1
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of emf's is
A
3 : 4
B
3 : 2
C
5 : 1
D
5 : 4
2
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
The charge flowing through a resistance R varies with time t is Q = at $$-$$ bt2, where $$a$$ and $$b$$ are positive constants. The total heat produced in R is
A
$${{{a^3}R} \over {2b}}$$
B
$${{{a^3}R} \over {b}}$$
C
$${{{a^3}R} \over {6b}}$$
D
$${{{a^3}R} \over {3b}}$$
3
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
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
$${1 \over 2}$$
4
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
A square loop ABCD carrying a current $$i$$, is placed near and coplanar with a long straight conductor XY carrying a current $$I$$, the net force on the loop will be NEET 2016 Phase 1 Physics - Moving Charges and Magnetism Question 68 English
A
$${{2{\mu _0}liL} \over {3\pi }}$$
B
$${{{\mu _0}liL} \over {2\pi }}$$
C
$${{2{\mu _0}li} \over {3\pi }}$$
D
$${{{\mu _0}li} \over {2\pi }}$$
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12