Physics
2020 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE PH 2020 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 52–54 of 65. Imported answers require review unless explicitly marked reviewed.
Question 42
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Consider the circuit given in the figure. Let the forward voltage drop across each diode be 0.7 V. The current I (in mA) through the resistor is _____.
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Let
denote the 4-velocity of a relativistic particle whose square
. If
is the Levi-Civita tensor then the value of
is _____.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 44
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Consider a simple cubic monoatomic Bravais lattice which has a basis with vectors
,
is the lattice parameter. The Bragg reflection is observed due to the change in the wave vector between the incident and the scattered beam as given by
, where
,
, and
are primitive reciprocal lattice vectors. For
and
, the geometrical structure factor is _____.Log in to check the answer
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