1
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
The cylindrical tube of a spray pump has radius R, one end of which has n fine holes, each of radius r. If the speed of the liquid in the tube is V, the speed of the ejection of the liquid through the holes is
A
$${{VR{}^2} \over {{n^3}{r^2}}}$$
B
$${{{V^2}R} \over {nr}}$$
C
$${{V{R^2}} \over {{n^2}{r^2}}}$$
D
$${{V{R^2}} \over {n{r^2}}}$$
2
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
The Young's modulus of steel is twice that of brass. Two wires of same length and of same area of cross section, one of steel and another of brass are suspended from the same roof. If we want the lower ends of the wires to be at the same level, then the weights added to the steel and brass wires must be in the ratio of
A
4 : 1
B
1 : 1
C
1 : 2
D
2 : 1
3
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
An ideal gas is compressed to half its initial volume by means of several processes. Which of the process results in the maximum work done on the gas ?
A
Isochoric
B
Isothermal
C
Adiabatic
D
Isobaric
4
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
The coefficient of performance of a refrigerator is 5. If the temperature inside freezer is $$-$$20oC, the temperature of the surroundings to which it rejects heat is
A
11oC
B
21oC
C
31oC
D
41oC
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