Physics
2026 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE PH 2026 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 61–63 of 65. Imported answers require review unless explicitly marked reviewed.
Question 61
Open questionPHNAT2 marksNeeds review
A capacitor is made of two circular metal plates of radius 1 m separated by a distance of
mm. The space between them is filled by a dielectric with permittivity
. The capacitor is connected to a voltage
volts, where
is in seconds. The maximum value of the magnetic field in between the plates at a radial distance
m from the centre of the capacitor is
T. The value of
(rounded off to two decimal places) is _____(Speed of light in vacuum
m.s
)Log in to check the answer
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Open questionPHNAT2 marksNeeds review
Rotational spectrum of a diatomic molecule consists of lines of equal spacing with an interval of 20 cm
. Its moment of inertia is found to be
kg m
, the value of
(rounded off to one decimal place) is _____(
J.s, speed of light in vacuum
m.s
)Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 63
Open questionPHNAT2 marksNeeds review
Copper has an electron number density of
m
. Its Fermi energy in eV (rounded off to one decimal place) is _____(
J.s, mass of electron
kg, charge of electron =
C)Log in to check the answer
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