1
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
$$\frac{(n-1) R}{n}$$
2
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
3
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
$50 \%$
4
JEE Main 2023 (Online) 31st January Evening Shift
+4
-1
The $\mathrm{H}$ amount of thermal energy is developed by a resistor in $10 \mathrm{~s}$ when a current of $4 \mathrm{~A}$ is passed through it. If the current is increased to $16 \mathrm{~A}$, the thermal energy developed by the resistor in $10 \mathrm{~s}$ will be :
A
$\frac{\mathrm{H}}{4}$
B
$16 \mathrm{H}$
C
H
D
$4 \mathrm{H}$
JEE Main Subjects
Physics
Mechanics
Electricity
Optics
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
Mathematics
Algebra
Trigonometry
Coordinate Geometry
Calculus
EXAM MAP
Joint Entrance Examination