1
TG EAPCET 2025 (Online) 2nd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The plane of a circular coil of resistance $7.5 \Omega$ is placed perpendicular to a uniform magnetic field. The flux $\phi$ (in weber) through the coil varies with time $t$ (in second) as $\phi=2 t^2+3 t-2$. The induced power in the coil at time $t=3 \mathrm{~s}$ is

A

7.5 W

B

15 W

C

30 W

D

20 W

2
TG EAPCET 2025 (Online) 2nd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The frequency of an alternating voltage is 50 Hz . The time taken for instantaneous voltage to increase from zero to half of its peak voltage is

A

$\frac{1}{800} \mathrm{~s}$

B

$\frac{1}{600} \mathrm{~s}$

C

$\frac{1}{300} \mathrm{~s}$

D

$\frac{1}{200} \mathrm{~s}$

3
TG EAPCET 2025 (Online) 2nd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The dielectric constant of a medium is 8 and its relative permeability is 200 . If an electromagnetic wave of frequency 100 MHz travels in this medium, then its wavelength is

A

15 m

B

15 cm

C

7.5 m

D

7.5 cm

4
TG EAPCET 2025 (Online) 2nd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Photons of energy 4.5 eV are incident on a photosensitive material of work function 3 eV . The de-Broglie wavelength associated with the photoelectrons emitted with maximum kinetic energy is nearly

A

$10 \mathop {\rm{A}}\limits^{\rm{o}}$

B

$5 \mathop {\rm{A}}\limits^{\rm{o}}$

C

$20 \mathop {\rm{A}}\limits^{\rm{o}}$

D

$15 \mathop {\rm{A}}\limits^{\rm{o}}$

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