Calculate the width of the probability density distribution for r(i.e Br) for hydrogen atom for the state

- a)
- b)
- c)
- d)3a
_{0}

Correct answer is option 'B'. Can you explain this answer?

Roshani Devi answered • 2 hours ago

Tlie width of the probability distribution is given by

width ot probability distribution

width ot probability distribution

The amplifier circuit shown in the figure is implemented using a compensated operational amplier (OP-Amp), and has an open-loop voltage gain, A_{0} = 10^{5} V/V and an open-loop cut-off frequency, f_{c} = 8 Hz.

The voltage gain of the amplifier at 15 kHz. in V/V, is_______________

(Round off to two decimal places)

The voltage gain of the amplifier at 15 kHz. in V/V, is_______________

(Round off to two decimal places)

Correct answer is between '44.34,44.38'. Can you explain this answer?

Kamla Devi answered • 2 hours ago

" Put value" Voltage divison Rule

Gain BW product = Gain BW

For open loop product

In the circuit shown.

The transistor is biased at___________mA (your answer should be upto first decimal place)

The transistor is biased at___________mA (your answer should be upto first decimal place)

Correct answer is between '3.8,4.0'. Can you explain this answer?

Manju answered • 2 hours ago

Since, emitter junction is F.B. So BJT is not in cut-offmode. It maybe either active or saturation region.

Let us assume transistor in active region.

Then, applying KVL at base-emitter loop.

2.7 - 40 K I_{B} -0.7 = 0

40 K I_{B} = 2

I_{B} = 0.05 mA

Applying KVL at emitter collector loop.

Since, V_{CE} < 0.5, so transistor is not in active region it is saturation region.

Let us assume transistor in active region.

Then, applying KVL at base-emitter loop.

2.7 - 40 K I

40 K I

I

Applying KVL at emitter collector loop.

Since, V

A light of intensity I incident on a perfect reflecting wall of angle 30° with the normal to the wall. The pressure

on the wall will be ______ I/C. (answer should be upto one decimal places)

on the wall will be ______ I/C. (answer should be upto one decimal places)

Correct answer is between '1.4,1.6'. Can you explain this answer?

Jaspal Kaur answered • 2 hours ago

Consider n number of photon incident on the wall per second.

Therefore, the change of momentum per second

Therefore, force applied by the photon on the wall is

Therefore, the change of momentum per second

Therefore, force applied by the photon on the wall is

The base of an npn BJT T1 has a linear doping profile N_{B}(x) as shown below. The base of another npn BJT T2 has a uniform doping N_{B} of 10^{17} cm^{-3}. All other parameters are identical for both the devices. Assuming that the hole density profile is the same as that of doping, the common-emitter current gain of T2 is

- a)approximately 0.3 times that of T1
- b)approximately 0.7 times that of T1
- c)approximately 2.5 times that of T1
- d)None of these

Correct answer is option 'D'. Can you explain this answer?

Shalindra Devi answered • 2 hours ago

β

Hence no option is matching.

If the amplitude of a damped - oscillator becomes one - third in 2 minutes, what will be the amplitude of oscillation as compared to initial one after 6 minutes ?

- a)
- b)
- c)
- d)27

Correct answer is option 'A'. Can you explain this answer?

Geeta Devi answered • 2 hours ago

In case of damped oscillations, amplitude decrease exponentially with time , i.e

The phenomenon known as ‘Early effect’ in a bipolar transistor refers to a reduction of the effective-basewidth caused by___

- a)Electron-hole recombination at the base
- b)The reverse biasing of the base-collector junction
- c)The forward biasing of emitter-base junction
- d)The early removal of stored base charge during saturation to cut-off switching

Correct answer is option 'B'. Can you explain this answer?

Om Parkash answered • 2 hours ago

In a bipolar transistor, the increase in the depletion region of the reverse biased junction, tends to decrease the width of the base with increased reverse voltage. This in turn causes the current gain to increase with increased voltage resulting in a nearly linear increase in current even with the device in the saturation.

Tarun Goyal asked • 4 hours ago

On twisting, the denier of a multifilament yarn consisting of 300 filaments of 3 denier each becomes 1100. If 11 km of untwisted filament yarn is twisted, its length in km will be __________.

