1
TS EAMCET 2020 (Online) 10th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

A Zener diode is connected to battery and a load resistance as shown below

TS EAMCET 2020 (Online) 10th September Evening Shift Physics - Semiconductor Devices and Logic Gates Question 9 English

The currents $I, I_Z$ and $I_L$ respectively are

A

$10 \mathrm{~mA}, 5 \mathrm{~mA}, 5 \mathrm{~mA}$

B

$15 \mathrm{~mA}, 7.5 \mathrm{~mA}, 7.5 \mathrm{~mA}$

C

$12.5 \mathrm{~mA}, 5 \mathrm{~mA}, 7.5 \mathrm{~mA}$

D

$12.5 \mathrm{~mA}, 7.5 \mathrm{~mA}, 5 \mathrm{~mA}$

2
TS EAMCET 2020 (Online) 10th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

A semiconductor is doped with phosphorous atoms as impurity. The impurity levels created in the semiconductor are close to the

A

top of the valence band

B

bottom of the conduction band

C

bottom of the valence band

D

top of the conduction band

3
TS EAMCET 2020 (Online) 10th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Assertion (A) Television signals are received through sky-wave propagation.

Reason (R) The ionosphere reflects electromagnetic waves of frequencies in the range ( $3-30) \mathrm{MHz}$.

Choose the correct option.

A

A is true, R is true and R is the correct explanation for A .

B

$A$ is true, $R$ is true but $R$ is not the correct explanation for $A$.

C

$A$ is true but $R$ is false.

D

$A$ is false but $R$ is true.

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