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JEE Main 2022 (Online) 26th July Evening Shift
Numerical
+4
-1
Out of Syllabus
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A potentiometer wire of length $$300 \mathrm{~cm}$$ is connected in series with a resistance 780 $$\Omega$$ and a standard cell of emf $$4 \mathrm{V}$$. A constant current flows through potentiometer wire. The length of the null point for cell of emf $$20\, \mathrm{mV}$$ is found to be $$60 \mathrm{~cm}$$. The resistance of the potentiometer wire is ____________ $$\Omega$$.

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2
JEE Main 2022 (Online) 26th July Evening Shift
Numerical
+4
-1
Change Language

As per given figures, two springs of spring constants $$k$$ and $$2 k$$ are connected to mass $$m$$. If the period of oscillation in figure (a) is $$3 \mathrm{s}$$, then the period of oscillation in figure (b) will be $$\sqrt{x}~ s$$. The value of $$x$$ is ___________.

JEE Main 2022 (Online) 26th July Evening Shift Physics - Simple Harmonic Motion Question 38 English

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