Tuesday, 30 March 2021

The Size of the Human Heat is almost same size of their Hand Fist || FACTS by SCIENTECHPLUS



Hello dear friends,
welcome to this new concept, so here in this concept you come to know the amazing fact about Human heart.

so let's explore this fact...!!!

You totally surprised to know that, the size of Human heart is size of human fist.
do you know that ?

So friends if you like this interesting facts than tell in the comment box...!!!


Watch this above video in Hindi language, so that you know in simple and easy way.



We will meet you in the next upcoming interesting and mind blowing facts.

Good bye!!!

Thank you...!!!


Sunday, 28 March 2021

Fruits is one of best source of healthy diet for healthy body and mind || by scientechplus


In the modern time era, lot's of people prefer to eat fast food. By as the time move forward, people makes their live full fast.

So in the less time people most of all prefer to eat tasty and oil product food. which is know by the name 'Fast Food'.

It is right to eat sometime, but only for some period of time. But it is not like that, people make this fast food as their nutritional source for health.

Because of that, many crowd you see in the hospital and clinic side of patient.

Did you have any idea about, how this happen ?. It is happen because of our wrong pattern of eating food in out daily routine.

We totally forgotten about our health in the daily load work. But as we all aware about the great thought "Health is Weath".

For all of us heath is our first priority, isn't it? It is totally our responsibility to maintain our health, well and well.

How to maintain health "Well n Well"

By applying proper diet plan in our daily food routine.

Along with good food some fruits also add in your meal for getting best nutritional result.

Grapes : Add grapes in your daily diet plan, to stay fresh in all time of the day. As you know that, this summer season is a grapes season.

So in this season add grapes fruit in your daily nutrition to make fruitful day.



Papaya : Add some papaya fruit in your meal to make pleasant bodily and mentally. Papaya is very good for eyes, hair, immunity problem.

The taste of papaya is such lovely sweet taste. It is very soft to eat. This papaya is eaten by even diabetes patient also.

It is much more safe for all types of disease patient and also healthy people.


Good bye!!!

Thank you...!!!



If sinθ = 7/25, find the values of cosθ and tanθ || Trigonometry sum || by SCIENTECHPLUS


 


Watch in this above given video, you know the complete solved sum easily.



If sinθ = 7/25, find the values of cosθ & tanθ ?

Ans :  By using formula - sin2θ + cos2θ = 1
cos2θ = 1 - sin2θ
cos2θ = 1 - (7/25)2
cos2θ = 1 - (49/625)

By using L.C.M (Least Common Multiple)

cos2θ = (625/652) - (49/625)
cos2θ = (625-49)/625
cos2θ = 576/625

Here we get cos2θ but we want cosθ value, so therefore 
we want cos2θ to cosθ, for that this square on the cos2θ goes on the Right side of the = sign and become square root.

cosθ = √(576/625)

Therefore   cosθ = 24/25



But we have to also, find the tanθ by using formula tanθ = sinθ/cosθ

So in the given formula, put the value of sinθ and cosθ.

tanθ = (7/25)/(24/25)

So the value of tanθ = 7/24



Friday, 26 March 2021

List the application of microwaves and radio waves

 Application of the microwaves


There are several applications of microwaves, but here we mention some application of microwaves.

i) Heating purposes - food stuff

ii) Telecom 

iii) GPS-(Global Position System)

iv) Point-to-point communication

v) Air traffic security cameras

vi) Traffic surveillance

vii) Defense purpose

So these are the some applications of the microwaves.



Application of the Radio waves

i) Radio communication

ii) Broadcasting

iii) Radar

iv) Navigation system

v) Communication network

vi) Remote control toys

vii) Air traffic control

viii) Cellular telephony

So these are the some applications of the radio waves.

List the various waves of the electromagnetic spectrum

 List the various waves of the electromagnetic spectrum !!!

Ans : There are seven types of electromagnetic spectrum.

The seven electromagnetic spectrum is,

• Radio waves

• Microwaves

• Infrared waves

• Visible light rays

• Ultraviolet rays

• X-rays 

• Gamma rays


So these are the seven electromagnetic spectrum.


The Applied Electronics MCQ || Test Revision paper

 The Applied Electronics MCQ || Test Revision paper !!!


