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Q1. | When P-N junction is in forward bias, by increasing the battery voltage |

A. | current through P-N junction reduces [Wrong Answer] |

B. | current through P-N junction increases [Correct Answer] |

C. | circuit resistance increases [Wrong Answer] |

D. | none of the above [Wrong Answer] |

View Answer
Explanation:-
Answer : BDiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ In P-N junction, the region containing the uncompensated acceptor and donor ions is called

transition zone

depletion region

neutral region

active region

⇒ A microstrip line has dielectric having relative permittivity ∈

*. The effective dielectric constant is*

_{r}more than ∈

_{r}equal to 1

less than ∈

_{r}either

*a*or

*b*

⇒ The given figure shows a constant current source driving a parallel RC circuit. It is equivalen

a lag network

a lead network

a lag-lead network

either (a) or (b)

⇒ PAM stands for

Phase Angle Modulation

Phase Amplitude Modulation

Pulse Amplitude Modulation

Pulse Angle Modulation

⇒ A 200 turn coil has a self inductance of 10 mH. If the number of turns is doubled, all other quantities remaining the same, the self inductance will be

2.5 mH

5 mH

20 mH

40 mH

⇒ In a 100% amplitude modulated signal, the power in the upper sideband when carrier power is to be 100 W and modulation system SSBSC, is

100 W

66 W

50 W

25 W

⇒ A constant

*k*low pass filter has

*f*

_{c}= 1000 Hz. At

*f*= 500 Hz, the phase shift is

p

zero

more than p

less than p

⇒ In the output of a DM speech encoder, the consecutive pulses are of opposite polarity during time interval

*t*

_{1}<

*t*<

*t*

_{2}. This indicates that during this interval

the input to the modulator is essentially constant

the modulator is going through slope overload

the accumulator is in saturation

the speech signal is being sampled at the Nyquist rate

⇒ Consider the following statement in B

200, 250, 150 respectively

150, 200, 250 respectively

250, 200, 150 respectively

200, 150, 250 respectively

⇒ If

*e*= 110 sin (ω

*t*+ p/3) and

*i*= 5 sin (ω

*t*- p/3), the impedance of the circuit is

22 Ω

16 Ω

30.8 Ω

11 Ω

⇒ Which of these has lowest dielectric strength?

Dry air

Wet air

Cotton

Paper

⇒ The D.C. alpha(a) of a transistor is approximately

unity

10 to 50

100 to 500

1000 to 5000

⇒ Acoustic strain gauges

have good linearity of measurement

do not have long term stability

have a large range of measurement

have an accuracy range of 0.1-1% depending on environment

⇒

**Assertion (A):** In Darlington pair, the overall β is product of individual β_{s}

**Reason (R):** The voltage gain of a base driven amplifier is equal to ac collector voltage divided by ac base voltage

Both A and R are correct and R is correct explanation for A

Both A and R are correct but R is not correct explanation for A

A is correct R is wrong

A is wrong R is correct

⇒ In intrinsic semiconductor at 300 K, the magnitude of free electron concentration in silicon is about

15 x 10

^{4}per cm

^{3}

5 x 10

^{12}per cm

^{3}

1.45 x 10

^{10}per cm

^{3}

1.45 x 10

^{6}per cm

^{3}

⇒ Virus is a

computer hardware problem

an operating system

a computer program

a computer language

⇒ Two capacitors of 1 μF and 2 μF capacitance are connected in parallel across a 30 V dc battery. After the capacitors have been charged, the charges across the two capacitors will be

30 μC each

60 μC each

30 μC and 60 μC respectively

60 μC and 30 μC respectively

⇒ Diffraction of electromagnetic wave

is caused by reflection from the ground

may occur around the edge of a sharp obstacle

arises only with spherical wavefronts

none of these

⇒ A series circuit has R = 5 Ω and C = 10 μF. At

*t*= 0 it is switched on to a 10 V dc battery. The maximum current in the circuit is

0.0833333333333333

0.0416666666666667

10

^{6}A

10 μA

⇒ Laplacian of a scalar function

*v*is

gradient of

*v*

divergence of

*v*

gradient of the gradient of

*v*

divergence of the gradient of

*v*

⇒ Consider the following statements regarding electro-dynamometer type indicating instrum

1 and 2 are corect

3 and 4 are correct

1 and 3 are correct

1, 2, 3, 4 are correct

⇒ If a dipole is meant for a frequency of 1 MHz, the length of each rod is about

5 m

20 m

100 m

50 m

⇒ Foster Seeley discriminator uses a

double tuned circuit in which primary and secondary are tuned to different frequencies

double tuned circuit in which primary and secondary are tuned to same frequencies

single tuned circuit

three triodes in series

⇒ In a minimum function

the degree of numerator and denominator are equal

the degree of numerator and denominator are unequal

the degree of numerator is one more than degree of denominator

the degree of numerator is one less than degree of denominator

⇒ A single phase semiconverter is feeding a highly inductive load. The circuit has a freewheeling diode across the load and firing angle is a. During one cycle of input voltage, the total duration of conduction of freewheeling diode is

a

2 a

4 a

0.5 a

⇒ In 8085 microprocessor with memory mapped I/O which of the following is true?

I/O devices have 16 bit addresses

I/O devices are accessed during IN and OUT instructions

There can be a maximum of 256 input and 256 output devices

Logic operations can not be performed

⇒ Assume that only

*x*and

*y*logic inputs are available. What is the minimum number of 2-input NAND gates required to implement

*x*⊕

*y*?

2

3

4

5

⇒ Modulation is also called detection.

TRUE

FALSE

⇒ The impulse response

*h*(

*t*) of a linear invariant continuous time system is given by h(

*t*) = exp (- 2

*t*)

*u*(

*t*), where

*u*(

*t*) denotes the unit step function. The output of this system to the sinusoidal input

*x*(

*t*) = 2cos(2

*t*) for all time

*t*, is

0

2

^{-0.25}cos (2

*t*- 0.125p)

2

^{-0.5}cos (2

*t*- 0.125p)

2

^{-0.5}cos (2

*t*- 0.25p)

⇒ India's first three-axis stabilised geostationary communication satellite is

Rohini

Aryabhatta

Apple

Bhaskara