Physics
2022 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE PH 2022 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 64–65 of 65. Imported answers require review unless explicitly marked reviewed.
Question 64
Open questionPHNAT2 marksNeeds review
Frequency bandwidth
of a gas laser of frequency
Hz is
where
at room temperature and
is the atomic mass of the lasing atom. For
laser (wavelength = 633 nm),
Hz. The value of
is ________ (Round off to one decimal place)Log in to check the answer
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Open questionPHNAT2 marksNeeds review
A current of 1 A is flowing through a very long solenoid made of winding density 300 turns/m. As shown in the figure, a parallel plate capacitor, with plates oriented parallel to the solenoid axis and carrying surface charge density
, is placed at the middle of the solenoid. The momentum density of the electromagnetic field at the midpoint
of the capacitor is
. The value of
is ______________ (Round off to the nearest integer)(speed of light
) 
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