1
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

According to Pascal's law, pressure in a fluid at rest is the same at all points, if

A
they are at the same plane
B
they are at the same height
C
they are along same line
D
Both (a) and (b)
2
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

The surface tension of a liquid at its boiling point

A
becomes zero
B
becomes infinity
C
is equal to the value at room temperature
D
is half of the value at room temperature
3
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

A ball floats on the surface of water in a container exposed to the atmosphere. When the container is covered and the air is partially removed, then the ball

A
rises
B
gets immersed more in water
C
remains immersed at its former depth
D
may rise or sink
4
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

A frame made of metallic wire enclosing a surface area A is covered with a soap film. If the area of the frame of metallic wire is reduced by 50%, then the energy of the soap film will be changed by

A
100%
B
75%
C
50%
D
25%
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