In a common base amplifier the phase difference between the input signal voltage and the output voltage is

(a) 0                      (b) $\mathrm{\pi }/4$

(c)$\mathrm{\pi }/2$                   (d) $\mathrm{\pi }$

Concept Questions :-

Transistor
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

In NPN transistor the collector current is 10 mA. If 90% of electrons emitted reach the collector, then

(a) Emitter current will be 9 mA
(b) Emitter current will be 11.1 mA
(c) Base current will be 0.1 mA
(d) Base current will be 0.01 mA

Concept Questions :-

Transistor

Difficulty Level:

In a transistor in CE configuration, the ratio of power gain to voltage gain is
(a) $\mathrm{\alpha }$                                      (b) $\mathrm{\beta }/\mathrm{\alpha }$
(c) $\mathrm{\beta \alpha }$                                     (d) $\mathrm{\beta }$

Concept Questions :-

Transistor
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Given below are symbols for some logic gates

The XOR gate and NOR gate respectively are
(a) 1 and 2                  (b) 2 and 3
(c) 3 and 4                  (d) 1 and 4

Concept Questions :-

Logic gates

Difficulty Level:

Given below are four logic gate symbol (figure). Those for OR, NOR and NAND are respectively

(a) 1, 4, 3                     (b) 4, 1, 2
(c) 1, 3, 4                     (d) 4, 2, 1

Concept Questions :-

Logic gates

Difficulty Level:

The following truth table corresponds to the logic gate

A  0  0  1  1
B  0  1  0  1
X  0  1  1  1

(a) NAND                     (b) OR
(c) AND                        (d) XOR

Concept Questions :-

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

Difficulty Level:

The combination of ‘NAND’ gates shown here under (figure) are equivalent to

(a) An OR gate and an AND gate respectively
(b) An AND gate and a NOT gate respectively
(c) An AND gate and an OR gate respectively
(d) An OR gate and a NOT gate respectively.

Concept Questions :-

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

Difficulty Level:

A truth table is given below. Which of the following has this type of truth table

A  0  1  0  1
B  0  0  1  1
y  1  0  0  0

(a) XOR gate                (b) NOR gate
(c) AND gate                (d) OR gate

Concept Questions :-

Logic gates
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Difficulty Level:

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 = 1, C = 0 then the logic states of output D are

(a) 0, 0
(b) 0, 1
(c) 1, 0
(d) 1, 1

Concept Questions :-

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

Difficulty Level:

Boolean algebra is essentially based on

(a) Truth                     (b) Logic
(c) Symbol                  (d) Numbers

Concept Questions :-

Logic gates