Question 51
Which law explains the magnetic effect of electric current?MagnetismMagnetismmedium
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Question 52
A block slides down a frictionless inclined plane of height 5 m. What is its speed at the bottom? (Take g=10 m/s²)MechanicsMechanicsmedium
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Question 53
Which of the following best explains why metals conduct electricity?ElectricityElectricityeasy
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Question 54
In photoelectric effect, what happens when the frequency of incident light is below the threshold frequency?Modern physicsModern physicshard
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Question 55
A sound wave has a frequency of 500 Hz and travels at 340 m/s. What is its wavelength?WavesWavesmedium
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Question 56
What is the acceleration of a body moving with uniform velocity?MechanicsMechanicseasy
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Question 57
Which of the following best describes kinetic energy?EnergyEnergymedium
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Question 58
If the resistance of a wire is doubled while the potential difference remains constant, what happens to the current?ElectricityElectricitymedium
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Question 59
What is the principle behind the operation of a transformer?Modern physicsModern physicshard
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Question 60
Which law states that the force between two magnetic poles is directly proportional to the product of their pole strengths and inversely proportional to the square of the distance between them?MagnetismMagnetismhard
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