1
JEE Main 2023 (Online) 1st February Evening Shift
+4
-1

Given below are two statements : One is labelled as Assertion $$\mathbf{A}$$ and the other is labelled as Reason $$\mathbf{R}$$.

Assertion A : For measuring the potential difference across a resistance of $$600 \Omega$$, the voltmeter with resistance $$1000 \Omega$$ will be preferred over voltmeter with resistance $$4000 \Omega$$.

Reason R : Voltmeter with higher resistance will draw smaller current than voltmeter with lower resistance.

In the light of the above statements, choose the most appropriate answer from the options given below.

A
$$\mathbf{A}$$ is not correct but $$\mathbf{R}$$ is correct
B
Both $$\mathbf{A}$$ and $$\mathbf{R}$$ are correct and $$\mathbf{R}$$ is the correct explanation of $$\mathbf{A}$$
C
$$\mathbf{A}$$ is correct but $$\mathbf{R}$$ is not correct
D
Both $$\mathbf{A}$$ and $$\mathbf{R}$$ are correct but $$\mathbf{R}$$ is not the correct explanation of $$\mathbf{A}$$
2
JEE Main 2023 (Online) 1st February Evening Shift
+4
-1

Equivalent resistance between the adjacent corners of a regular n-sided polygon of uniform wire of resistance R would be :

A
$$\frac{(\mathrm{n}-1) \mathrm{R}}{\mathrm{n}^{2}}$$
B
$$\frac{n^{2} R}{n-1}$$
C
$$\frac{(n-1) R}{(2 n-1)}$$
D
$$\frac{(n-1) R}{n}$$
3
JEE Main 2023 (Online) 1st February Morning Shift
+4
-1

The equivalent resistance between $$A$$ and $$B$$ of the network shown in figure;

A
21 R
B
$$\frac{8}{3}$$ R
C
11$$\frac{2}{3}$$ R
D
14 R
4
JEE Main 2023 (Online) 31st January Evening Shift
+4
-1
The number of turns of the coil of a moving coil galvanometer is increased in order to increase current sensitivity by $50 \%$. The percentage change in voltage sensitivity of the galvanometer will be :
A
$0 \%$
B
$75 \%$
C
$100 \%$
D
$50 \%$
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