Physics
2018 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE PH 2018 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 58–60 of 65. Imported answers require review unless explicitly marked reviewed.
Question 48
Open questionPHNAT2 marksNeeds review
An electromagnetic plane wave is propagating with an intensity
in a medium with
and
. The amplitude of the electric field inside the medium is ______
(up to one decimal place).(
)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 49
Open questionPHNAT2 marksNeeds review
A microcanonical ensemble consists of 12 atoms with each taking either energy 0 state, or energy
state. Both states are non-degenerate. If the total energy of this ensemble is
, its entropy will be ______
(up to one decimal place), where
is the Boltzmann constant.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 50
Open questionPHNAT2 marksNeeds review
A two-state quantum system has energy eigenvalues
corresponding to the normalized states
. At time
, the system is in quantum state
. The probability that the system will be in the same state at
is ______ (up to two decimal places).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 answer