Semiconductor Electronics · Physics · NEET

The I-V characteristics shown above are exhibited by a...

When the output of an OR gate is applied as input to a NOT gate, then the combination acts as a

The output Y for the inputs A and B of the given logic circuit is: ...

A logic circuit provides the output $$Y$$ as per the following truth table : The expression of the output Y is :...

Consider the following statements A and B and identify the correct answer : A. For a solar-cell, the I-V characteristics lies in the IV quadrant of t...

$$ \text { The output ( } Y \text { ) of the given logic gate is similar to the output of an/a } $$ ...

On the basis of electrical conductivity, which one of the following material has the smallest resistivity?

The given circuit is equivalent to: ...

A p-type extrinsic semiconductor is obtained when Germanium is doped with:

The above figure shows the circuit symbol of a transistor. Select the correct statements given below: (A) The transistor has two segments of p-type s...

Given below are two statements: Statement I : Photovoltaic devices can convert optical radiation into electricity. Statement II : Zener diode is desig...

A full wave rectifier circuit consists of two p-n junction diodes, a centre-tapped transformer, capacitor and a load resistance. Which of these compon...

For the following logic circuit, the truth table is: ...

Identify the equivalent logic gate represented by the given circuit...

The incorrect statement about the property of a Zener diode is :

The collector current in a common base amplifier using n-p-n transistor is 24 mA. If 80% of the electrons released by the emitter is accepted by the c...

In the given circuits (a), (b) and (c), the potential drop across the two p-n junctions are equal in...

As the temperature increases, the electrical resistance

In half wave rectification, if the input frequency is 60 Hz, then the output frequency would be

The truth table for the given logic circuit is...

Consider the following statements (A) and (B) and identify the correct answer.(A) A Zener diode is connected in reverse bias, when used as a voltage r...

The electron concentration in an n-type semiconductor is the same as hole concentration in a p-type semiconductor. An external field (electric) is app...

For the given circuit, the input digital signals are applied at the terminals A, B and C. What would be the output at the terminal y? ...

For transistor action, which of the following statements is correct?

The increase in the width of the depletion region in a p-n junction diode is due to :

For the logic circuit shown, the truth table is : ...

The correct Boolean operation represented by the circuit diagram drawn is : ...

For a p-type semiconductor, which of the following statements is true?

In the circuit shown in the figure, the input voltage Vi is 20 V, VBE = 0 and VCE = 0. The values of IB , IC and $$\beta $$ are given by ...

In the combination of the following gates the output Y can be written in terms of inputs A and B as ...

In a p-n junction diode, change in temperature due to heating

In a common emitter transistor amplifier the audio sgnal voltage across the collector is 3 V. The resistance of collector is 3 k$$\Omega $$. If curren...

Which one of the following represents forward bias diode ?

The given electrical network is equivalent to ...

What is the output Y in the following circuit, when all the three inputs A, B, C are first 0 and then 1 ? ...

The given circuit has two ideal diodes connected as shown in the figure. The current flowing through the resistance R1 will be ...

For CE transistor amplifier, the aufio signal voltage across the collector resistance of 2 k$$\Omega $$ is 4 V. If the current amplification factor of...

Consider the junction diode as ideal. The value of current flowing through AB is ...

A npn transistor is connected in common emitter configuration in a given amplifier. A load resistance of 800 $$\Omega $$ is connected in the collector...

To get output 1 for the following circuit, the correct choice for the input is ...

The input signal given to a CE amplifier having a voltage gain of 150 is Vi = 2cos(15t + $${\pi \over 3}$$). The corresponding output signal will be ...

In the given figure, a diode D is connected to an external resistance R = 100 $$\Omega $$ and an e.m.f. of 3.5 V. If the barrier potential developed a...

If in a p-n junction, a square input signal of 10 V is applied, as shown, then the output across RL will be...

Which logic gate is represented by the following combination of logic gates ? ...

The barrier potential of a p-n junction depends on (1)   type of semiconductor material (2)   amount of doping (3)   t...

The given graph represents V-I characteristic for a semiconductor device. Which of the following statement is correct ? ...

One way in which the operation of a n-p-n transistor differs from that of a p-n-p

In an unbiased p-n junction, holes diffuse from the p-region to n-region because of

The output from a NAND gate is divided into two in parallel and fed to another NAND gate. The resulting gate is a ...

The output (X) of the logic circuit shown ion figure will be ...

In a n-type semiconductor, which of the following statement is true.

In a common emitter (CE) amplifier having a voltage gain G, the transistor used has transconductance 0.03 mho and current gain 25. If the above transi...

To get an output Y= 1 in given circuit which of the following input will be correct ? ...

The input resistance of a silicon transistor is 100 $$\Omega $$. Base current is changed by 40 $$\mu $$A which results in a change in collector curren...