1) The types of coupling used in the BJT (Bipolar Junction Transistor) amplifier.

a) Resistance capacitance (RC) coupling.

b) Impedance coupling

c) Transformer coupling

d) All of the above

Answer : (d) All of the above.


2) The phase shift of positive feedback circuit.

a) 90° Degree

b) 180° Degree

c) 45° Degree

d) 0° or 360° Degree

Answer : (d) 0° or 360° Degree.


3) The current gain (β) in the power amplifier.

a) Low 5 to 20

b) Low 40 to 65

c) Low 70 to 95

d) Low 25 to 40

Answer : Low 5 to 20


4) What is the angle of conduction of Class A power amplifier ?

a) 90° Degree angle

b) 180° Degree angle

c) 45° Degree angle

d) 360° Degree angle

Answer : 360° Degree angle


5) What is the angle of conduction of Class B power amplifier ?

a) 90° Degree angle

b) 180° Degree angle

c) 45° Degree angle

d) 360° Degree angle

Answer : 180° Degree angle


6) What is the angle of conduction of Class C power amplifier ?

a) 90° Degree angle

b) 100° to 150° Degree angle

c) 180° to 200° Degree angle

d) 360° Degree angle

Answer : 100° to 150° Degree angle


7) What is the angle of conduction of Class AB power amplifier ?

a) 90° Degree angle

b) 100° to 150° Degree angle

c) 180° to 200° Degree angle

d) 360° Degree angle

Answer : 180° to 200° Degree angle


8) What is the application of single tuned amplifier in the below option.

a) T.V Receiver

b) Radio Receiver

c) Tuned Radio Frequency (TRF) Receiver

d) Both a) T.V Receiver & c) 

Answer : d) Both a) T.V Receiver & c) Tuned Radio Frequency (TRF) Receiver


9) What are the application of RC coupled amplifier.

a) In Tape Recorder

b) In stereo amplifier

c) Widely used as voltage amplifier

d) All of the above

Answer : d) All of the above


10) The different types of power amplifier.

a) Class A power amplifier

b) Class B power amplifier

c)Class C power amplifier

d) All of the above

Answer : d) All of the above

Wednesday, 24 March 2021

The heathy benefits of papaya for healthy body immunity and mental problem


Hello dear all readers,

Welcome to this new concept, so here in this new topic we come to know about the healthy benefits of papaya for healthy body immunity and mental problems.

The papaya is very good for healthy body immunity and mental problems.

The papaya fruit is very soft. The sweet taste of papaya is very tasty.

We must eat papaya at least in a week.

The papaya is one kind of fruit, which we can eat safely in all types of diseases.

Here why we use safely words, means that if you suffer from cold and cough than doctor recommend you to not eat banana fruit and all chill substances.

As we know that banana is not eaten in cold and cough. But we can safely eat papaya in all types of diseases.

Here we know the healthy benefits of eating papaya fruit :

i) The papaya reduced the risk of heart disease.

ii) The papaya reduced the risk of diabetes disease.

iii) The papaya is found to be very helpful in improving blood glucose control in people with diabetes.

iv) The papaya reduced the digestion problems.

v) The papaya is very profitable in lowering the blood pressure.

vi) The papaya reduced the risk of cancer.


Here are the chart table containing by papaya fruit :


• Calories : The papaya contain calories 59

• Carbohydrates : The carbohydrates contain by papaya is 15 gram.

• Fiber : The fibre contain by papaya is 3 gram.

• Protein : The protein contain by papaya is 1 gram.

• Vitamin C : The vitamin C contain by papaya is 157% of the RDI (Recommend Dietary Intake).

• Vitamin A : The vitamin A contain by papaya is 33% of the RDI (Recommend Dietary Intake).

•Vitamin B9 : The vitamin B9 contain by papaya is 14% of the RDI (Recommend Dietary Intake).

• Potassium : The potassium contain by papaya is 11% of the RDI (Recommend Dietary Intake).

And in trace amount the papaya contain calcium, magnesium, vitamin B1, B3, B5, E, and k.

So we hope you feel good to know the knowledge of this papaya fruit.

So we will meet you with next topic.

