1
NEET 2018
MCQ (Single Correct Answer)
+4
-1
A thin diamagnetic rod is placed vertically between the poles of an electromagnet. When the current in the electromagnet is switched on, then the diamagnetic rod is pushed up, out of the horizontal magnetic field. Hence the rod gains gravitational potential energy. The work required to do this comes from
A
The current source
B
The magnetic field
C
The lattice structure of the material of the rod
D
The induced electric field due to the changing magnetic field
2
NEET 2017
MCQ (Single Correct Answer)
+4
-1
If $$\theta $$1 and $$\theta $$2 be the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of dip $$\theta $$ is given by
A
tan2$$\theta $$ = tan2$$\theta $$1 + tan2$$\theta $$2
B
cot2$$\theta $$ = cot2$$\theta $$1 $$-$$cot2$$\theta $$2
C
tan2$$\theta $$ = tan2$$\theta $$1 $$-$$ tan2$$\theta $$2
D
cot2$$\theta $$ = cot2$$\theta $$1 + cot2$$\theta $$2
3
NEET 2017
MCQ (Single Correct Answer)
+4
-1
A 250-turn rectangular coil of length 2.1 cm and width 1.25 cm carries a current of 85 $$\mu $$A and subjected to a magnetic field of strength 0.85 T. Work done for rotating the coil by 180o against the torque is
A
4.55 $$\mu $$J
B
2.3 $$\mu $$J
C
1.15 $$\mu $$J
D
9.1 $$\mu $$J
4
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
A bar magnet is hung by a thin cotton thread in a uniform horizontal magnetic field and is in equilibrium state. The energy required to rotate it by 60o is W. Now the torque required to keep the magnet in this new position is
A
$${W \over {\sqrt 3 }}$$
B
$$\sqrt 3 W$$
C
$${{\sqrt 3 W} \over 2}$$
D
$${{2W} \over {\sqrt 3 }}$$
NEET Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12