NEET 2019 | Electromagnetic Induction Question 8 | Physics

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

NEET 2016 Phase 2

MCQ (Single Correct Answer)

-1

A uniform magnetic field is restricted within a region of rafius r. The magnetic field changes with time at a rate $${{d\overrightarrow B } \over {dt}}$$. Loop 1 of radius R > r encloses the region r and loop 2 of radius R is outside the region of magnetic field as shown in the figure. Then the e.m.f. generated is

NEET 2016 Phase 2 Physics - Electromagnetic Induction Question 27 English

NEET 2016 Phase 2 Physics - Electromagnetic Induction Question 27 English

zero in loop 1 and zero in loop 2

$$ - {{d\overrightarrow B } \over {dt}}\pi {r^2}$$ in loop 1 and $$ - {{d\overrightarrow B } \over {dt}}\pi {r^2}$$ in loop 2

$$ - {{d\overrightarrow B } \over {dt}}\pi {R^2}$$ in loop 1 and zero in loop 2

$$ - {{d\overrightarrow B } \over {dt}}\pi {r^2}$$ in loop 1 and zero in loop 2

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