1
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
A long straight wire of radius $$a$$ carries a steady current $$I$$. The current is uniformly distributed over its cross-section. The ratio of the magnetic fields B and B', at radial distance $${a \over 2}$$ and 2$$a$$ respectively, from the axis of the wire is
A
1
B
4
C
$${1 \over 4}$$
D
$${1 \over 2}$$
2
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
A long solenoid has 1000 turns. When a current of 4 A flows through it, the magnetic flux linked with each turn of the solenoid is 4 $$ \times \,{10^{ - 3}}$$ Wb. The self-inductance of the solenoid is
A
2 H
B
1 H
C
4 H
D
3 H
3
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
Match the corresponding entries of column 1 with column 2. [Where m is the magnification produced by the mirror]

Column 1 Column 2
(A) m = - 2 (p) Convex mirror
(B) m = -$${1 \over 2}$$ (q) Concave mirror
(C) m = +2 (r) Real image
(D) m = +$${1 \over 2}$$ (s) Virtual image
A
A  $$ \to $$  p   and   s;   B $$ \to $$ q and r;   C $$ \to $$ q and s;   D $$ \to $$ q and r
B
A  $$ \to $$  r   and   s;   B $$ \to $$ q and s;   C $$ \to $$ q and r;   D $$ \to $$ p and s
C
A  $$ \to $$  q  and  r;   B $$ \to $$ q and r;   C $$ \to $$ q and s;   D $$ \to $$ p and s
D
A  $$ \to $$  p   and   r;   B $$ \to $$ p and s;   C $$ \to $$ p and q;   D $$ \to $$ r and s
4
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
The angle of incidence for a ray of light at a refracting surface of a prism is 45o. The angle of prism is 60o. If the ray suffers minimum deviation through the prism, the angle of minimum deviation and refractive index of the material of the prism respectively, are
A
$${45^o};\sqrt 2 $$
B
$${30^o};{1 \over {\sqrt 2 }}$$
C
$${45^o};{1 \over {\sqrt 2 }}$$
D
$${30^o};\sqrt 2 $$