1
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
When an object is shot from the bottom of a long smooth inclined plane kept at an angle 60o with horizontal, it can travel a distance x1 along the plane. But when the inclination is decreased to 30o and the same object is shot with the same velocity, it can travel x2 distance. Then x1 : x2 will be :
A
1 : $$\sqrt 2 $$
B
$$\sqrt 2 $$ : 1
C
1 : $$\sqrt 3 $$
D
1 : 2$$\sqrt 3 $$
2
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following acts as a circuit protection device?
A
inductor
B
conductor
C
switch
D
fuse
3
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
The total energy of an electron in an atom in an orbit is –3.4 eV. Its kinetic and potential energies are, respectively.
A
3.4 eV, – 6.8 eV
B
3.4 eV, 3.4 eV
C
– 3.4 eV, – 3.4 eV
D
– 3.4 eV, – 6.8 eV
4
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
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