18 verified questions · ~20 minutes · answer key checked against the official NTA final key across multiple sources. Text-only questions (diagram-based excluded until they can be shown properly).
The maximum percentage error in the measurement of density of a wire is [Given, mass of wire = (0.60 ± 0.003) g radius of wire = (0.50 ± 0.01) cm length of wire = (10.00 ± 0.05) cm]
A series LCR circuit is connected to an alternating source of emf E. The current amplitude at resonant frequency is I₀. If the value of resistance R becomes twice of its initial value then amplitude of current at resonance will be
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