GATE PH topic:physics PYQs & Answers — Page 10

Questions 91–100 of 650. Imported answers require independent review unless marked reviewed.

A schematic Pressure-Temperature diagram of water is shown in the figure. Which of the following option(s) is/are correct?

Your answerSelect all correct options. You can choose more than one.

Clausius-Clapeyron equation is valid across the melting curve and the vaporization curve

Melting curve has the highest slope

The critical point exists only for the vaporization curve

Clausius-Clapeyron equation is not valid across the melting curve and the vaporization curve

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Which of the following consideration(s) is/are shown that nuclear beta decay,

, has to be a three-body decay?

Your answerSelect all correct options. You can choose more than one.

Continuous distribution of the electron energy

Spin of the final state

Mass of the electron

Mass of the proton

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Potential energy of two diatomic molecules P and Q of the same reduced mass is shown in the figure. According to this diagram, which of the following option(s) is/are correct?

Your answerSelect all correct options. You can choose more than one.

The equilibrium inter-nuclear distance of Q is more than that of P

The total energy

separates bound and unbound states of the molecules

The lowest vibrational frequency of P is larger than that of Q

Dissociation energy of Q is more than that of P

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Nuclear radiation emitted from a

radioactive source is detected by a photomultiplier tube (PMT) coupled to a scintillator crystal. Which of the following option(s) is/are correct?

Your answerSelect all correct options. You can choose more than one.

radiation from

will directly hit the photocathode of the PMT without interacting with the scintillator crystal and produce a signal

radiation from

source interacts with the scintillator crystal, producing

radiation, which will hit the photocathode of the PMT and produce a signal

A mu-metal shield is put all around the PMT to nullify the effect of external electric fields

A mu-metal shield is put all around the PMT to nullify the effect of external magnetic fields

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One mole of an ideal monatomic gas at absolute temperature

undergoes free expansion to double its original volume, so that the entropy change is

. An identical amount of the same gas at absolute temperature

undergoes isothermal expansion to double its original volume, so that the entropy change is

. The value of

(in integer) is ______

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A linear dielectric sphere of radius

has a uniform frozen-in polarization along the

-axis. The center of the sphere initially coincides with the origin, about which the electric dipole moment is

. When the sphere is shifted to the point

, the corresponding dipole moment with respect to the origin is

. The value of

(in integer) is ______

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The effective magnetic moment (in units of Bohr magneton) for the ground state of an isolated

ion with 6 unpaired electrons in the

shell according to Hund’s rules is (in integer) _____

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Powder X-ray diffraction pattern of a cubic solid with lattice constant

has the (111) diffraction peak at

. If the lattice expands such that the lattice constant becomes

, the angle (in degrees) corresponding to the (111) peak changes to

. The value of

(rounded off to one decimal place) is _____

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Consider a monatomic chain of length 30 cm. The phonon density of states is

s. Assuming the Debye model, the velocity of sound in m/s (rounded off to one decimal place) is _____

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The

baryon with spin

, at rest, decays to a proton and a pion (

). The

has positive intrinsic parity and

has negative intrinsic parity. The orbital angular momentum of the proton-pion system (in integer) is _____

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GATE PH topic:physics PYQs

Question 26

Question 27

Question 28

Question 29

Question 30

Question 31

Question 32

Question 33

Question 34

Question 35