1
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
A mass m is attached to a thin wire and whirled in a vertical circle. The wire is most likely to break when :
A
the wire is horizontal
B
inclined at an angle of 60o from vertical
C
the mass is at the lowest point
D
the mass is at the highest point
2
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
Two particles A and B are moving in uniform circular motion in concentric circles of radii rA and rB with speed vA and vB respecitively. Their time period of rotation is the same. The ratio of angular speed of A to that of B will be :
A
vA : vB
B
1 : 1
C
rB : rA
D
rA : rB
3
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
A 800 turn coil of effective area 0.05 m2 is kept. perpendicular to a magnetic filed 5 × 10–5 T. When the plane of the coil is rotated by 90o around any of its coplanar axis in 0.1 s, the emf induced in the coil will be :
A
0.2 V
B
0.02 V
C
2 V
D
2 $$ \times $$ 10-3 V
4
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
In which of the following processes, heat is neither absorbed nor released by a system?
A
adiabatic
B
isobaric
C
isochoric
D
isothermal