1
JEE Main 2019 (Online) 8th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Suppose that the points (h,k), (1,2) and (–3,4) lie on the line L1 . If a line L2 passing through the points (h,k) and (4,3) is perpendicular to L1 , then $$k \over h$$ equals :
A
$${1 \over 3}$$
B
3
C
0
D
-$${1 \over 7}$$
2
JEE Main 2019 (Online) 8th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
If $$\int {{{dx} \over {{x^3}{{(1 + {x^6})}^{2/3}}}} = xf(x){{(1 + {x^6})}^{{1 \over 3}}} + C} $$
where C is a constant of integration, then the function ƒ(x) is equal to
A
$${3 \over {{x^2}}}$$
B
$$ - {1 \over {6{x^3}}}$$
C
$$ - {1 \over {2{x^3}}}$$
D
$$ - {1 \over {2{x^2}}}$$
3
JEE Main 2019 (Online) 8th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A cell of internal resistance r drives current through an external resistance R. The power delivered by the cell to the external resistance will be maximum when :-
A
R = 1000 r
B
R = r
C
R = 2r
D
R = 0.001 r
4
JEE Main 2019 (Online) 8th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
An electric dipole is formed by two equal and opposite charges q with separation d. The charges have same mass m. It is kept in a uniform electric field E. If it is slightly rotated from its equilibrium orientation, then its angular frequency $$\omega$$ is :-
A
$$\sqrt {{{qE} \over {md}}} $$
B
$$\sqrt {{{qE} \over {2md}}} $$
C
$$\sqrt {{{qE} \over {-2md}}} $$
D
$$\sqrt {{{2qE} \over {md}}} $$
JEE Main Papers
2023
2021
EXAM MAP