(**Important** - Enter only the numerical value in the answer)

Correct answer is '9'. Can you explain this answer?

A certain problem is having an algorithm with the following recurrence relation.

Q. How much time would the algorithm take to solve the problem?

Q. How much time would the algorithm take to solve the problem?

- a)
- b)
- c)
- d)

Correct answer is option 'C'. Can you explain this answer?

Anurudh Kumar answered • 2 hours ago

Here Master’s theorem is not applicable directly.

In the circuit shown

- a)
- b)Y = (A + B)C
- c)
- d)Y = AB + C

Correct answer is option 'A'. Can you explain this answer?

Jai Parkash answered • 2 hours ago

Series connection of MOS ⇒ AND operation

The pull-up network acts as an inverter. From pull down network we write

Consider a system of N non-interacting classical linear harmonic oscillates (each of mass m and angular frequency ω) in thermal equilibrium at temperature T. The enthalpy of the system is

- a)
- b)NkT
- c)2 NkT
- d)

Correct answer is option 'B'. Can you explain this answer?

Ram Singh answered • 13 hours ago

Partition function of the system

Helmholtz free energy,

Helmholtz free energy,

If light was of purely wave nature, the total energy radiated by a black-body would be (T is the temperature of the blackbody)

- a)Zero
- b)Proportional to T
^{4 } - c)Proportional to T
- d)Infinite

Correct answer is option 'D'. Can you explain this answer?

Amar Singh answered • 13 hours ago

If light was of purely wave nature, then electromagnetic wave theory predicts that the total energy radiated by a black body over all wavelength is infinite. This is known as ultraviolet catastrophe.

Priya Tanwar asked • 5 hours ago

Our Sun is projected to be a red-giant star after approximately 5 billion years from now. In the red giant phase, the Light that will be emitted will be mostly infrared around a wavelength of 1μw. The Sun is now at 10000K and emitting mostly around light of 0.5 μm wavelength. From tins information, the surface temperature of the red-giant sun is found to be

- a)4000 K
- b)6000 K
- c)5000 K
- d)15000 K

Correct answer is option 'C'. Can you explain this answer?

For the transistor shown below. β = 30 and V_{CEQ} = 6 V. The value ofV_{1} is

- a)2.1 V
- b)6.43 V
- c)4.8 V
- d)3.97 V

Correct answer is option 'D'. Can you explain this answer?

Bhinder Singh answered • 13 hours ago

Given β = 30, V_{CE }= 6 V " quiscent point", V_{1} = ?

We know V_{BE} = 0.7 V, “Si” BJT

K C L at point “A ”

Put value of I_{B}, V_{1} = 3.955

We know V

K C L at point “A ”

Put value of I

The density of states for a system of 4 electrons in a 2-D space having total energy in the range (E, E + dE) is proportional to

- a)E
^{5} - b)E
^{3} - c)E
^{2} - d)E

Correct answer is option 'B'. Can you explain this answer?

Charan Dass answered • 13 hours ago

The number of allowed microstates for N particles are

From the given equilateral triangle below A, B and C run along the sides in clockwise direction and stop after coming sides. Which of the following statements is true?

- a)B is to the west of C
- b)A is to the S-W of B
- c)B is to the N-W of A
- d)C is to the N-E of A

Correct answer is option 'B'. Can you explain this answer?

Raj Kumar answered • 13 hours ago

I Error due to earth’s curvature

II Error due to atmospheric refraction

II Error due to atmospheric refraction

- a)I only
- b)Both I and II
- c)II only
- d)Neither I nor II

Correct answer is option 'A'. Can you explain this answer?

Shiva Tyagi answered • 23 hours ago

Both 1 and 2

The following figure shows the data of students enrolled in 5 years (2014 to 2018) for two schools P and Q. During this period, the ratio of the average number of the students enrolled in school P to the average of the difference of the number of students enrolled in schools P and Q is ________ .

- a)8 : 23
- b)23 : 8
- c)23 : 31
- d)31 : 23

Correct answer is option 'B'. Can you explain this answer?

