Physics
2019 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE PH 2019 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 28–30 of 65. Imported answers require review unless explicitly marked reviewed.
Question 18
Open questionPHNAT1 markNeeds review
The energy-vector (
-
) dispersion relation for a particle in two dimensions is
, where
is a constant. If its density of states
is proportional to
then the value of
isLog in to check the answer
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Open questionPHNAT1 markNeeds review
A circular loop made of a thin wire has radius 2 cm and resistance 2
. It is placed perpendicular to a uniform magnetic field of magnitude
Tesla. At time
the field starts decaying as
, where
s. The total charge that passes through a cross section of the wire during the decay is
. The value of
in
C (rounded off to two decimal places) isLog in to check the answer
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Open questionPHNAT1 markNeeds review
The electric field of an electromagnetic wave in vacuum is given by
The wave is reflected from the
surface. If the pressure exerted on the surface is
, the value of
(rounded off to one decimal place) isLog in to check the answer
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