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Current Affairs January 2024

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What is the process by which a material becomes electrically charged when brought in contact with a charged object?

A. Conduction

B. Induction

C. Charging by friction

D. Polarization

Correct Answer :

A. Conduction


Related Questions

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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

What is the SI unit of pressure?

A. Pascal

B. Newton

C. Joule

D. Watt

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4

What is the SI unit of intensity of sound?

A. Watt per square meter

B. Decibel

C. Hertz

D. Pascal

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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

What is the unit of electric current in the CGS system?

A. Ampere

B. Coulomb

C. Statampere

D. Ohm

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What is the SI unit of magnetic flux in the CGS system?

A. Weber

B. Gauss

C. Tesla

D. Henry

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Which law states that the total energy in an isolated system remains constant?

A. Law of Conservation of Energy

B. Law of Conservation of Momentum

C. Law of Conservation of Mass

D. Law of Universal Gravitation

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4

What is the phenomenon where a wave superposes with another wave, resulting in a new wave pattern?

A. Reflection

B. Diffraction

C. Refraction

D. Interference

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4

What is the SI unit of electric charge in the MKS system?

A. Coulomb

B. Statcoulomb

C. Ampere

D. Franklin

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4

Which of the following statements about transformers is true?

A. They only work with direct current (DC).

B. They can increase or decrease voltage in an electrical circuit.

C. They do not involve the principle of electromagnetic induction.

D. They are used to store electrical energy.

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4

Which law states that the electromotive force (emf) in a closed circuit is equal to the rate of change of magnetic flux through the circuit?

A. Faraday's Law of Electromagnetic Induction

B. Lenz's Law

C. Ohm's Law

D. Ampere's Law

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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 phenomenon where light waves oscillate in a single plane?

A. Polarization

B. Diffraction

C. Interference

D. Dispersion

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4

Which of the following is a fundamental force of nature responsible for holding atomic nuclei together?

A. Electromagnetic force

B. Gravitational force

C. Weak nuclear force

D. Strong nuclear force

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4

What is the SI unit of energy?

A. Joule

B. Watt

C. Newton

D. Volt

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4

What is the process by which a gas changes into a liquid?

A. Vaporization

B. Condensation

C. Sublimation

D. Fusion

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4

What is the SI unit of electric potential difference?

A. Volt

B. Ampere

C. Ohm

D. Watt

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4

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

Which of the following statements about wave speed is true?

A. It is determined by frequency and wavelength.

B. It is independent of the medium through which the wave travels.

C. It is inversely proportional to amplitude.

D. It is a scalar quantity.

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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 SI unit of magnetic pole strength?

A. Ampere-meter

B. Weber

C. Tesla

D. Ampere

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4

Which of the following is an example of a simple machine?

A. Lever

B. Inclined plane

C. Pulley

D. All of the above

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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

What is the SI unit of momentum?

A. Kilogram-meter per second

B. Newton-meter

C. Joule

D. Watt

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4

What is the SI unit of force?

A. Watt

B. Joule

C. Newton

D. Volt

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4

Which law states that the total entropy of an isolated system can never decrease over time?

A. First Law of Thermodynamics

B. Second Law of Thermodynamics

C. Third Law of Thermodynamics

D. Law of Conservation of Mass

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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

Which of the following is a non-contact force?

A. Friction

B. Tension

C. Gravity

D. Magnetic force

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4

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

A. Boyle's Law

B. Charles's Law

C. Gay-Lussac's Law

D. Avogadro's Law

What is the correct answer?

4

Which law states that the total momentum of an isolated system remains constant if no external forces act on it?

A. Newton's First Law of Motion

B. Newton's Second Law of Motion

C. Newton's Third Law of Motion

D. Law of Conservation of Momentum