1
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

A square loop of side 1 m and resistance 1 $$\Omega$$ is placed in a magnetic field of 0.5 T. If the plane of loop is perpendicular to the direction of magnetic field, the magnetic flux through the loop is

A
2 weber
B
0.5 weber
C
1 weber
D
Zero weber
2
NEET 2021
MCQ (Single Correct Answer)
+4
-1
Two conducting circular loops of radii R1 and R2 are placed in the same plane with their centres coinciding. If R1 >> R2, the mutual inductance M between them will be directly proportional to :
A
$${{R_2^2} \over {{R_1}}}$$
B
$${{{R_1}} \over {{R_2}}}$$
C
$${{{R_2}} \over {{R_1}}}$$
D
$${{R_1^2} \over {{R_2}}}$$
3
NEET 2019
MCQ (Single Correct Answer)
+4
-1
A 800 turn coil of effective area 0.05 m2 is kept. perpendicular to a magnetic filed 5 × 10–5 T. When the plane of the coil is rotated by 90o around any of its coplanar axis in 0.1 s, the emf induced in the coil will be :
A
0.2 V
B
0.02 V
C
2 V
D
2 $$ \times $$ 10-3 V
4
NEET 2019
MCQ (Single Correct Answer)
+4
-1
In which of the following devices, the eddy current effect is not used?
A
magnetic braking in train
B
electromagnet
C
electric heater
D
induction furnace
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