1
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
Two parallel infinite line charges with linear charge densities +$$\lambda $$ C/m and -$$\lambda $$ C/m are placed at a distance of 2R in free space. What is the electric field mid-way between the two line charges?
A
$${{2\lambda } \over {\pi {\varepsilon _0}R}}$$ N/C
B
zero
C
$${\lambda \over {\pi {\varepsilon _0}R}}$$ N/C
D
$${\lambda \over {2\pi {\varepsilon _0}R}}$$ N/C
2
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
A body weight 200 N on the surface of earth. How much will it weight half way down to the centre of the earth?
A
200 N
B
250 N
C
100 N
D
150 N
3
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be angle of refraction?
A
equal to angle of incidence
B
90o
C
180o
D
0o
4
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$$\sqrt 3 $$