Practice free Physics NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
What evidence solidified the particle-like behavior of light, in addition to the photoelectric effect?
The text states, 'The particle-like behaviour of light was further confirmed, in 1924, by the experiment of A.H. Compton (1892-1962) on scattering of X-rays from electrons.'
If one gram of matter is completely converted to energy, the amount of energy released would be:
From Example 13.2, 'Calculate the energy equivalent of 1 g of substance. Solution: Energy, $E = 10^{-3} \times (3 \times 10^8)^2 \text{ J} = 10^{-3} \times 9 \times 10^{16} = 9 \times 10^{13} \text{ J}$'.
In the context of the dual nature of radiation and matter, what does Planck's constant (h) relate?
The text explaining the de Broglie relation (Eq. 11.5) states, 'On the left hand side of Eq. (11.5), $\lambda$ is the attribute of a wave while on the right hand side the momentum p is a typical attribute of a particle. Planck’s constant h relates the two attributes.'
Millikan's experiments on the photoelectric effect, initially aimed at disproving Einstein's photoelectric equation, eventually led to:
The text explicitly states: 'During 1906-1916, Millikan performed a series of experiments on photoelectric effect, aimed at disproving Einstein’s photoelectric equation... In this way, in 1916, Millikan proved the validity of Einstein’s photoelectric equation, instead of disproving it.'
The dualism of matter, inherent in the de Broglie relation, means that it contains:
The text explains: 'The dualism of matter is inherent in the de Broglie relation which contains a wave concept ($\lambda$) and a particle concept (p).'
Which of the following theories unified the laws of conservation of mass and conservation of energy into a single, unified law?
Under 'POINTS TO PONDER' in the NUCLEI chapter, it says: 'After Einstein showed the equivalence of mass and energy, E = mc^2, we cannot any longer speak of separate laws of conservation of mass and conservation of energy, but we have to speak of a unified law of conservation of mass and energy.'
In the phenomenon of seeing an object by our eye, the gathering and focussing mechanism of light by the eye-lens is best described by the:
The text states: 'For example, in the familiar phenomenon of seeing an object by our eye, both descriptions are important. The gathering and focussing mechanism of light by the eye-lens is well described in the wave picture.'
A simple microscope is limited to a maximum magnification of approximately:
According to the NCERT text, 'A simple microscope has a limited maximum magnification (≤ 9) for realistic focal lengths.'
In a compound microscope, the objective lens forms an image that is:
The NCERT states: 'The lens nearest the object, called the objective, forms a real, inverted, magnified image of the object.'
The eyepiece of a compound microscope functions essentially like a:
The NCERT states: 'This serves as the object for the second lens, the eyepiece, which functions essentially like a simple microscope or magnifier, produces the final image, which is enlarged and virtual.'
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.