UGC NET Paper 1 — Physics
40 questions across 8 years
Public preview: answer keys and topic tags are available on many questions, while original explanations are being added selectively. Use the filters below for cleaner practice.
By year
By topic
Practice questions
3 questions shown from 2021 in Pollution.
Showing 2021 Pollution questions.
2021 Q36
What will be the resultant of two noise levels of 81 dB and 90 dB generated by two independent sources?
Pollution/answer key
2021 Q39
Noise levels (db) are referenced to the human hearing threshold at a frequency of
Pollution/answer key
2021 Q40
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R Assertion A: The decibel level for a given loudness may be different at differe...
Pollution/answer key