Moji Ram answered • yesterday

Average number of students in school,

Average number of students in school,

Difference of the number of students enrolled in school P and Q

Ratio of the average number of the students enrolled in school P to the average of the difference of the number of students enrolled in schools P and Q is = 23 : 8

Average number of students in school,

Difference of the number of students enrolled in school P and Q

Ratio of the average number of the students enrolled in school P to the average of the difference of the number of students enrolled in schools P and Q is = 23 : 8

Which one of the following options contains two solutions of the differential equation

- a)
- b)
- c)
- d)

Correct answer is option 'D'. Can you explain this answer?

Harfool Singh answered • yesterday

Given differential equation:

By variable separable method:

and the second solution is for y = 1.

By variable separable method:

and the second solution is for y = 1.

Aadarsh Vikram asked • 5 hours ago

In a CAD package, mirror image of a 2D point P(5, 10) is to be obtained about a line which passes through the origin and makes an angle of 45° counterlockwise with the X-axis. The coordinates of the transformed point will be

- a)(7.5, 5)
- b)(10, 5)
- c)(7.5, -5)
- d)(10, -5)

Correct answer is option 'B'. Can you explain this answer?

SAMARTH NEGI asked • 5 hours ago

Two ammeters X and Y have resistances of 1.2 and 1.5 respectively and they give full scale deflection with 150 mA and 250 mA respectively. The ranges have been extended by connecting shunts so as to give full scale deflection with 15 A. The ammeters along with shunts are connected in parallel and then placed in a circuit in which the total current flowing is 15A. The current in amperes indicated in ammeter X is __________.

Correct answer is '10.157'. Can you explain this answer?

Mousumi Mishra asked • 5 hours ago

A pair of parallel glass panes, each of 3 mm thickness traps 2 mm layer of stagnant air. Thermal conductivities of glass and air are 0.5 and 0.02 W m^{−1} K^{ −1}, respectively. If the film heat transfer coefficient of air is 10 W m^{−2 }K^{−1}, then Biot Number is

- a)1.50
- b)1.00
- c)0.06
- d)0.04

Correct answer is option 'C'. Can you explain this answer?

Neha Lohia asked • 5 hours ago

The circuit shown in the figure uses matched transistors with a thermal voltage V_{T} = 25mV.

The base currents of the transistors are negligible. The value of the resistance R in k Ω that is required to provide 1 μA bias current for the differential amplifier block shown is ______.

The base currents of the transistors are negligible. The value of the resistance R in k Ω that is required to provide 1 μA bias current for the differential amplifier block shown is ______.

Correct answer is between '170,174'. Can you explain this answer?

Deepesh Totla asked • 11 hours ago

The following graph represents the installed capacity for cement production (in tonnes) and the actual production (in tonnes) of nine cement plants of a cement company. Capacity utilization of a plant is defined as ratio of actual production of cement to installed capacity. A plant with installed capacity of at least 200 tonnes is called a large plant and a plant with lesser capacity is called a small plant. The difference between total production of large plants and small plants, in tonnes is ____.

(**Important** - Enter only the numerical value in the answer)

Correct answer is '120'. Can you explain this answer?

Avantika asked • 12 hours ago

The temperature dependence of partition functions are as follows:

According to the conventional transition state theory (CTST), the temperature dependence of the

Arrhenius pre-exponential factorfor a reaction of the type given below is

Arrhenius pre-exponential factorfor a reaction of the type given below is

linear molecule + linear molecule ⇔ non-linear transition state →products

- a)T
^{-1} - b)T
^{0} - c)T
^{1} - d)T
^{2}

Correct answer is option 'A'. Can you explain this answer?

Madhavi Parashar asked • 14 hours ago

In an NGO, t he daily average wages of 20 illiterate employee is decreased from Rs. 25 to Rs. 10. T hus the

average salary of all the literate (educated) and illiterate employees is decreased by Rs. 10 perday. T he

number of educated employees working in the NGO is

average salary of all the literate (educated) and illiterate employees is decreased by Rs. 10 perday. T he

number of educated employees working in the NGO is

- a)15
- b)20
- c)10
- d)25

Correct answer is option 'B'. Can you explain this answer?

Rajni asked • 16 hours ago

The singly reinforced concrete beam section shown in the figure (not drawn to the scale) is made of M25 grade concrete and Fe500 grade reinforcing steel. The total crosssectional area of the tension steel is 942 mm^{2}.

