1
JEE Main 2019 (Online) 12th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
There is a uniform spherically symmetric surface charge density at a distance R0 from the origin. The charge distribution is initially at rest and starts expanding because of mutual repulsion. The figure that represents best the speed V (R(t)) of the distribution as a function of its instantaneous radius R (t) is :
A
JEE Main 2019 (Online) 12th January Morning Slot Physics - Electrostatics Question 159 English Option 1
B
JEE Main 2019 (Online) 12th January Morning Slot Physics - Electrostatics Question 159 English Option 2
C
JEE Main 2019 (Online) 12th January Morning Slot Physics - Electrostatics Question 159 English Option 3
D
JEE Main 2019 (Online) 12th January Morning Slot Physics - Electrostatics Question 159 English Option 4
2
JEE Main 2019 (Online) 11th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
An electric field of 1000 V/m is applied to an electric dipole at angle of 45o. The value of electric dipole moment is 10–29 C.m. What is the potential energy of the electric dipole?
A
- 7 $$ \times $$ 10–27 J
B
$$-$$ 9 $$ \times $$ 10–20 J
C
$$-$$ 10 $$ \times $$ 10–29 J
D
$$-$$ 20 $$ \times $$ 10–18 J
3
JEE Main 2019 (Online) 11th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Three charges Q, + q and + q are placed at the vertices of a right-angle isosceles triangle as shown below. The net electrostatic energy of the configuration is zero, if the value of Q is :

JEE Main 2019 (Online) 11th January Morning Slot Physics - Electrostatics Question 163 English
A
$${{ - q} \over {1 + \sqrt 2 }}$$
B
+ q
C
$$-$$ 2q
D
$${{ - \sqrt 2 q} \over {\sqrt 2 + 1}}$$
4
JEE Main 2019 (Online) 11th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The given graph shows variation (with distance r form centre) of :

JEE Main 2019 (Online) 11th January Morning Slot Physics - Electrostatics Question 162 English
A
Electric field of a uniformly charged sphere
B
Electric field of a uniformly charged spherical shell
C
Potential of a uniformly charged sphere
D
Potential of a uniformly charged spherical shell
JEE Main Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
CBSE
Class 12