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Physics

Physics
In MRI machine, which one of the following is used?

Magnetic wave
Sound wave
X-ray
Ultra-sound wave

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Physics
The mercury and sodium street lamps light up because of :

Atomic emission
Electron absorption
Atomic absorption
Electron emission

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Physics
Which of the following experiments analyzed the Fraunhofer lines of the solar spectrum?

Bunsen and Kirchhoff's experiment
Lamb-Rutherford experiment
Geiger and Marsdens experiment on scattering of alpha particles
Barkla's experiment on scattering of X-rays

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Physics
Steam at 100°C causes more severe burns than water at 100°C because

Water has no specific heat capacity
Steam has latent heat of vaporisation
Water has latent heat of fusion
Steam has no specific heat capacity

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Physics
The minimum number of forces to keep a particle in equilibrium is

2
1
3
4

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Physics
When a ball is thrown vertically upwards, which of the following quantities remains constant during its motion?

Acceleration
Velocity
Displacement
Energy

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