1
AP EAPCET 2025 - 27th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

An AC source of internal resistance $10^3 \Omega$ is connected to a transformer. The ratio of the number of turns in the primary to the number of turns in the secondary to match the source to a load resistance of $10 \Omega$ is

A

$1: 10$

B

$10: 1$

C

$2: 5$

D

$5: 2$

2
AP EAPCET 2025 - 27th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If $11 \%$ of the power of a 200 W bulb is converted to visible radiation, then the intensity of the light at a distance of 100 cm from the bulb is

A

$10.5 \mathrm{~W} \mathrm{~m}^{-2}$

B

$5.25 \mathrm{~W} \mathrm{~m}^{-2}$

C

$3.5 \mathrm{Wm}^{-2}$

D

$1.75 \mathrm{~W} \mathrm{~m}^{-2}$

3
AP EAPCET 2025 - 27th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The de-Broglie wavelength associated with an electron accelerated through a potential difference of $\frac{200}{3} \mathrm{~V}$ is nearly

A

$25 \mathop {\rm{A}}\limits^{\rm{o}}$

B

$2.5 \mathop {\rm{A}}\limits^{\rm{o}}$

C

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

D

$1.5 \mathop {\rm{A}}\limits^{\rm{o}}$

4
AP EAPCET 2025 - 27th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The ratio of the shortest wavelengths of Bracket and Balmer series of hydrogen atom is

A

$2: 1$

B

$3: 2$

C

$4: 1$

D

$6: 5$