P-N Junction Diode

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In an $n$ - $p$ - $n$ transistor circuit, the collector current is $10 mA$ . If $90%$ of the electrons emitted reach the collector

9 mA

(B)

the emitter current will be

11 mA

(C)

the base current will be

1 mA

(D)

the base current will be

- 1 mA

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..........biasing of $p$ - $n$ junction offers high resistance to current flow across the junction. The biasing is obtained by connecting the $p$ -side to the ........ terminal of the battery.

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For the given circuit shown in figure to act as full wave rectifier, the AC input should be connected across ........ and the DC out put would appear across ....... .

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A full wave rectifier circuit along with the output is shown in figure. The contribution (s) from the diode 1 is (are)

* Multiple Correct Options

In a ....... biased $p$ - $n$ junction, the net flow of holes is from the $n$ region to the $p$ region.

JEE Main 1997

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The circuit shown in the figure contains two diodes each with a forward resistance of $50 Ω$ and with infinite backward resistance. If the battery voltage is $6 V$ , the current through the $100 Ω$ resistance (in ampere) is

Two identical $p$ - $n$ junctions may be connected in series with a battery in three ways. The potential drops across the two $p$ - $n$ junctions are equal in

(A)

circuit-1 and circuit-2

(B)

circuit-2 and circuit-3

(C)

circuit-3 and circuit-1

(D)

circuit-1 only

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For a given plate voltage, the plate current in a triode valve is maximum when the potential of

(A)

the grid is positive and plate is negative

(B)

the grid is zero and plate is positive

(C)

the grid is negative and plate is positive

(D)

the grid is positive and plate is positive

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In a $p$ - $n$ junction diode not connected to any circuit

(A)

the potential is the same everywhere.

(B)

the

p

-type side is at a higher potential than the

n

-type side.

(C)

there is an electric field at the junction directed from the

n

-side to the

p

-type side.

(D)

there is an electric field at the junction directed from the

p

-type side to the

n

-type side.

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The dominant mechanisms for motion of charge carriers in forward and reverse biased silicon $p$ - $n$ junctions are

(A)

drift in forward bias, diffusion in reverse bias.

(B)

diffusion in forward bias, drift in reverse bias.

(C)

diffusion in both forward and reverse bias.

(D)

drift in both forward and reverse bias.

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Select the correct statement from the following

(A)

a diode can be used as a rectifier

(B)

a triode cannot be used as a rectifier

(C)

the current in a diode is always proportional to the applied voltage

(D)

the linear portion of the I-V characteristic of a triode is used for amplification without distortion

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In the forward bias arrangement of a $p - n$ junction rectifier, the $p$ end is connected to the ....... terminal of the battery and the direction of the current is from ....... to ...... in the rectifier.

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In a full wave rectifier circuit operating from $50 Hz$ mains frequency, the fundamental frequency in the ripple would be

(A)

50 Hz

(B)

25 Hz

(C)

100 Hz

(D)

70.7 Hz

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In a common-base mode of a transistor, the collector current is $5.488 mA$ for an emitter current of $5.60 mA$ . The value of the base current amplification factor ( $β$ ) will be

(A)

49

(B)

50

(C)

51

(D)

48

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In the following, which one of the diodes is reverse biased?

If in a p-n junction diode, a square input signal of 10 V is applied as shown.

When a diode is forward biased, it has a voltage drop of $0.5 V$ . The safe limit of current through the diode is $10 mA$ . If a battery of emf $1.5 V$ is used in the circuit, the value of minimum resistance to be connected in series with the diode, so that the current does not exceed the safe limit is

(A)

300 Ω

(B)

50 Ω

(C)

100 Ω

(D)

200 Ω

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The circuit has two oppositely connected ideal diodes in parallel. What is the current flowing in the circuit?

The circuit contains two diodes each with a forward resistance of $50 Ω$ and with infinite reverse resistance. If the battery voltage is $6 V$ , the current through the $120 Ω$ resistance is ......... $mA$ .

