1
TS EAMCET 2022 (Online) 18th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

A long solenoid has 20 turns per cm. A small loop of area $4 / \pi \mathrm{cm}^2$ is placed inside the solenoid normal to its axis. If the current carried by the solenoid changed steadily from 1.0 A to 3.0 A in 0.2 s , what is the magnitude of the induced emf in the loop while the current is changing?

A

$2.4 \mu \mathrm{~V}$

B

$32 \mu \mathrm{~V}$

C

$72 \mu \mathrm{~V}$

D

$4.8 \mu \mathrm{~V}$

2
TS EAMCET 2022 (Online) 18th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

An AC current is given by the expression, $I(t)=50 \sin (200 \pi t)$ in amperes. The frequency and rms value of the current, respectively are

A

$100 \mathrm{~Hz}, 50 \sqrt{2} \mathrm{~A}$

B

$100 \mathrm{~Hz}, 25 \sqrt{2} \mathrm{~A}$

C

$200 \mathrm{~Hz}, 50 \sqrt{2} \mathrm{~A}$

D

$200 \mathrm{~Hz}, 25 \sqrt{2} \mathrm{~A}$

3
TS EAMCET 2022 (Online) 18th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

An electromagnetic wave is propagating in vacuum along $-\hat{\mathbf{j}}$ direction. The magnetic field of the wave is given by $\mathbf{B}=\left(2 \times 10^{-8}\right) \cos \left[\pi \times 10^{15}\left(t+\frac{y}{c}\right)\right] \hat{\mathbf{k}} \mathrm{T}$. The electric field $\mathbf{E}$ of this wave is ( $c \equiv$ speed of light)

A

$E=4 \cos \left[\pi \times 10^{15}\left(t+\frac{y}{c}\right)\right] \hat{j} \mathrm{~V} / \mathrm{m}$

B

$E=6 \cos \left[\pi \times 10^{15}\left(t+\frac{y}{c}\right)\right] \hat{\mathrm{i}} \mathrm{V} / \mathrm{m}$

C
$\mathbf{E}=6 \cos \left[\pi \times 10^{15}\left(t-\frac{y}{c}\right)\right] \hat{\mathbf{j}} \mathrm{V} / \mathrm{m}$
D

$\mathbf{E}=4 \cos \left[\pi \times 10^{15}\left(t-\frac{y}{c}\right)\right] \hat{\mathbf{j}} \mathrm{V} / \mathrm{m}$

4
TS EAMCET 2022 (Online) 18th July Morning Shift
MCQ (Single Correct Answer)
+1
-0
For photoelectric effect which of the following statements are true. (I) The kinetic energies of the photoelectrons do not depend on the frequency of light. (II) Photoelectric effect will always occur for highly intense light. (III) The maximum kinetic energy of photoelectron does not depend upon the intensity of the light. (IV) The escaping electron's kinetic energy is larger for larger frequency.
A

I and II only

B

II and III only

C

III and IV only

D

IV and I only

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