1
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
A capillary tube of radius r is immersed in water and water rises in it to a height h. The mass of the water in the capillary is 5 g. Another capillary tube of radius 2r is immersed in Water. The mass of water that will rise in this tube is :
A
5.0 g
B
10.0 g
C
20.0 g
D
2.5 g
2
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
A wire of length L, are of cross section A is hanging from a fixed support. The length of the wire changed to L1 when mass M is suspended from its free end. The expression for Young's modulus is :
A
$${{Mg\left( {{L_1} - L} \right)} \over {AL}}$$
B
$${{MgL} \over {A{L_1}}}$$
C
$${{MgL} \over {A\left( {{L_1} - L} \right)}}$$
D
$${{Mg{L_1}} \over {AL}}$$
3
NEET 2019
MCQ (Single Correct Answer)
+4
-1
A copper rod of 88 cm and an aluminium rod of unknown length have their increase in length independent of increase in tmperature. The length of aluminium rod is : ($$\alpha $$Cu = 1.7 × 10–5 K–1 and $$\alpha $$Al = 2.2 × 10–5 K–1)
A
119.9 cm
B
88 cm
C
68 cm
D
6.8 cm
4
NEET 2019
MCQ (Single Correct Answer)
+4
-1
When a block of mass M is suspended by a long wire of length L, the length of the wire becomes (L + $$l$$). The elastic potential energy stored in the extended wire is :
A
Mgl
B
mgL
C
$${1 \over 2}$$Mgl
D
$${1 \over 2}$$MgL
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