The following configuration of the logic gate is equivalent to

1.  NAND gate

2.  XOR gate

3.  OR gate

4.  NOR gate

Concept Questions :-

Logic gates
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Three ideal diodes are connected to the battery as shown in the circuit. The current supplied by the battery is

1.  Zero

2.  4A

3.  2A

4.  6A

Concept Questions :-

PN junction
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

In a common emitter transistor amplifier, the audio signal voltage across resistance of 1 k$\Omega$ is 2V. If the base resistance is 200$\Omega$ and the current amplification factor is 50, the input signal voltage will be

(1) 4 mV

(2) 8 mV

(3) 16 mV

(4) 32 mV

Concept Questions :-

Transistor
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

If a small amount of aluminium is added to the silicon crystal

1.  Its resistance is decreased

2.  It becomes a p-type semiconductor

3.  There will be less free-electron than holes in semiconductor

4.  All of these are correct

Concept Questions :-

Types of semiconductors
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

A transistor is operated in common emitter configuration at  When base current is changed from 10mA to 30mA, it produces a change in emitter current from 2A to 4A, the current amplification factor is

1.  100

2.  99

3.  10

4.  9

Concept Questions :-

Applications of Transistor
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

When a p-n junction is forward biased:

1.  Depletion region becomes thick

2.  p-side is at a higher potential than n side

3.  Current flowing is zero

4.  Effective resistance is of the order of ${10}^{6}\mathrm{W}$

Concept Questions :-

PN junction
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

When a transistor is used as a switch it is in:

1.  Active state

2.  Cut off state

3.  Saturation state

4.  Both cut off state and saturation state are possible

Concept Questions :-

Applications of Transistor
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Use of transistor as an amplifier works in the region -

1.  Cut off region

2.  Saturation region

3.  Passive region

4.  Active region

Concept Questions :-

Applications of Transistor
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Which of the following is correct for n-type semiconductor?

1.  Electron is majority carriers and trivalent atoms are dopants.

2.  Electrons are majority carriers and pentavalent atoms are dopants.

3.  Holes are majority carriers and pentavalent atoms are dopants.

4.  Holes are majority carriers and trivalent atoms are dopants.

Concept Questions :-

Applications of PN junction
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

1.

2.

3.

4.  All of these

Concept Questions :-

Transistor