Electronic Devices (NEET Physics): Questions 34 - 37 of 65

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Question number: 34

» Electronic Devices » Semiconductor Diode

MCQ▾

Question

A piece of copper and the other of germanium are cooled from the room temperature to 80 K, then which of the following would be wrong statements?

(1) Resistance of each Increase

(2) Resistance of each Decrease

(3) Resistance of copper increases while that of germanium decreases

(4) Resistance of copper decreases while that of germanium increases

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1 and 3 are correct

b.

2 and 4 are correct

c.

1 and 2 are correct

d.

1, 2 and 3 are correct

Question number: 35

» Electronic Devices » Logic Gates (Or, and, NOT, NAND and NOR)

MCQ▾

Question

For the given combination of gates, if the logic states of inputs A, B, C are as follows A = B = C = 0 and A = B = l, C = 0 then the logic states of output D are

Circite diagram consists of two Logic Gates.

Circite Diagram Consists of Two Logic Gates.

Image of Circite diagram consists of two Logic Gates.

Choices

Choice (4) Response

a.

0, 1

b.

1, 1

c.

0, 0

d.

1, 0

Question number: 36

» Electronic Devices » Logic Gates (Or, and, NOT, NAND and NOR)

MCQ▾

Question

The following truth table is forTable must have a capti

Truth table for logic gate

Here table describe the inputs and output truth table to logic operator

Truth table for logic gate

Here table describe the inputs and output truth table to logic operator

A

B

X

0

0

1

0

1

0

1

0

0

1

1

1

Choices

Choice (4) Response

a.

XNOR

b.

XOR

c.

AND

d.

OR

Question number: 37

» Electronic Devices » Logic Gates (Or, and, NOT, NAND and NOR)

Assertion-Reason▾

Assertion (Ꭺ)

The logic gate NOT cannot be built by using diode.

Reason (Ꭱ)

The output voltage and the input voltage of the diode have 180° phase difference.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Ꭺ is false but Ꭱ is true

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Ꭺ is true but Ꭱ is false

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