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If the turn ratio of main transformer is Kthen the teaser transformer has turns ratio of 1/k

Atransformeris a device that changes (transforms) and alternating potential difference (voltage) from one value to another value be it smaller or greater using the principle of electromagnetic induction. Atransformerconsists of a soft iron coil with two coils wound around it which are not connected to one another.

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sorry, answer is wrong

P= VI sin phithen I sin phi घटक होगा

Option C

A step down transformer has less turns on the secondary coil that the primary coil. The induced voltage across the secondary coil is less the applied voltage across the primary coil or in other words the voltage is “stepped-down”.

On a step-up transformer there are more turns on the secondary coil than the primary coil. The induced voltage across the secondary coil is greater than the applied voltage across the primary coil or in other words the voltage has been “stepped-up”.

A quantity which has a direction and magnitude is known as a vector quantity. it is represented by a letter with an arrow overhead or a bold capital letter.

two collinear vectors are parallel when they are pointing in the same direction or the angle between them is 0° .two collinear vectors are antiparallel if the angle between them is 180°.

option 1 is correct because value of trigonometric function lies between -1 and 1

For first option A is correct

(a) is a correct answer

Herehere,F1 = 0.108 Nr = 0.5 mF2 = 0.036 Nlet charges on the spheres be q1 and q2 respectively.charges after connection gets redistributed in the spheres , so letcharge on each sphere be q.from conservation of chargeq1 + q2 = 2q...........eq.1

againF1 = k q1q2/r²...........eq.2F2 = k q²/r².............eq.3

=> 0.036 = 9×10⁹ ×q²/(0.5)²=> q² = 0.036× (0.5)²/9×10⁹=> q² = 1×10⁻¹²=> q=1×10⁻⁶ C.............eq.4

from eq 2 and 3F1/F2 = q1q2/q²=> 3 = q1q2/q²3q² = q1q2=> q1q2 = 3q²

again,

(q1₋ q2)² = (q1 + q2)²₋ 4q1q2= (2q)²₋ 3q²/r²= q²/r²

by eq.4(q1₋q2) = q/r=1×10⁻⁶/0.5=2×10⁻⁶..............eq.5

from eq.1 and eq.4q1 + q2 = 4×10⁻⁶..............eq.6

adding 5 and 6q1 = 3×10⁻⁶q1 = 3μC

subtracting 5 from 6q2 = 1×10⁻⁶q2 = 1μC

ChangingTemperature,Changing Density. Most matter increases in volume when it gets hotter. For example, if an iron rodis heated, itwillget longer and fatter and itsdensity willdecrease. This happens because the mass of the rod stays the same, but its volume increases.

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6.. option 3 is correct... as 3 is having most no..of significant figues

7. option 2.

The most accurate reading of the length of a 6.28cm long fibre is 6.5 cm

First note down the difference

(1) 6.28-6 = 0.28

2) 6.5- 6.28 = 0.22

3)6.28-5.99= 0.27

4) 6.28 - 6.0 = 0.28

So, Now compare which is very less difference.

so the nearest accurate to 6.28 is 6.5

height obtained by an object thrown up with u velocity (h) = u^2/2g Hence, ratio of the heights (h1/h2) = u1^2/u2^2Also, since they remain in the air for same duration. So, using first law of motion v = u + atv = 0, t = -u/a, Now here, since the a is same as equal to g and t is same, so u needs to be same. Hence, ratio of heights = 1:1

another method

another method for this que

please send me

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Let the resultant be R.

R^2 = P^2 + Q^2 + 2PQ cos (theta)= (350)^2 + (180)^2 + 2 (350) (180) cos (135°)= 65804.55

R = 256.52 newton

Let R make an angle x with P.

tan (x) = Q sin (theta) / (P + Q cos (theta))= 180 sin (135°) / (350 + 180 cos (135°))= 0.57

x = arctan (0.57) = 29.68°

When the tuning fork is struck, it vibrates rapidly. We cannot see the air molecules bouncing off of the fork because they are invisible to our eyes but we can see sound in something thicker like water. The splash pattern in water is similar to what happens in the air with sound bouncing off in all directions.

The speed of sound waves depends on the medium. The vibrations of tuning fork are transmitted by air. Tuning fork is a solid metal and is different from air, which is a gas. The speed and related properties will be different. If you put the vibrating tuning fork on a drum-skin you will hear different sounds, a light rider on a guitar string will vibrate crazily (differently at different positions on the string).

R^2=F1^2+F2^2+2F1F2costhetacostheta=15^2-12^2-9^2/2*12*9=225-144-81/216=0/216=0hence theta=90°

the same ratio 7:4 ....is the ratio longer to smaller

11:3 is the right answer

ratio of longer force to smaller = (7+4)/(7-4) = 11/3 = 11:3 ( ANS )

11/3 is the right answer.......

(7+4)/(7-4)=11/3 is the right ans.....

11/3 is the right answer.....

11/3 is the right answer

11/3 is the correct answer

The meaning of word ‘Electromagnetic’ is related to the interrelation of electric currents (or fields) and magnetic fields and “Induction” is the process of giving rise to something, which together means the process of generation of an electric current in a closed circuit from magnetic effects, i.e. by changing magnetic fields.

Alnico alloy, an iron alloy withaluminum, nickel and cobalt.

thsnlypu

Let the force of smaller magnitude be A and the force of larger magnitude be B.

here,it is clearly given that the resultant force is R perpendicular to small force. hence, we can say that b is the hyopetenuse .

therefore, b² = R² + A²=> R² = b² - A²= 8²= 64 .......................... ( 1 ).

here, it is also given thatA + B = 16 therefore , B = 16 - A ..........................( 2 ).

