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Current Affairs January 2024

What is the correct answer?

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

Correct Answer :

C. P = I²R


Related Questions

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4

What is the process of a solid changing directly into a gas called?

A. Evaporation

B. Sublimation

C. Condensation

D. Melting

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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

What is the correct answer?

4

Which of the following statements about kinetic friction is true?

A. It always opposes motion.

B. It is independent of the normal force.

C. It is greater than static friction.

D. It depends on the velocity of the object.

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4

What is the process by which a material acquires a positive or negative charge by gaining or losing electrons?

A. Conduction

B. Induction

C. Charging by friction

D. Polarization

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4

What is the process by which an unstable atomic nucleus loses energy by emitting radiation called?

A. Radioactive decay

B. Nuclear fission

C. Nuclear fusion

D. Electron capture

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4

Which law states that the force between two charges is inversely proportional to the square of the distance between them?

A. Coulomb's Law

B. Ohm's Law

C. Gauss's Law

D. Ampere's Law

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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

Which law states that for every action, there is an equal and opposite reaction?

A. Newton's First Law of Motion

B. Newton's Second Law of Motion

C. Newton's Third Law of Motion

D. Law of Universal Gravitation

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4

What is the SI unit of capacitance?

A. Farad

B. Ohm

C. Henry

D. Volt

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4

Which of the following is a measure of a material's ability to conduct an electric current?

A. Conductance

B. Impedance

C. Susceptance

D. Inductance

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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 flux density?

A. Tesla

B. Weber

C. Henry

D. Gauss

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4

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 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 a wave is partially deflected and partially absorbed by a surface?

A. Reflection

B. Diffraction

C. Refraction

D. Absorption

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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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4

What is the phenomenon where light changes direction when passing from one medium to another?

A. Reflection

B. Diffraction

C. Refraction

D. Polarization

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4

What is the SI unit of resistance in an electrical circuit?

A. Ohm

B. Volt

C. Ampere

D. Watt

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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 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

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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 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 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

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

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

A. Weber

B. Gauss

C. Tesla

D. Henry

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4

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

A. Statcoulomb

B. Coulomb

C. Ampere-hour

D. Franklin

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

A. Ampere

B. Coulomb

C. Statampere

D. Ohm

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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 frequency?

A. Hertz

B. Newton

C. Pascal

D. Watt

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4

Which type of particle is negatively charged and orbits the nucleus of an atom?

A. Electron

B. Proton

C. Neutron

D. Positron