1
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
Change Language

A mouse of mass m jumps on the outside edge of a rotating ceiling fan of moment of inertia I and radius R. The fractional loss of angular velocity of the fan as a result is,

A
$$\frac{m R^{2}}{I+m R^{2}}$$
B
$$\frac{I}{I+m R^{2}}$$
C
$$\frac{I-m R^{2}}{I}$$
D
$$\frac{I-m R^{2}}{I+m R^{2}}$$
2
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
Change Language

Acceleration due to gravity at a height H from the surface of a planet is the same as that at a depth of H below the surface. If R be the radius of the planet, then H vs. R graph for different planets will be,

A
WB JEE 2023 Physics - Gravitation Question 1 English Option 1
B
WB JEE 2023 Physics - Gravitation Question 1 English Option 2
C
WB JEE 2023 Physics - Gravitation Question 1 English Option 3
D
WB JEE 2023 Physics - Gravitation Question 1 English Option 4
3
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
Change Language

A uniform rope of length 4 m and mass 0.4 kg is held on a frictionless table in such a way that 0.6 m of the rope is hanging over the edge. The work done to pull the hanging part of the rope on to the table is, (Assume g = 10 m/s$$^2$$)

A
0.36 J
B
0.24 J
C
0.12 J
D
0.18 J
4
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
Change Language

The displacement of a plane progressive wave in a medium, travelling towards positive x-axis with velocity 4 m/s at t = 0 is given by $$y = 3\sin 2\pi \left( { - {x \over 3}} \right)$$. Then the expression for the displacement at a later time t = 4 sec will be

A
$$y = 3\sin 2\pi \left( { - {x-16 \over 3}} \right)$$
B
$$y = 3\sin 2\pi \left( { {-x-16 \over 3}} \right)$$
C
$$y = 3\sin 2\pi \left( { {-x+1 \over 3}} \right)$$
D
$$y = 3\sin 2\pi \left( { {-x-1 \over 3}} \right)$$
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12