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

In a CE transistor amplifier, the audio signal voltage across the collector resistance of 2 k$$\Omega $$ is 2 V. If the base resistance is 1 k$$\Omega...

Transfer characteristics [output voltage (V0) vs input voltage (Vi)] for a base biased transistor in CE configuration is as shown in the figure. For u...

The figure shows a logic circuit with two inputs A and B and the output C. The voltage wave forms across A, B and C are as given. The logic circuit g...

C and Si both have same lattice structure; having 4 bonding electrons in each. However, C is insulator where as Si is intrinsic semiconductor. This is...

Pure Si at 500 K has equal number of electron (ne) and hole (nh) concentrations of 1.5 $$ \times $$ 1016 m$$-$$3. Doping by indium increases nh to 4.5...

In the following figure, the diodes which are forward biased, are ...

A Zener diode, having breakdown voltage equal to 15 V, is used in a voltage regulator circuit shown in figure. The current through the diode is ...

In forward biasing of the p-n junction

Symbolic representation of four logic gates are shown as Pick out which ones are for AND, NAND and NOT gates, respectively...

A transistor is operated in common emitter configuration at VC = 2 V such that a change in the base current from 100 $$\mu $$A to 300 $$\mu $$A produc...

If a small amount of antimony is added to germanium crystal

The following figure shows a logic gate circuit with two inputs A and B and the output Y. The voltage waveforms of A, B and Y are as given. The logi...

For transistor action (1)  Base, emitter and collector regions should have similar size and doping concentrations. (2)  The base ...

A common emitter amplifier has a voltage gain of 50, an input impedance of 100 $$\Omega $$ and an output impedance of 200 $$\Omega $$. The power gain ...

Which one of the following bonds produces a solid that reflects light in the visible region and whose electrical conductivity decreases with temperat...

The device that can act as a complete electronic circuit is

Which one of the following statement is false ?

To get an output Y = 1 in given circuit which of the following input will be correct ? ...

Sodium has body centred packing. Distance between two nearest atoms is 3.7 $$\mathop A\limits^ \circ $$. The lattice parameter is

A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV. It can detect a signal of wavelength

A transistor is operated in common-emitter configuration at VC = 2V such that a change in the base current from 100 $$\mu $$A to 200 $$\mu $$A produce...

The symbolic representation of four logic gates are given below The logic symbols for OR, NOT and NAND gates are respectively...

If the lattice parameter for a crystalline structure is 3.6 $$\mathop A\limits^ \circ $$, then the atomic radius in fcc crystal is

The voltage gain of an amplifier with 9% negative feedback is 10. The voltage gain without feedback will be

A p-n photodiode is made of a material with a band gap of 2.0 eV. The minimum frequency of the radiation that can be absorbed by the material is nearl...

In the energy band diagram of a material shown below, the open circles and filled circles denote holes and electrons respectively. The material is ...

For a cubic crystal structure which one of the following relations indicating the cell characteristics is correct ?

Which one of the following represents forward bias diode ?

In the following circuit, the output Y for all possible inputs A and B is expressed by the truth table. ...

Which one of the following represents forward bias diode ?

A transistor is operated in common emitter configuration at constant collector voltage VC = 1.5 V such that a change in the base current from 100 $$\m...

The following figure shows a logic gate circuit with two inputs A and B and the output C. The voltage waveforms of A, B and C are as shown below. ...

Carbon, silicon and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented...

Copper has face centered cubic (fcc) lattice with interatomic spacing equal to 2.54 $$\mathop A\limits^ \circ $$. The value of lattice constant for t...

In a p-n junction photo cell, the value of the photo-electromotive force profuced by monochromatic light is proportional to

Zener diode is used for

Application of a forward bias to a p-n junction

Choose the only false statement from the following.

Of the diodes shown in the following diagrams, which one is reverse biased ?

The output of OR gate is 1

The peak voltage in the output of a half wave diode rectifier fed with a sinusoidal signal without filter is 10 V. The d.c. component of the output vo...

In semiconductors at a room temperature

A n-p-n transistor conducts when

Reverse bias applied to a junction diode

If a full wave rectifier circuit is operating from 50 Hz mains, the fundamental frequency in the ripple will be

Barrier potential of a p-n junction diode does not depened on

For the given circuit of p-n junction diode which is correct ...

In a p-n junction

The given truth table is for which logic gate               $$\matrix{ A &am...

Number of atom per unit cell in B.C.C.

For a transistor $${{{I_C}} \over {{I_E}}}$$ = 0.96, then current gain for common emitter is

The given truth table is for which logic gate               $$\matrix{ A &am...

The current in the circuit will be ...

For a common base circuit if $${{{I_C}} \over {{I_E}}}$$ = 0.98 then current gain for common emitter circuit will be

From the following diode circuit, which diode is in forward biased condition

The correct relation for $$\alpha $$, $$\beta $$ for a transistor

The cations and anions are arranged in alternate form in