1
WB JEE 2020
MCQ (Single Correct Answer)
+2
-0.5
Change Language
Consider the curve $$y = b{e^{ - x/a}}$$, where a and b are non-zero real numbers. Then
A
$${x \over a} + {y \over b}$$ = 1 is tangent to the curve at (0, 0)
B
$${x \over a} + {y \over b}$$ = 1 is tangent to the curve, where the curve crosses the axis of y
C
$${x \over a} + {y \over b}$$ = 1 is tangent to the curve at (a, 0)
D
$${x \over a} + {y \over b}$$ = 1 is tangent to the curve at (2a, 0)
2
WB JEE 2019
MCQ (Single Correct Answer)
+1
-0.25
Change Language
If the radius of a spherical balloon increases by 0.1%, then its volume increases approximately by
A
0.2%
B
0.3%
C
0.4%
D
0.05%
3
WB JEE 2018
MCQ (Single Correct Answer)
+1
-0.25
Change Language
The law of motion of a body moving along a straight line is x = $${1 \over 2}$$ vt. x being its distance from a fixed point on the line at time t and v is its velocity there. Then
A
acceleration f varies directly with x
B
acceleration f varies inversely with x
C
acceleration f is constant
D
acceleration f varies directly with t
4
WB JEE 2018
MCQ (Single Correct Answer)
+2
-0.5
Change Language
A ladder 20 ft long leans against a vertical wall. The top end slides downwards at the rate of 2 ft per second. The rate at which the lower end moves on a horizontal floor when it is 12 ft from the wall is
A
$${{ - 8} \over 3}$$
B
$${6 \over 5}$$
C
$${3 \over 2}$$
D
$${17 \over 4}$$
WB JEE Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12