1
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In a series resonant LCR circuit, for the power dissipated to become half of the maximum power dissipated, the current amplitude is

A

$\frac{1}{\sqrt{2}}$ times its maximum value.

B

$1 / 2$ times its maximum value.

C

twice its maximum value.

D

$\sqrt{2}$ times its maximum value.

2
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The waves having maximum wavelength among the following electromagnetic waves is
A

X-rays

B

radio waves

C

UV-waves

D

visible rays

3
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0
If the de-Broglie wavelength of an electron is 2 nm , then its kinetic energy is nearly (Planck's constant $=6.6 \times 10^{-34} \mathrm{Js}$ and mass of electron $=9 \times 10^{-31} \mathrm{~kg}$ )
A

0.48 eV

B

0.68 eV

C

0.38 eV

D

0.25 eV

4
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The ratio of the wavelengths of the spectral lines emitted due to transitions $3 \rightarrow 2$ and $2 \rightarrow 1$ orbits in the hydrogen atom is
A

$3: 1$

B

$9: 17$

C

$27: 5$

D

$25: 9$