1
JEE Advanced 2020 Paper 1 Offline
+3
-1
An open-ended U-tube of uniform cross-sectional area contains water (density 103 kg m−3 ). Initially the water level stands at 0.29 m from the bottom in each arm. Kerosene oil (a water-immiscible liquid) of density 800 kg m−3 is added to the left arm until its length is 0.1 m, as shown in the schematic figure below. The ratio $$\left( {{{{h_1}} \over {{h_2}}}} \right)$$ of the heights of the liquid in the two arms is :
A
$${{15} \over {14}}$$
B
$${{35} \over {33}}$$
C
$${7 \over 6}$$
D
$${5 \over 4}$$
2
JEE Advanced 2019 Paper 1 Offline
+3
-1
A current carrying wire heats a metal rod. The wire provides a constant power (P) to the rod. The metal rod is enclosed in an insulated container. It is observed that the temperature (T) in the metal rod changes with time (t) as $$T(t) = {T_0}\left( {1 + \beta {t^{{1 \over 4}}}} \right)$$, where $$\beta$$ is a constant with appropriate dimension while T0 is a constant with dimension of temperature. The heat capacity of the metal is
A
$${{4P{{(T(t) - {T_0})}^4}} \over {{\beta ^4}T_0^5}}$$
B
$${{4P{{(T(t) - {T_0})}^3}} \over {{\beta ^4}T_0^4}}$$
C
$${{4P(T(t) - {T_0})} \over {{\beta ^4}T_0^2}}$$
D
$${{4P{{(T(t) - {T_0})}^2}} \over {{\beta ^4}T_0^3}}$$
3
JEE Advanced 2014 Paper 2 Offline
+3
-1

A person in a lift is holding a water jar, which has a small hole at the lower end of its side. When the lift is at rest, the water jet coming out of the hole hits the floor of the lift at a distance d of 1.2 m from the person. In the following, state of the lift’s motion is given in List I and the distance where the water jet hits the floor of the lift is given in List II. Match the statements from List I with those in List II and select the correct answer using the options given below the lists.

List - I List - II
P. Lift is accelerating vertically up. 1. d=1.2 m
Q. Lift is accelerating vertically down
with an acceleration less than the
gravitational acceleration.
2. d > 1.02 m
R. Lift is moving vertically up with
constant speed.
3. d < 1.2 m
S. Lift is falling freely. 4. No water leaks out of the jar
A
P - 2, Q - 3, R - 2, S - 4
B
P - 2, Q - 3, R - 1, S - 4
C
P - 1, Q - 1, R - 1, S - 4
D
P - 2, Q - 3, R - 1, S - 1
4
JEE Advanced 2014 Paper 2 Offline
+3
-1

A glass capillary tube is of the shape of truncated cone with an apex angle $$\alpha$$ so that its two ends have cross sections of different radii. When dipped in water vertically, water rises in it to a height h, where the radius of its cross section is b. If the surface tension of water is S, its density is $$\rho$$, and its contact angle with glass is $$\theta$$, the value of h will be (g is the acceleration due to gravity)

A
$${{2S} \over {b\rho g}}\cos (\theta - \alpha )$$
B
$${{2S} \over {b\rho g}}\cos (\theta + \alpha )$$
C
$${{2S} \over {b\rho g}}\cos (\theta - \alpha /2)$$
D
$${{2S} \over {b\rho g}}\cos (\theta + \alpha /2)$$
EXAM MAP
Medical
NEET