1
JEE Main 2016 (Online) 10th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A thin 1 m long rod has a radius of 5 mm. A force of 50 $$\pi $$kN is applied at one end to determine its Young’s modulus. Assume that the force is exactly known. If the least count in the measurement of all lengths is 0.01 mm, which of the following statements is false ?
A
$${{\Delta \gamma } \over \gamma }$$ gets minimum contribution from the uncertainty in the length.
B
The figure of merit is the largest for the length of the rod.
C
The maximum value of $$\gamma $$ that can be determined is 2 $$ \times $$ 1014 N/m2
D
$${{\Delta \gamma } \over \gamma }$$ gets its maximum contribution from the uncertainty in strain
2
JEE Main 2016 (Online) 10th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
To determine refractive index of glass slab using a travelling microscope, minimum number of readings required are :
A
Two
B
Three
C
Four
D
Five
3
JEE Main 2016 (Online) 10th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Velocity-time graph for a body of mass 10 kg is shown in figure. Work-done on the body in first two seconds of the motion is :

JEE Main 2016 (Online) 10th April Morning Slot Physics - Work Power & Energy Question 83 English
A
12000 J
B
$$-$$ 12000 J
C
$$-$$ 4500 J
D
$$-$$ 9300 J
4
JEE Main 2016 (Online) 10th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
In the figure shown ABC is a uniform wire. If centre of mass of wire lies vertically below point A, then $${{BC} \over {AB}}$$ is close to :

JEE Main 2016 (Online) 10th April Morning Slot Physics - Center of Mass and Collision Question 93 English
A
1.85
B
1.37
C
1.5
D
3
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