1
JEE Main 2024 (Online) 9th April Morning Shift
+4
-1

A capacitor is made of a flat plate of area A and a second plate having a stair-like structure as shown in figure. If the area of each stair is $$\frac{A}{3}$$ and the height is $$d$$, the capacitance of the arrangement is :

A
$$\frac{11 \epsilon_{\mathrm{o}} \mathrm{A}}{20 \mathrm{~d}}$$
B
$$\frac{13 \epsilon_{\mathrm{o}} \mathrm{A}}{17 \mathrm{~d}}$$
C
$$\frac{18 \epsilon_{\mathrm{o}} \mathrm{A}}{11 \mathrm{~d}}$$
D
$$\frac{11 \epsilon_{\mathrm{o}} \mathrm{A}}{18 \mathrm{~d}}$$
2
JEE Main 2024 (Online) 9th April Morning Shift
+4
-1

A bulb and a capacitor are connected in series across an ac supply. A dielectric is then placed between the plates of the capacitor. The glow of the bulb :

A
becomes zero
B
remains same
C
increases
D
decreases
3
JEE Main 2024 (Online) 8th April Evening Shift
+4
-1

A capacitor has air as dielectric medium and two conducting plates of area $$12 \mathrm{~cm}^2$$ and they are $$0.6 \mathrm{~cm}$$ apart. When a slab of dielectric having area $$12 \mathrm{~cm}^2$$ and $$0.6 \mathrm{~cm}$$ thickness is inserted between the plates, one of the conducting plates has to be moved by $$0.2 \mathrm{~cm}$$ to keep the capacitance same as in previous case. The dielectric constant of the slab is : (Given $$\epsilon_0=8.834 \times 10^{-12} \mathrm{~F} / \mathrm{m}$$)

A
1.50
B
0.66
C
1.33
D
1
4
JEE Main 2024 (Online) 1st February Evening Shift
+4
-1
A galvanometer $(G)$ of $2 \Omega$ resistance is connected in the given circuit. The ratio of charge stored in $C_1$ and $C_2$ is :
A
1
B
$\frac{2}{3}$
C
$\frac{3}{2}$
D
$\frac{1}{2}$
EXAM MAP
Medical
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