JEE Main 2019

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At $0.3 V$ and $0.7 V$ , the diodes Ge and Si become conductor respectively. In given figure, if ends of diode Ge overturned, the change in potential $V_{0}$ will be

(A)

0.2 V

(B)

0.6 V

(C)

0.4 V

(D)

0.8 V

JEE Main 2018

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The reading of the ammeter for a silicon diode in the given circuit is

A Zener diode of power rating $2 W$ is to be used as a voltage regulator. If the Zener diode has a breakdown of $10 V$ and it has to regulate voltage fluctuated between $6 V$ and $14 V$ , the value of $R_{S}$ for safe operation should be ........ $Ω$

JEE Main 2021

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For the given circuit, the power across Zener diode is ............ mW.

JEE Main 2021

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In connection with the circuit drawn below, the value of current flowing through $2 k Ω$ resistor is ....... $\times 1 0^{- 4} A$ .

JEE Main 2020

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Two zener diodes ( $A$ and $B$ ) having breakdown voltages of $6 V$ and $4 V$ respectively, are connected as shown in the circuit below. The output voltage $V_{out}$ variation with input voltage linearly increasing with time, is given by ( $V_{in} = 0 V$ at $t = 0$ ) (figures are qualitative)

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } In an n-p-n transistor circuit, the collector current is 10 mA. If 90% of the electrons emitted reach the collector

For the given circuit shown in figure to act as full wave rectifier, the AC input should be connected across ........ and the DC out put would appear across ....... .

A full wave rectifier circuit along with the output is shown in figure. The contribution (s) from the diode 1 is (are)

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } In a ....... biased p-n junction, the net flow of holes is from the n region to the p region.

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } Two identical p-n junctions may be connected in series with a battery in three ways. The potential drops across the two p-n junctions are equal in

For a given plate voltage, the plate current in a triode valve is maximum when the potential of

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } In a p-n junction diode not connected to any circuit

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } The dominant mechanisms for motion of charge carriers in forward and reverse biased silicon p-n junctions are

Select the correct statement from the following

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } In a full wave rectifier circuit operating from 50 Hz mains frequency, the fundamental frequency in the ripple would be

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } In a common-base mode of a transistor, the collector current is 5.488 mA for an emitter current of 5.60 mA. The value of the base current amplification factor (β) will be

In the following, which one of the diodes is reverse biased?

If in a p-n junction diode, a square input signal of 10 V is applied as shown.

The circuit has two oppositely connected ideal diodes in parallel. What is the current flowing in the circuit?

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } At 0.3 V and 0.7 V, the diodes Ge and Si become conductor respectively. In given figure, if ends of diode Ge overturned, the change in potential V0​ will be

The reading of the ammeter for a silicon diode in the given circuit is

For the given circuit, the power across Zener diode is ............ mW.

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } In connection with the circuit drawn below, the value of current flowing through 2kΩ resistor is ....... ×10−4 A.

In an $n$ - $p$ - $n$ transistor circuit, the collector current is $10 mA$ . If $90%$ of the electrons emitted reach the collector

In a ....... biased $p$ - $n$ junction, the net flow of holes is from the $n$ region to the $p$ region.

Two identical $p$ - $n$ junctions may be connected in series with a battery in three ways. The potential drops across the two $p$ - $n$ junctions are equal in

In a $p$ - $n$ junction diode not connected to any circuit

The dominant mechanisms for motion of charge carriers in forward and reverse biased silicon $p$ - $n$ junctions are

In a full wave rectifier circuit operating from $50 Hz$ mains frequency, the fundamental frequency in the ripple would be

In a common-base mode of a transistor, the collector current is $5.488 mA$ for an emitter current of $5.60 mA$ . The value of the base current amplification factor ( $β$ ) will be

At $0.3 V$ and $0.7 V$ , the diodes Ge and Si become conductor respectively. In given figure, if ends of diode Ge overturned, the change in potential $V_{0}$ will be

In connection with the circuit drawn below, the value of current flowing through $2 k Ω$ resistor is ....... $\times 1 0^{- 4} A$ .