1
JEE Advanced 2022 Paper 1 Online
MCQ (More than One Correct Answer)
+4
-2
Change Language

A medium having dielectric constant $K>1$ fills the space between the plates of a parallel plate capacitor. The plates have large area, and the distance between them is $d$. The capacitor is connected to a battery of voltage $V$, as shown in Figure (a). Now, both the plates are moved by a distance of $\frac{d}{2}$ from their original positions, as shown in Figure (b).

JEE Advanced 2022 Paper 1 Online Physics - Current Electricity Question 9 English

In the process of going from the configuration depicted in Figure (a) to that in Figure (b), which of the following statement(s) is(are) correct?

A
The electric field inside the dielectric material is reduced by a factor of $2 K$.
B
The capacitance is decreased by a factor of $\frac{1}{K+1}$.
C
The voltage between the capacitor plates is increased by a factor of $(K+1)$.
D
The work done in the process DOES NOT depend on the presence of the dielectric material.
2
JEE Advanced 2022 Paper 1 Online
MCQ (More than One Correct Answer)
+4
-2
Change Language

The figure shows a circuit having eight resistances of $1 \Omega$ each, labelled $R_{1}$ to $R_{8}$, and two ideal batteries with voltages $\varepsilon_{1}=12 \mathrm{~V}$ and $\varepsilon_{2}=6 \mathrm{~V}$.

JEE Advanced 2022 Paper 1 Online Physics - Current Electricity Question 8 English

Which of the following statement(s) is(are) correct?

A
The magnitude of current flowing through $R_{1}$ is $7.2 \mathrm{~A}$.
B
The magnitude of current flowing through $R_{2}$ is $1.2 \mathrm{~A}$.
C
The magnitude of current flowing through $R_{3}$ is $4.8 \mathrm{~A}$.
D
The magnitude of current flowing through $R_{5}$ is $2.4 \mathrm{~A}$.
3
JEE Advanced 2020 Paper 2 Offline
MCQ (More than One Correct Answer)
+4
-2
Change Language
Two identical non-conducting solid spheres of same mass and charge are suspended in air from a common point by two non-conducting, massless strings of same length. At equilibrium, the angle between the strings is $$\alpha$$. The spheres are now immersed in a dielectric liquid of density 800 kg m$$-$$3 and dielectric constant 21. If the angle between the strings remains the same after the immersion, then
A
electric force between the spheres remains unchanged
B
electric force between the spheres reduces
C
mass density of the spheres is 840 kg m$$-$$3
D
the tension in the strings holding the spheres remains unchanged
4
JEE Advanced 2020 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-2
Change Language
A uniform electric field, $$\overrightarrow E = - 400\sqrt 3 \widehat y$$ NC−1 is applied in a region. A charged particle of mass m carrying positive charge q is projected in this region with an initial speed of 2$$\sqrt {10} $$ $$ \times $$ 106 ms−1 . This particle is aimed to hit a target T, which is 5 m away from its entry point into the field as shown schematically in the figure.
Take $${q \over m}$$ = 1010 Ckg−1 . Then JEE Advanced 2020 Paper 1 Offline Physics - Current Electricity Question 45 English
A
the particle will hit T if projected at an angle 45o from the horizontal
B
the particle will hit T if projected either at an angle 30o or 60o from the horizontal
C
time taken by the particle to hit T could be $$\sqrt {{5 \over 6}} $$ $$\mu $$s as well as $$\sqrt {{5 \over 2}} $$ $$\mu $$s
D
time taken by the particle to hit T is $$\sqrt {{5 \over 3}} $$ $$\mu $$s
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