As per Limit State Design of IS 456 : 2000, the design moment capacity (in kNm round off to two decimal places) of the beam section, is __________.

As per Limit State Design of IS 456 : 2000, the design moment capacity (in kNm round off to two decimal places) of the beam section, is __________.

Correct answer is '158.25'. Can you explain this answer?

Sree Shanth asked • 16 hours ago

Which one of the following is not a property of the Liapunov function?

- a)It is a unique function for a given system.
- b)It is positive definite, atleast in the neighbourhood of the origin.
- c)It is a scalar function.
- d)It’s time derivative is non-positive.

Correct answer is option 'A'. Can you explain this answer?

Shantidevi asked • 17 hours ago

A quantum mechanical particle in a harmonic oscillator potential has the initial wave function , where ψ_{0} and ψ_{1} are the real wave functions in the ground and first excited state of the harmonic oscillator. For convenience we take m = ℏ = ψ= 1 for the oscillator. What is the probability density of finding the particle at x at time t = π ?

- a)
- b)
- c)
- d)

Correct answer is option 'A'. Can you explain this answer?

Mohammad Danish asked • 17 hours ago

Thermal death of viable spores of Bacillus subtilis in a food sample follows a first order kinetics

with a specific death rate constant of 0.23 min^{-1} at 100 °C. The time (in minutes) required to kill

99% of spores in the food sample at 100 °C will be

with a specific death rate constant of 0.23 min

99% of spores in the food sample at 100 °C will be

- a)10
- b)20
- c)23
- d)60

Correct answer is option 'B'. Can you explain this answer?

Sheelo Devi asked • 18 hours ago

An engine absorb heat at a temperature of 1000 K and rejects heat at 600 K. If the engine operates at maximum possible efficiency, the amount of work performed by the engine for 2000 J heat input is

- a)1600 J
- b)1200 J
- c)800 J
- d)600 J

Correct answer is option 'C'. Can you explain this answer?

Aadarsh Vikram asked • 19 hours ago

A fillet welded joint is subjected to transverse loading F as shown in the figure. Both legs of the fillets are of 10 mm size and the weld length is 30 mm. If the allowable shear stress of the weld is 94 MPa, considering the minimum throat area of the weld, the maximum allowable transverse load in kN is

- a)14.44
- b)17.92
- c)19.93
- d)22.16

Correct answer is option 'C'. Can you explain this answer?

Pavan Kumar asked • 19 hours ago

A dowel bar is placed at a contraction joint. When contraction occurs, the concrete slab cracks at predetermined location(s). Identify the arrangement, which shows the correct placement of dowel bar and the place of occurrence of the contraction crack(s).

- a)
- b)
- c)
- d)

Correct answer is option 'B'. Can you explain this answer?

Jyoti Koli asked • 19 hours ago

Fact: If it rains, then the field is wet.

Read the following statements:

(i) It rains

(ii) The field is not wet

(iii) The field is wet

(iv) It did not rain

Which one of the options given below is NOT logically possible, based on the given fact?

Read the following statements:

(i) It rains

(ii) The field is not wet

(iii) The field is wet

(iv) It did not rain

Which one of the options given below is NOT logically possible, based on the given fact?

- a)If (iii), then (iv).
- b)If (i), then (iii).
- c)If (i), then (ii).
- d)If (ii), then (iv).

Correct answer is option 'C'. Can you explain this answer?

Ram Kumar asked • 20 hours ago

A train moves towards a stationary observer with speed 34m/sec. The train sounds a whistle and its frequency registered by the observer is f_{1}, if the speed of train is reduced to 17m/sec, the frequency registered is f_{2}, if the speed of sound is 340 m/sec then the ratio f_{1}/f_{2} is ______ .

Correct answer is '1.05'. Can you explain this answer?

Sharafath Sharafath asked • 21 hours ago

For a newly designed vehicle by some students, volume of fuel consumed per unit distance travelled (qf in m3/m) depends upon the viscosity (μ) and density (ρ) of the fuel and, speed (U) and size (L) of the vehicle as

where C is a constant. The dimensions of the constant C are

- a)M
^{0}L^{0}T^{0} - b)M
^{2}L^{-1}T^{-1} - c)M
^{2}L^{-5}T^{-1} - d)M
^{-2}L^{1}T^{1}

Correct answer is option 'B'. Can you explain this answer?

