GATE PH 2025 Paper 1 — page 6

Questions 16–18 of 65. Imported answers require review unless explicitly marked reviewed.

Paper practice 65 questionsPage 6 of 22

Which one of the following is correct for the phase velocity

and group velocity

? (

is the speed of light in vacuum)

Your answerChoose one option.

For matter waves in the relativistic case,

For electromagnetic waves in a medium,

represents the speed with which energy propagates

For electromagnetic waves in a medium, both

and

can be more than

For matter waves in free space,

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As per the Drude model of metals, the electrical resistance of a metallic wire of length

and cross-section area

(Consider

as the relaxation time,

as electron mass,

as carrier concentration and

as electron charge)

Your answerChoose one option.

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Which one of the following baryons has strangeness quantum number

Your answerChoose one option.

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2025 · Paper 1