Goodbye !!!

Thank you...!!!





Monday, 22 March 2021

Today's 2021 year play Holi festival with corona virus with some taking precaution !!!

Happy Holi - 2021

Hello friends,
Welcome to this new topic.

Here in this topic, we come to know about the celebration of Holi festival
in this year 2021.
So in this year also as like as previous year we have to play Holi with lots of care.

 As you all know that, how fastly corona virus spread every where.

So because of that, we have to take patience and keep calm.

We must have to not get too worried about all that dangerous situation created by this pandemic.

Keep calm, stay at home and celebrate this beautiful and lovely Holi festival with great joy.

So here are the some precaution, if we measures than we can absolutely stay safe, while celebration Holi festival this year.

1) Time to time wash your hand.

2) Keep safe distance with each other.

3) Wear properly mask on your nose and mouth.

4) Avoid to play Holi in public places.

5) Keep sanitizer bottle whenever you go outside from home.

Yeah...!!! It is quite not too much interesting to play Holi festival in this corona time.
We have to keep motivated our inner side.

But still we have to play this Holi festival with lots of care.
By god grace this corona pandemic also go away soon.
We have to keep motivated from our inner side.

And we have to not lost our confidence and motivation from our inner side.

Happy Holi to all...!!!
Keep playing, keep enjoying...!!!

Good bye...!!!
Thank you...!!!



Tuesday, 9 March 2021

Explain the refraction of light on the basis of wave theory and also prove the laws of refraction of light.

Explain the refraction of light on the basis of wave theory and also prove the laws of refraction of light.


i) The incident rays, refracted rays and normal lie in the equivalent plane.

ii) The incident ray and refracted ray lie on opposite sides of normal. 

iii) The ratio of velocity of light in rarer medium to velocity of light in denser medium is a constant called refractive index of denser medium with respect to rarer medium.


Explanation laws of refraction :

i) Let consider XY be the plane refracting surface separating two media air and glass of refractive indices μ1 and μ2 serially.

ii) A plane wavefront AB is developing at an angle towards XY from the air medium. It is bounded by the rays AA1 and BB1 which are incident rays.

iii) When point 'A' reaches 'A1' then point 'B' will be at 'P'. It even now has to cover distance PB1 to reach XY.

iv) According to Huygens' principle the secondary waves will originate from A1 and will spread over a hemisphere in the glass.

v) All the rays between AA1 and BB1 will reach XY and spread over the hemispheres of increasing radii in the glass. The surface of tangential of all such hemispheres is RB1. This allow to rise refracted wavefront B1R in the glass.

vi)  A1R and B1R1, are refracted rays.

vii) Let consider c1 and c2 be the velocities of light in air and glass .

viii) At any instant of time 't' distance covered by the incident wavefront from point P to B1 = PB1 = c1t.

The distance covered by the secondary wave from point A1 to R = A1R = c2t. 


Proof of laws of refraction:

i)  From figure,

angle AA1M + angle MA1P = 90° .................................(1)

and angle MA1P+ angle PA1B1 = 90° ...........................(2)

From equations (1) and (2),

angle AA1M = angle PA1B1 = i 

ii) Similarly, angle NA1R = angle N1B1R1 = r

We have, angle N1B1R1 + angle N1B1R = 90°.............(3)

 and angle N1B1R + angle A1B1R = 90° ......................(4)

From equations (3) and (4)

angle N1B1R1 = angle A1B1R = r


iii) In triangle A 1PB1, sin i = PB1/A1B1 = c1t/A1B1................(5)

iv) In triangle A1RB1, sin r = A1R/A1B1 = c2t /A1B1..............(6)

v) Dividing equation (5) by (6),

Therefore sin i/ sin r = c1/ c2....................(7)

Also c1/ c2 = μ2/ μ1 = 1μ2 ......................(8)

Where as 1μ2 = R.I. of water with respect to air,

sin i/ sin r = μ2/ μ1

vi) From the explanation, it is clear that incident rays AA, BB, refracted rays A,R, B,R and normal MN and MIN lie on the same plane XY. Also incident ray AA, and refracted ray AR lie on opposite sides of normal MN. Therefore, laws of refraction can be explained.


THE END

Thank you


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