1
JEE Main 2019 (Online) 9th April Evening Slot
+4
-1
The area of a square is 5.29 cm2. The area of 7 such squares taking into account the significant figures is :-
A
37.0 cm2
B
37 cm2
C
37.030 cm2
D
37.03 cm2
2
JEE Main 2019 (Online) 9th April Morning Slot
+4
-1
In the density measurement of a cube, the mass and edge length are measured as (10.00 ± 0.10) kg and (0.10 ± 0.01) m, respectively. The error in the measurement of density is :
A
0.01 kg/m3
B
0.10 kg/m3
C
0.31 kg/m3
D
0.07 kg/m3
3
JEE Main 2019 (Online) 8th April Evening Slot
+4
-1
In a simple pendulum experiment for determination of acceleration due to gravity (g), time taken for 20 oscillations is measured by using a watch of 1 second least count. The mean value of time taken comes out to be 30 s. The length of pendulum is measured by using a meter scale of least count 1 mm and the value obtained is 55.0 cm. The percentage error in the determination of g is close to :-
A
0.2%
B
3.5%
C
0.7%
D
6.8%
4
JEE Main 2019 (Online) 8th April Evening Slot
+4
-1
If surface tension (S), Moment of inertia (I) and Planck's constant (h), were to be taken as the fundamental units, the dimensional formula for linear momentum would be :-
A
S1/2I1/2h0
B
S3/2I1/2h0
C
S1/2I1/2h-1
D
S1/2I3/2h-1
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