NEET (National Eligibility cum Medical Entrance Test) Physics: Questions 1695 - 1697 of 2142

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Question number: 1695

» Electronic Devices » Junction Transistor

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.

2 and 4 are correct

b.

1 and 3 are correct

c.

1, 2 and 3 are correct

d.

1 and 2 are correct

Question number: 1696

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

Assertion-Reason▾

Assertion (Ꭺ)

De-morgen’s theorem Equation 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.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are false

Question number: 1697

» Electronic Devices » Junction Transistor

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 = 1mA, I B = 11mA

b.

I E = 11mA, I B = 1mA

c.

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

d.

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

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