outward from the center of the circle.

B. Angular velocity is constant in circular motion.

C. The velocity of an object in circular motion is constant.

D. Acceleration is directed towards the center of the circle.

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4

What is the phenomenon where a wave bounces back after striking a surface?

A. Refraction

B. Diffraction

C. Interference

D. Reflection

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4

What is the SI unit of force?

A. Watt

B. Joule

C. Newton

D. Volt

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What is the phenomenon where a wave undergoes a change in direction due to a change in medium?

A. Reflection

B. Diffraction

C. Refraction

D. Interference

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4

Which of the following is a fundamental particle found in the nucleus of an atom?

A. Neutron

B. Electron

C. Proton

D. Photon

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4

What is the SI unit of magnetic susceptibility?

A. No unit (dimensionless)

B. Tesla per meter

C. Ampere per meter

D. Weber

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4

Which type of energy is associated with the motion of atoms and molecules?

A. Kinetic energy

B. Potential energy

C. Thermal energy

D. Mechanical energy

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4

What is the phenomenon where light is separated into its component colors due to refraction and reflection within a material?

A. Dispersion

B. Polarization

C. Diffraction

D. Interference

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4

What is the phenomenon where light waves oscillate in a single plane?

A. Polarization

B. Diffraction

C. Interference

D. Dispersion

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4

What is the SI unit of magnetic flux?

A. Weber

B. Tesla

C. Henry

D. Gauss

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4

What is the SI unit of magnetic pole strength?

A. Ampere-meter

B. Weber

C. Tesla

D. Ampere

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What is the SI unit of magnetic field strength in the CGS system?

A. Oersted

B. Tesla per meter

C. Ampere per meter

D. Weber

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4

What is the SI unit of energy in the CGS system?

A. Erg

B. Joule

C. Newton-meter

D. Watt-hour

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4

Which of the following is an example of a vector quantity?

A. Mass

B. Speed

C. Distance

D. Velocity

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4

Which type of lens is thicker in the center and thinner at the edges?

A. Convex lens

B. Concave lens

C. Plano-convex lens

D. Plano-concave lens

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4

What is the SI unit of heat energy?

A. Calorie

B. Joule

C. Newton-meter

D. Watt

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4

What is the process by which a gas changes into a solid without passing through the liquid phase?

A. Vaporization

B. Deposition

C. Sublimation

D. Condensation

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4

What is the unit of electric charge?

A. Coulomb

B. Volt

C. Ampere

D. Farad

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4

Which of the following is a measure of an object's resistance to changes in its linear motion?

A. Inertia

B. Momentum

C. Impulse

D. Damping coefficient

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4

Which type of lens is thinner in the center and thicker at the edges?

A. Convex lens

B. Concave lens

C. Plano-convex lens

D. Plano-concave lens