NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1696 - 1698 of 2184

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Question number: 1696

» Electronic Devices » Junction Transistor

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MCQ▾

Question

Which of the following are false?

(1) Common base transistor is commonly used because current gain is maximum

(2) Common collector is commonly used because current gain is maximum

(3) Common emitter is the least used transistor

(4) Common emitter is commonly used because current gain is maximum

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

Choices

Choice (4) Response

a.

1,2 and 3 are correct

b.

1 and 2 are correct

c.

2 and 4 are correct

d.

1 and 3 are correct

Question number: 1697

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

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Assertion-Reason▾

Question

Assertion (Ꭺ)

De-morgen’s theorem may be explained by the following circuit

Circuit Diagram for De-morgen’s theorem

Circuit Diagram for De-Morgen’S Theorem

Circuit diagram shows the De-morgen’s theorem.

Reason (Ꭱ)

In the following circuit, for output 1 inputs A, B, C are 1,0, 1.

 Combination of two NAND gates

Combination of Two NAND Gates

In figure combination of two NAND gate circuit is shown.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

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

c.

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

d.

Ꭺ is true but Ꭱ is false

Question number: 1698

» Electronic Devices » Junction Transistor

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MCQ▾

Question

In an NPN transistor circuit, the collector current is 10 mA. If 90 % of the electrons emitted reach the collector, the emitter current (I E) and base current (I B) are given by

Choices

Choice (4) Response

a.

I E = 9mA, I B =- 1mA

b.

I E = 1mA, I B = 11mA

c.

I E =- 1mA, I B = 9mA

d.

I E = 11mA, I B = 1mA