The functioning of a quartz crystal in a watch is based on which principle?
A light ray enters a glass slab from air at 60° incidence. If refractive index of glass is √3, what is angle of refraction?
Which of the following is the energy quantum of radiation?
An object is projected vertically upward from Earth's surface with speedÂ
v 0 = √(GM/1.5R). The maximum height reached from the center of E...
The balance point in a potentiometer for a cell of emf 1.5 V is 60 cm. If a resistance of 5 Ω is connected in parallel with the cell and the new balanc...
Which of the following does not affect the value of acceleration due to gravity?
Which of the following phenomena cannot be explained by the wave theory of light?
'Shock-absorbers are usually made of steel as it –
The energy that can harness heat stored below the earth's surface is known as –
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