Now, by substituting ( 2 ) in ( 1 ).we get,

( 16 - A ) ²- A² = 64=> 256 - 32A + A² - A² = 6432A = 256 - 64 = 192A = 192 / 32 = 6

hence, we get the resultB = 16 - A = 16 - 6 = 10

therefore, the magnitude of the two vectors are 6 and 10.

Sonar(Sound Navigation And Ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate with or detect objects on or under the surface of the water, such as other vessels.

Working:In this method, to find the depth of an ocean, a strong ultrasonic wave is sent from the ship towards the bottom of the ocean.

This ultrasonic wave is received back after it is reflected from the bottom of the sea.

The time interval t for travel of sound waves from the source to the receiver after reflection is noted.

The distance travelled by the ultrasound ray is given by the equation: 2d = vt,where v is the velocity of sound. From this the depth d can be calculated.

Let m be the amount of heat converted into water. If L is the latent heat capacity of steam, then

Heat lost by steam = Heat gained by water

(m * Latent heat of steam) + (m * Latent heat of water * dt) = (mass of water * specific heat capacity of water * change in temperature of water)

mL + m * 1 * (100 – 20) = 100g * Latent heat of water (which is 1) * 5

540m + 80 m = 500

m * 620= 500

m = 500/620 = 0.81 g

Hence, net mass of water = 100 + 0.81 = 100.81 g

Heat capacity = Mass × Specifc heat capacity= 150 × 10^-3 kg × 410 J / (kg K)= 61.5 J / K

Heat capacity of copper is 61.5 J/K

thanx for solution agar AAP math liye hai toh you are next IITian otherwise Dr.

thanks a lot Mayank☺️

Food chain is a model that shows flow of energy and nutrients from one organism to another organism in an ecosystem. The length of a food chain depends upon the number of organisms. It starts from producer species such as tress or grass and ending at apex predator species such as grizzly bears or killer whales; detrivores such as earthworms or woodlice; or decomposer species like fungi or bacteria. A food also shows the relation between organisms as who they are related with each other by the food they eat. Plants and animals requires some type of food for survival. Plant produce their own found via photosynthesis process. Since they produce their own food they are called and producers while those organisms which do not produce their own food like animals and humans are known as consumers.

Food Web:

Food web or food cycle is the connection between food chains and what species eats what in an ecological system. Food web also known as consumer-resource system. Most communities in food web include various populations of producer organisms which are eaten by any number of consumer populations. For example, the green crab is a consumer and decomposer. In food web, producers are eaten by many different consumers, and most consumers onward are eaten by more than one predator. For example, a squirrel eats seeds, fruits, and nuts. The squirrel man be eaten by a fox or a raccoon. Fox also eats mice and grasshoppers , etc. Most organisms are part of several food chains. A food web starts with the producers in ecosystem and then branches off into interconnected food chains that show who eats whom in ecosystem.

Differences:

Following are the main differences between food chain and food web.

1) Food chain is a single linear pathway through which food energy and nutrients travels in the ecosystem while food web is number of interconnected food chains through which energy and nutrients travels in the ecosystem.2) In food chains, usually member of high trophic level feed upon a single type of organism of lower trophic level while in food web members of higher trophic level feed upon many organisms of lower trophic level.3) In food chains, separate and isolated food chains increases the instability of the ecosystem. In food web, stability of the ecosystem increases by the presence of complex food webs.4) Food chains have no effect on improving the adaptability and competitiveness of the organisms while more complex food webs improves the adaptability and competitiveness of the organisms.

weakest force : gravitational Force

Strongest force : strong nuclear force

Fs = mgh

Here h will be the sum total of distance of hand and the original distance as here both KE and PE will work,

Here h=2+0.2=2.2

So, F = mgh/s

F=0.2×10×2.2/0.2

F=10×2.2

F=22N

Newton’s Second Equation

h=ut + 1/2(at^2)

for free fall u = 0 a=g and t=n g is gravity t is time u is initial velocity

therfore h=0+1/2(gn^2)

h is directly proportional to n^2

please let me know if the answer is correct or not

Sound Sentryis a way for Windows to provide visual notifications forsounds. So for instance, when an errorsoundplays, there will also be a visual alert displayed if you have this setting enabled. To enableSound Sentry, work through the following steps

11)According to the present understanding, there are four fundamentalinteractions orforces: gravitation, electromagnetism, the weak interaction, and the strong interaction.

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12)

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This law is applicable only if the following Conditions are met..

1 - Two Bodies having Mass

2 - There must be Some Distance between them

According to Universal Gravitational Law :

(i)The Gravitational force Between two bodies having mass m1 and m2 directly depends on the product of their masses and

(ii) Inversely Proportional to the Square of distance between them...

F = Gravitational force

m1 and m2 are the masses of bodies

r = Distance between the bodies having masses m1 and m2...

Now from statement (i) and (ii) we must have

F = G m1 x m2 / r^2 ----(iii) where G is the constant of proportionality..called Universal gravitational Constant.....

According to relation (iii)..if mass of the body increases then F will increase too...and decreases if the distance between them increases

M is on both side so its dimension is matchedV^2 have dimension m^2/s^2And g*h have m*m/s^2 = m^2/s^2.So the dimension is matched

Describe this question

universal law of gravitation states that every body attracts every other body in the universe with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.