Correct Answer: C) Speed
Explanation: The speed of sound is affected by the temperature of the medium through which it travels. Higher temperatures typically increase the speed of sound in air.
A) Thermodynamics
B) Quantum Mechanics
C) Classical Mechanics
D) Electrodynamics
Correct Answer: B) Quantum Mechanics
Explanation: Quantum mechanics is the branch of physics that explains the behavior of particles at very small scales, including the behavior of atoms at very low temperatures.
A) Pitch
B) Loudness
C) Speed
D) Timbre
Correct Answer: C) Speed
Explanation: The speed of sound is affected by the temperature of the medium through which it travels. Higher temperatures typically increase the speed of sound in air.
A) Electric Motor
B) Refrigerator
C) Rocket
D) Battery
Correct Answer: C) Rocket
Explanation: Rockets operate on the principle of conservation of momentum. The momentum of the ejected exhaust gas from a rocket in one direction gives an equal and opposite momentum to the rocket itself.
A) Wind
B) Sun
C) Moon
D) Centrifugal force
Correct Answer: C) Moon
Explanation: The primary cause of tides in Earth’s oceans is the gravitational pull of the moon, which pulls the water towards it, creating tidal forces.
A) Resistor
B) Capacitor
C) Inductor
D) Transformer
Correct Answer: B) Capacitor
Explanation: A capacitor blocks direct current (DC) but allows alternating current (AC) to pass through it, making it an essential component in various electronic circuits.
A) Thomas Edison
B) Nikola Tesla
C) Michael Faraday
D) James Watt
Correct Answer: C) Michael Faraday
Explanation: Michael Faraday is credited with the invention of the dynamo, which is a device that converts mechanical energy into electrical energy.
A) Anemometer
B) Barometer
C) Hygrometer
D) Thermometer
Correct Answer: B) Barometer
Explanation: A barometer is used to measure atmospheric pressure. It is a crucial tool in meteorology for weather prediction.
A) Polarization
B) Refraction
C) Diffraction
D) Interference
Correct Answer: D) Interference
Explanation: Interference is a phenomenon in which two waves superpose to form a resultant wave of greater, lower, or the same amplitude.
A) Reflection
B) Refraction
C) Diffraction
D) Dispersion
Correct Answer: B) Refraction
Explanation: Refraction is the change in direction of a wave passing from one medium to another caused by its change in speed.
A) Reflection
B) Refraction
C) Absorption
D) Scattering
Correct Answer: B) Refraction
Explanation: Refraction occurs when light waves change direction due to passing through different mediums at an angle, altering their speed.
A) Reflection
B) Refraction
C) Diffraction
D) Dispersion
Correct Answer: C) Diffraction
Explanation: Diffraction refers to the bending of light waves around obstacles and the spreading out of waves past small openings.
A) Charles’s Law
B) Gay-Lussac’s Law
C) Boyle’s Law
D) Avogadro’s Law
Correct Answer: D) Avogadro’s Law
Explanation: Avogadro’s Law states that equal volumes of all gases, at the same temperature and pressure, contain the same number of molecules.
A) Generator
B) Motor
C) Battery
D) Transformer
Correct Answer: B) Motor
Explanation: An electric motor converts electrical energy into mechanical energy, typically by electromagnetic interactions.
A) Candela
B) Lux
C) Lumen
D) Watt
Correct Answer: A) Candela
Explanation: The candela is the SI unit of luminous intensity; it measures the perceived power emitted by a light source in a particular direction.
A) Albert Einstein
B) Charles-Augustin de Coulomb
C) Benjamin Franklin
D) Alessandro Volta
Correct Answer: C) Benjamin Franklin
Explanation: Benjamin Franklin introduced the concept of contact electrification, which involves the transfer of electric charge between two materials when they are brought into contact and then separated.
A) Velocity
B) Acceleration
C) Energy
D) Force
Correct Answer: C) Energy
Explanation: Energy is a scalar quantity because it does not have a direction associated with it, unlike vector quantities such as velocity, acceleration, and force.
A) Photoelectric effect
B) Compton scattering
C) Cathode ray emission
D) Thermionic emission
Correct Answer: D) Thermionic emission
Explanation: Thermionic emission is the release of electrons from a heated metal surface, an effect used in vacuum tubes and cathode ray tubes.
A) Bernoulli’s principle
B) Archimedes’ principle
C) Doppler radar
D) Radar gun
Correct Answer: C) Doppler radar
Explanation: Doppler radar utilizes the Doppler effect to measure the speed of an object by analyzing the change in frequency of the returned radar signal.
A) Ohm’s Law
B) Faraday’s Law of emi
C) Lenz’s Law
D) Kirchhoff’s Voltage Law
Correct Answer: B) Faraday’s Law of emi
Explanation: Faraday’s Law of Electromagnetic Induction states that the induced electromotive force in any closed circuit is equal to the rate of change of the magnetic flux through the circuit, a fundamental principle in electromagnetism.
A) Heat
B) Temperature
C) Energy
D) Entropy
Correct Answer: A) Heat
Explanation: Heat is the transfer of thermal energy from one system to another and is a measure of the total kinetic energy of particles in a substance.
& stay ahead of your competitors!
* Subscribe to our email newsletter to get the latest posts delivered right to your email.