Electronic Devices (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 48 - 52 of 67

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Question number: 48

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

MCQ▾

Question

The combination of gates shown below produces

Circuit diagram of the combination of 4 gates

Circuit Diagram of the Combination of 4 Gates

In figure combination of three NOT gates and a NOR gate is shown. A & B are inputs and Y is a output of this circuit.

Choices

Choice (4) Response

a.

NAND gate

b.

NOR gate

c.

XOR gate

d.

AND gate

Question number: 49

» Electronic Devices » Junction Transistor

MCQ▾

Question

In an NPN transistor 10 10 electrons enter the emitter in 10 -6 s and 2 % electrons recombine with holes in base, then α and β respectively are,

Choices

Choice (4) Response

a.

α = 98, β = 0.49

b.

α = 49, β = 0.98

c.

α = 0.49, β = 98

d.

α = 0.98, β = 49

Question number: 50

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

Assertion-Reason▾

Assertion (Ꭺ)

The following circuit represents ‘OR’ gate

 Circuit diagram consist of logic gates

Circuit Diagram Consist of Logic Gates

Here in circuit output of a NOR gate be the inputs of another NOR gate.

Reason (Ꭱ)

For the above circuit Equation

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is true but Ꭱ is false

d.

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

Question number: 51

» Electronic Devices » Junction Transistor

MCQ▾

Question

The transfer ratio of a transistor is 50. The input resistance of the transistor when used in the common-emitter configuration is 1 KΩ. The peak value for an A. C input voltage of 0.01 V peak is,

Choices

Choice (4) Response

a.

100 μA

b.

0.25 mA

c.

500 μA

d.

0.01 mA

Question number: 52

» Electronic Devices » Junction Transistor

MCQ▾

Question

For transistor, the current amplification factor is 0.8. The transistor is connected in common emitter configuration. The change in the collector current when the base current change by 6 mA is,

Choices

Choice (4) Response

a.

8 mA

b.

4.8 mA

c.

24 mA

d.

6 mA

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