JEE Main 2021 (Online) 31st August Evening Shift | Alternating Current and Electromagnetic Induction Question 86 | Physics

JEE Main 2021 (Online) 31st August Evening Shift

MCQ (Single Correct Answer)

-1

Statement - I :

To get a steady dc output from the pulsating voltage received from a full wave rectifier we can connect a capacitor across the output parallel to the load R_L.

Statement - II :

To get a steady dc output from the pulsating voltage received from a full wave rectifier we can connect an inductor in series with R_L.

In the light of the above statements, choose the most appropriate answer from the options given below :

Statement I is true but Statement II is false

Statement I is false but Statement II is true

Both Statement I and Statement II are false

Both Statement I and Statement II are true

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 :

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

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

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

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

JEE Main 2021 (Online) 31st August Morning Shift

MCQ (Single Correct Answer)

-1

In an ac circuit, an inductor, a capacitor and a resistor are connected in series with X_L = R = X_C. Impedance of this circuit is :

2R²

Zero

R$$\sqrt 2 $$

JEE Main 2021 (Online) 27th August Morning Shift

MCQ (Single Correct Answer)

-1

Electric field in a plane electromagnetic wave is given by E = 50 sin(500x $$-$$ 10 $$\times$$ 10¹⁰ t) V/m The velocity of electromagnetic wave in this medium is :

(Given C = speed of light in vacuum)

$${3 \over 2}$$C

$${2 \over 3}$$C

$${C \over 2}$$

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