1
AP EAPCET 2025 - 24th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The ratio of energies of photons produced due to transition of an electron in hydrogen atom from second energy level to first energy level and fifth energy level to second energy level is

A

$2: 1$

B

$1: 4$

C

$3: 2$

D

$25: 7$

2
AP EAPCET 2025 - 24th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The half life of a radioactive substance is 10 minutes. If $n_1$ and $n_2$ are the number of atoms decayed in 20 and 30 minutes respectively, then $n_1: n_2=$

A

$7: 8$

B

$1: 2$

C

$6: 7$

D

$3: 4$

3
AP EAPCET 2025 - 24th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If $X, Y$ and $Z$ are the sizes of the emitter, base and collector of a transistor respectively, then

A

$X>Z>Y$

B

$X>Y>Z$

C

$Z>X>Y$

D

$Z>Y>X$

4
AP EAPCET 2025 - 24th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The logic gate equivalent to the circuit given in the figure is

AP EAPCET 2025 - 24th May Morning Shift Physics - Semiconductor Devices and Logic Gates Question 8 English
A

NAND

B

$O R$

C

AND

D

NOR