NEET 2021 | Electromagnetic Induction Question 7 | Physics

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 :

$${{R_2^2} \over {{R_1}}}$$

$${{{R_1}} \over {{R_2}}}$$

$${{{R_2}} \over {{R_1}}}$$

$${{R_1^2} \over {{R_2}}}$$

NEET 2019

MCQ (Single Correct Answer)

-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 90^o around any of its coplanar axis in 0.1 s, the emf induced in the coil will be :

0.2 V

0.02 V

2 V

2 $$ \times $$ 10^-3 V

NEET 2019

MCQ (Single Correct Answer)

-1

In which of the following devices, the eddy current effect is not used?

magnetic braking in train

electromagnet

electric heater

induction furnace

NEET 2017

MCQ (Single Correct Answer)

-1

A long solenoid of diameter 0.1 m has 2 $$ \times $$ 10⁴ turns per meter. At the centre of the solenoid, a coil of 100 turns and radius 0.01 m is placed with its axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to 0 A from 4 A in 0.05 s. If the resistance of the coil is 10 $$\pi $$² $$\Omega $$, the total charge flowing through the coil during this time is

16 $$\mu $$C

32 $$\mu $$C

16$$\pi $$ $$\mu $$C

32$$\pi $$ $$\mu $$C

Previous Next

NEET Subjects

Biology

Zoology

Human Health and Diseases Body Fluids and Its Circulation Locomotion and Movement Neural Control and Coordination Reproduction in Organisms Reproductive Health Structural Organisation in Animals Digestion and Absorption Excretory Products and Their Elimination Chemical Coordination and Integration Human Reproduction Animal Kingdom Breathing and Exchange of Gases Evolution