Physics
GATE PH concept:energy PYQs
Build your understanding with focused practice from past exam papers.
How to practice concept:energy
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–4 of 4. Imported answers require independent review unless marked reviewed.
Question 49
Open questionPHMSQ2 marksNeeds review
A point charge
is placed at a distance
above an infinite, grounded conducting plate placed on the
plane at
. The electrostatic potential in
region is given by
, where
and
. Which of the following option(s) is/are correct?Your answerSelect all correct options. You can choose more than one.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 53
Open questionPHMSQ2 marksNeeds review
A parallel plate capacitor with spacing
and area of cross-section
is connected to a source of voltage
. If the plates are pulled apart quasistatically to a spacing of
, then which of the following statements are correct?Your answerSelect all correct options. You can choose more than one.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 30
Open questionPHMCQ2 marksNeeds review
Consider a point charge
of mass
suspended by a mass, inextensible string of length
in free space (permittivity
) as shown in the figure. It is placed at a height
(
) over an infinitely large, grounded conducting plane. The gravitational potential energy is assumed to be zero at the position of the conducting plane and is positive above the plane. If
represents the angular position and
its corresponding canonical momentum, then the correct Hamiltonian of the system is 
Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 21
Open questionPHNAT1 markNeeds review
An infinitely long straight wire is carrying a steady current I. The ratio of magnetic energy density at distance
to that at
(= 2
) from the wire is ________.Log in to check the answer
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