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

The light emitted in the transition $n=3$ to $n=2$, (where $n$ is the principal quantum number of the state) in hydrogen is called $\mathrm{H}_\alpha$-light. Find the maximum work function that a metal can have, so that $\mathrm{H}_\alpha$-light can emit photoelectrons from it.

A

1.5 eV

B

2.89 eV

C

1.89 eV

D

3.5 eV

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

As the mass number $A$ increases, which of the following quantities related to a nucleus does not change?

A

Mass

B

Volume

C

Density

D

Binding energy

3
TS EAMCET 2022 (Online) 18th July Morning Shift
MCQ (Single Correct Answer)
+1
-0
In a $p$-type semiconductor, which of the following statements is true?
A

Holes are majority carriers and trivalent atoms are the dopants.

B

Electrons are minority carriers and pentavalent atoms are the dopants.

C

Electrons are majority carriers and trivalent atoms are the dopants.

D

Holes are minority carriers and pentavalent atoms are the dopants.

4
TS EAMCET 2022 (Online) 18th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

In a NAND gate, $A$ and $B$ are inputs and $Y$ is the output, then the correct option is

A

$A=0, B=0, Y=0$

B

$A=0, B=1 ; Y=0$

C

$A=1, B=0, Y=0$

D

$A=1, B=1 ; Y=0$

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