Question 141
What is the energy of a photon with frequency 6×10¹⁴ Hz? (Planck constant h = 6.6×10⁻³⁴ Js)Modern physicsModern physicshard
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Question 142
Which physical quantity is measured in newton (N)?MechanicsMechanicseasy
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Question 143
In thermodynamics, which law states that energy cannot be created or destroyed, only transformed?HeatHeathard
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Question 144
A ball is thrown vertically upwards with a velocity of 20 m/s. What is the time taken to reach the highest point? (Take g = 10 m/s²)MechanicsMotion in One Dimensioneasy
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Question 145
Which form of energy is primarily involved when a stretched bow releases an arrow?EnergyEnergy and Workmedium
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Question 146
Which of the following best explains why metals generally have high thermal conductivity?HeatThermal Properties of Mattermedium
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Question 147
The frequency of a wave is 50 Hz and its speed is 200 m/s. What is its wavelength?WavesWave Propertieseasy
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Question 148
In an electric circuit, the resistance is doubled while the voltage remains constant. What happens to the current?ElectricityElectric Circuitseasy
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Question 149
Which of the following materials is most likely to be strongly attracted by a magnet?MagnetismMagnetic Effects of Electric Currenteasy
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Question 150
Which phenomenon best demonstrates the particle nature of light?Modern physicsPhotoelectric Effectmedium
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