1
TS EAMCET 2022 (Online) 19th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

What is the mass number of the nucleus having radius equal to $\frac{1}{3}$ of that of ${ }^{189} \mathrm{Os}$ ?

A

20

B

7

C

12

D

14

2
TS EAMCET 2022 (Online) 19th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

The number of silicon atoms per $\mathrm{m}^3$ is $5 \times 10^{28}$. This is doped with $4.5 \times 10^{21}$ atoms $/ \mathrm{m}^3$ of arsenic. The ratio of number of electrons to number of holes after doping is (take $n_i=$ number of thermally generated electrons $=1.5 \times 10^{16} / \mathrm{m}^3$ )

A

$4.5 \times 10^{12}$

B

$8 \times 10^{14}$

C

$9 \times 10^{12}$

D

$9 \times 10^{11}$

3
TS EAMCET 2022 (Online) 19th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

The output of the following circuit is equivalent to $.......$ gate

TS EAMCET 2022 (Online) 19th July Evening Shift Physics - Semiconductor Devices and Logic Gates Question 15 English
A

$O R$

B

AND

C

NOT

D

NAND

4
TS EAMCET 2022 (Online) 19th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following statements is not true?

A

Power radiated from a linear antenna is directly proportional to square of antenna length.

B

Power radiated decreases with increasing frequency.

C

Antenna should have a size comparable to the wavelength of the signal.

D

Effective power radiated by a long wavelength base band signal is small.

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