JEE Main 2022 (Online) 26th June Morning Shift | Electromagnetic Induction Question 60 | Physics

JEE Main 2022 (Online) 26th June Morning Shift

MCQ (Single Correct Answer)

-1

The magnetic flux through a coil perpendicular to its plane is varying according to the relation $$\phi = (5{t^3} + 4{t^2} + 2t - 5)$$ Weber. If the resistance of the coil is 5 ohm, then the induced current through the coil at t = 2 s will be,

15.6 A

16.6 A

17.6 A

18.6 A

JEE Main 2021 (Online) 1st September Evening Shift

MCQ (Single Correct Answer)

-1

A square loop of side 20 cm and resistance 1$$\Omega$$ is moved towards right with a constant speed v₀. The right arm of the loop is in a uniform magnetic field of 5T. The field is perpendicular to the plane of the loop and is going into it. The loop is connected to a network of resistors each of value 4$$\Omega$$. What should be the value of v₀ so that a steady current of 2 mA flows in the loop?

JEE Main 2021 (Online) 1st September Evening Shift Physics - Electromagnetic Induction Question 65 English

JEE Main 2021 (Online) 1st September Evening Shift Physics - Electromagnetic Induction Question 65 English

1 m/s

1 cm/s

10² m/s

10^$$-$$2 cm/s

JEE Main 2021 (Online) 31st August Evening Shift

MCQ (Single Correct Answer)

-1

A coil is placed in a magnetic field $$\overrightarrow B $$ as shown below :

JEE Main 2021 (Online) 31st August Evening Shift Physics - Electromagnetic Induction Question 64 English

JEE Main 2021 (Online) 31st August Evening Shift Physics - Electromagnetic Induction Question 64 English

A current is induced in the coil because $$\overrightarrow B $$ is :

Outward and decreasing with time

Parallel to the plane of coil and decreasing with time

Outward and increasing with time

Parallel to the plane of coil and increasing with time

JEE Main 2021 (Online) 31st August Morning Shift

MCQ (Single Correct Answer)

-1

A small square loop of side 'a' and one turn is placed inside a larger square loop of side b and one turn (b >> a). The two loops are coplanar with their centres coinciding. If a current I is passed in the square loop of side 'b', then the coefficient of mutual inductance between the two loops is :

$${{{\mu _0}} \over {4\pi }}8\sqrt 2 {{{a^2}} \over b}$$

$${{{\mu _0}} \over {4\pi }}{{8\sqrt 2 } \over a}$$

$${{{\mu _0}} \over {4\pi }}8\sqrt 2 {{{b^2}} \over a}$$

$${{{\mu _0}} \over {4\pi }}{{8\sqrt 2 } \over b}$$

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