Physics NEET Daily MCQs Practice Questions | 2 August, 2024

A helium nucleus ₂He⁴ can be produced by fusing two deuterium nuclei. If the nuclear masses of deuterium and helium nuclei are 2.0149 a.m.u. and 4.0027 a.m.u. respectively, then the energy liberated in this process is :-

${}_{100}\mathrm{X}^{244}\stackrel{\mathrm{\alpha }}{\to }\stackrel{\mathrm{\alpha }}{\to }\stackrel{2{\mathrm{\beta }}^{-}}{\to }\stackrel{\mathrm{\alpha }}{\to }{}_{\mathrm{Q}}\mathrm{Y}^{\mathrm{P}}$  P & Q will be:

How long after the beginning of motion is the displacement of a harmonically oscillating particle equal to one half its amplitude, if the time period is 24s and particle starts from rest.

A capillary tube (A) is dipped in water. Another identical tube (B) is dipped in a soap-water solution. Which of the following shows the relative height of the liquid columns in the two tubes ?

In astronomical telescope final image is:-

Three semiconductors are arranged in the increasing order of their energy gap as follows. The correct arrangement is :-

A diode having potential difference 0.5 V across its junction which does not depend on current, is connected in series with resistance of 20 Ω across source. If 0.1 A passes through resistance then what is the voltage of the source :-

In an experiment with a beam balance an unknown mass m is balanced as shown in fig. The value of the unknown mass m is :-

A large flask contains air at 27°C. In order to expel out half the mass of air from the flask, the flask should be heated upto what temperature ?

Find correct relation between P_A and P_B for given figure :

One kg of a diatomic gas is at a pressure of 8 × 10⁴ N/m² . The density of the gas is 4 kg/m³. What is the energy of the gas due to its thermal motion?

Dimensional formula of Planck constant is :-

The result after adding 3.8 × 10^-6 with 4.2 × 10^-5 with due regard to significant figures is:-

A tunning fork of frequency 400 Hz produces 4 beats/sec with a stretched wire. If on increasing tension in the string, the number of beats remains unchanged. The frequency of the wire is :-

The reflected ray is completely polarized when a ray is incident at a medium of refractive index 1.73, then the value of angle of refraction ?