Avantika asked • 23 hours ago

- a)1.2 cm
^{-1} - b)2.0 cm
^{-1} - c)3.0 cm
^{-1} - d)6.0 cm
^{-1}

Correct answer is option 'A'. Can you explain this answer?

Avantika asked • 23 hours ago

- a)20467 cm
^{-1} - b)20469 cm
^{-1} - c)20471 cm
^{-1} - d)20475 cm
^{-1}

Correct answer is option 'B'. Can you explain this answer?

Shubhangi Kumar asked • yesterday

For a flow through a smooth pipe, the Fanning friction factor (f) is given by f =mRe^{−0.2} in the

turbulent flow regime, where Re is the Reynolds number and m is a constant. Water flowing

through a section of this pipe with a velocity 1m/s results in a frictional pressure drop of 10kPa. What

will be the pressure drop across this section (in kPa), when the velocity of water is 2 m/s?

turbulent flow regime, where Re is the Reynolds number and m is a constant. Water flowing

through a section of this pipe with a velocity 1m/s results in a frictional pressure drop of 10kPa. What

will be the pressure drop across this section (in kPa), when the velocity of water is 2 m/s?

- a)11.5
- b)20
- c)34.8
- d)40

Correct answer is option 'C'. Can you explain this answer?

Sumit Jha asked • yesterday

Linked Answer Questions

Statement for Linked Answer Questions 62 and 63:

A material with grain size of ASTM No. 6 has a lattice frictional stress 100 MN/m^{2} and locking parameter

(Hall-Petch constant) 0.10 MN/m^{3/2}

(Hall-Petch constant) 0.10 MN/m

Grain size of the material is approximately

- a)45 μm
- b)45 μm
- c)4.5 μm
- d)3.5 μm

Correct answer is option 'A'. Can you explain this answer?

Aadarsh Vikram asked • yesterday

A wire would enclose an area of 1936 m^{2}, if it is bent into a square. The wire is cut into two pieces. The longer piece is thrice as long as the shorter piece. The long and the short pieces are bent into a square and a circle, respectively. Which of the following choices is closest to the sum of the areas enclosed by the two pieces in square meters?

- a)1096
- b)1111
- c)1243
- d)2486

Correct answer is option 'C'. Can you explain this answer?

SANDEEP SHAH asked • yesterday

The figure below shows a fixed beam of elastic material possessing sufficient ductility and of a uniform cross-section. It carries a uniformly distributed load which is gradually increased to its ultimate value W_{u} per unit length, at which the beam is transformed into a failure mechanism. What is the magnitude of W_{u} in terms of the ultimate moment M_{u} of the beam-section and span L?

- a)
- b)
- c)
- d)

Correct answer is option 'C'. Can you explain this answer?

Mridul Gupta asked • yesterday

The number of emails received on six consecutive days is 11, 9, 18, 18, 4 and 15,

respectively.

respectively.

What are the median and the mode for these data?

- a)18 and 11, respectively
- b)13 and 18, respectively
- c)13 and 12.5, respectively
- d)12.5 and 18, respectively

Correct answer is option 'B'. Can you explain this answer?

Madhura Kalelkar asked • yesterday

A four-storey building with equal areas in each floor is required to be designed on a plot with FAR

of 2.0. If the FAR is increased to 2.2, the percentage increase in ground coverage utilizing full

FAR in both cases will be_____________________

of 2.0. If the FAR is increased to 2.2, the percentage increase in ground coverage utilizing full

FAR in both cases will be_____________________

Correct answer is between '5,10'. Can you explain this answer?

Rama Praba asked • yesterday

A double pulse measurement for an inductively loaded circuit controlled by the IGBT switch is carried out to evaluate the reverse recovery characteristics of the diode. D, represented approximately as a piecewise linear plot of current vs time at diode turn-off.

L_{par} is a parasitic inductance due to the wiring of the circuit, and is in series with the diode. The point on the plot (indicate your choice by entering 1. 2, 3 or 4) at which the IGBT experiences the highest current stress is ______.

L

Correct answer is '3'. Can you explain this answer?

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