JEE Main 2017 (Online) 9th April Morning Slot | Alternating Current and Electromagnetic Induction Question 184 | Physics

JEE Main 2017 (Online) 9th April Morning Slot

MCQ (Single Correct Answer)

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A sinusoidal voltage of peak value 283 V and angular frequency 320/s is applied to a series LCR circuit. Given that R=5 $$\Omega $$, L=25 mH and C=1000 $$\mu $$F. The total impedance, and phase difference between the voltage across the source and the current will respectively be :

10 $$\Omega $$ and tan^$$-$$1 $$\left( {{5 \over 3}} \right)$$

$$7\,\Omega $$ and 45^o

$$10\,\Omega $$ and tan^$$-$$1$$\left( {{8 \over 3}} \right)$$

$$7\,\Omega $$ and tan^$$-$$1$$\left( {{5 \over 3}} \right)$$

JEE Main 2017 (Online) 9th April Morning Slot

MCQ (Single Correct Answer)

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The electric field component of a monochromatic radiation is given by

$$\overrightarrow E $$ = 2 E₀ $$\widehat i$$ cos kz cos $$\omega $$t

Its magnetic field $$\overrightarrow B $$ is then given by :

$${{2{E_0}} \over c}$$ $$\widehat j$$ sin kz cos $$\omega $$t

$$-$$ $${{2{E_0}} \over c}$$ $$\widehat j$$ sin kz sin $$\omega $$t

$${{2{E_0}} \over c}$$ $$\widehat j$$ sin kz sin $$\omega $$t

$${{2{E_0}} \over c}$$ $$\widehat j$$ cos kz cos $$\omega $$t

JEE Main 2017 (Online) 8th April Morning Slot

MCQ (Single Correct Answer)

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A small circular loop of wire of radius a is located at the centre of a much larger circular wire loop of radius b. The two loops are in the same plane. The outer loop of radius b carries an alternating current I = I_o cos ($$\omega $$t). The emf induced in the smaller inner loop is nearly :

$${{\pi {\mu _o}{I_o}} \over 2}.{{{a^2}} \over b}\,\omega \sin \left( {\omega t} \right)$$

$${{\pi {\mu _o}{I_o}} \over 2}.{{{a^2}} \over b}\,\omega \cos \left( {\omega t} \right)$$

$$\pi {\mu _o}{I_o}\,{{{a^2}} \over b}\omega \sin \left( {\omega t} \right)$$

$${{\pi {\mu _o}{I_o}\,{b^2}} \over a}\omega \cos \left( {\omega t} \right)$$

JEE Main 2017 (Offline)

MCQ (Single Correct Answer)

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In a coil of resistance 100 $$\Omega $$, a current is induced by changing the magnetic flux through it as shown in the figure. The magnitude of change in flux through the coil is:

JEE Main 2017 (Offline) Physics - Alternating Current and Electromagnetic Induction Question 190 English