1
JEE Main 2019 (Online) 10th April Evening Slot
+4
-1
A submarine experiences a pressure of 5.05 × 106 Pa at a depth of d1 in a sea. When it goes further to a depth of d2, it experiences a pressure of 8.08 × 106 Pa. Then d2 –d1 is approximately (density of water = 103 kg/m3 and acceleration due to gravity = 10 ms–2 ) :
A
600 m
B
400 m
C
300 m
D
500 m
2
JEE Main 2019 (Online) 10th April Evening Slot
+4
-1
In an experiment, brass and steel wires of length 1 m each with areas of cross section 1mm2 are used. The wires are connected in series and one end of the combined wire is connected to a rigid support and other end is subjected to elongation. The stress required to produce a net elongation of 0.2 mm is, [Given, the Young's Modulus for steel and brass are, respectively, 120 × 109 N/m2 and 60 × 109 N/m2]
A
8.0 × 106 N/m2
B
1.2 × 106 N/m2
C
0.2 × 106 N/m2
D
1.8 × 106 N/m2
3
JEE Main 2019 (Online) 10th April Evening Slot
+4
-1
A cubical block of side 0.5 m floats on water with 30% of its volume under water. What is the maximum weight that can be put on the block without fully submerging it under water? [Take, density of water = 103 kg/m3]
A
30.1 kg
B
87.5 kg
C
65.4 kg
D
46.3 kg
4
JEE Main 2019 (Online) 10th April Evening Slot
+4
-1
The elastic limit of brass is 379 MPa. What should be the minimum diameter of a brass rod if it is to support a 400 N load without exceeding its elastic limit?
A
1.16 mm
B
1.36 mm
C
1.00 mm
D
0.90 mm
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