CBSE > Class 11 > Physics | CBSE Board | Homework Help

60 minutes is the same as 1 hour, or 1000 meters is the same as 1 kilometer, or 12 months is the same as 1 year. Let us try to understand it in this way. Imagine you have 15 pens and you multiply that by 1, now you still have the same number of 15 pens.

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What is resolution in unit and measurements chap

Posted by Kapildev Karan 4 years, 3 months ago

CBSE > Class 11 > Physics

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Distinguish between geostationary and polar satellite

Posted by Rose Maria 4 years, 3 months ago

CBSE > Class 11 > Physics

3 answers

Gagandeep Singh 4 years, 3 months ago

Ja is svhejsi

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༄ᶦᶰᵈ᭄༒ツⓋⓘⓝⓔⓔⓣ Ｋｕｍａｒ༒ 4 years, 3 months ago

POLAR SATELLITE: These satellites are mainly situated upto 200km to 2000km from the earth’s surface. Some of the examples of polar satellites are pslv, aslv etc. Main functions of polar satellites land mapping: polar satellites are used for land mapping and the availability of useful land on the earth. In India for that cortosat 1a is responsible for land mapping. Also cortosat 1b which gives info about agricultural aspects .some other satellites which are involved in this are cortosat 2. disaster management: After the disaster of Uttarakhand GOI launched a satellite named SARSAT(save and rescue satellite). The main purpose of SARSAT was to find missing people. GEOSTATIONARY SATELLITE: The satellites which are located 20000 to 36000 km away from the surface of earth. Main functions are: telecommunication navigation

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Sia ? 4 years, 3 months ago

POLAR SATELLITE: These satellites are mainly situated upto 200km to 2000km from the earth’s surface. Some of the examples of polar satellites are pslv, aslv etc.
Main functions of polar satellites

land mapping: polar satellites are used for land mapping and the availability of useful land on the earth. In India for that cortosat 1a is responsible for land mapping. Also cortosat 1b which gives info about agricultural aspects .some other satellites which are involved in this are cortosat 2.
disaster management: After the disaster of Uttarakhand GOI launched a satellite named SARSAT(save and rescue satellite). The main purpose of SARSAT was to find missing people.

GEOSTATIONARY SATELLITE: The satellites which are located 20000 to 36000 km away from the surface of earth.
Main functions are:

telecommunication
navigation

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Give da central idea of da poem

Posted by Arshdeep Kaur Asrhu 4 years, 3 months ago

CBSE > Class 11 > Physics

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What does planks constant mean ?

Posted by Poonam Mittewad 4 years, 3 months ago

CBSE > Class 11 > Physics

2 answers

Poonam Mittewad 4 years, 3 months ago

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Sia ? 4 years, 3 months ago

The Planck constant, or Planck's constant, is a fundamental physical constant denoted h, and is of fundamental importance in quantum mechanics. A photon's energy is equal to its frequency multiplied by the Planck constant. Due to mass–energy equivalence, the Planck constant also relates mass to frequency.

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What are hypothesis axioms and models

Posted by Shashwat Singh 4 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 4 years, 3 months ago

Hypothesis, Axiom and Models. Hypothesis is a supposition without assuming that it is true. It may not be proved but can be verified through a series of experiments. Axiom is a self-evident truth that it is accepted without controversy or question. Model is a theory proposed to explain observed phenomena.

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Two forces P and Q acting at a point at an angle theta how their resultant (2n+1)

Posted by Prabhleen Kaur 4 years, 3 months ago

CBSE > Class 11 > Physics

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find aunit vector parallel to 4i+3j+6k plssssss...help me

Posted by Sanchita Chavan 4 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Preeti Yadav 4 years, 3 months ago

Let the init vector be r^ r^=(+-)4i^+3j^+6k^/magnitude of given vector r^=+-[4i^/root61+3j^/root61+6k^/root61]

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Differentiate 1/(x)^1/2

Posted by Anusha Shandilya 4 years, 3 months ago

CBSE > Class 11 > Physics

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What is parallax method??

Posted by Anshika Seth 4 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 4 years, 3 months ago

Parallax is the displacement or the change in the apparent position of the object when viewed from two different points of view. The two points of view have their own line of sights and parallax is measured as half of the angle between the two lines of sights.

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Least count error definition

Posted by Lokender Singh 4 years, 3 months ago

CBSE > Class 11 > Physics

2 answers

Ankit Mukherjee 4 years, 3 months ago

Fztrtziryzr

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Anshika Seth 4 years, 3 months ago

The least count error is the error associated with the resolution of the instrument

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Define Unification and Reduction

Posted by Shashwat Singh 4 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Tripti Tiwari 4 years, 3 months ago

Unification : Attempt to explain various phenomenons through few laws. Eg:free fall of apples,motion of satellites around planets Explained by universal law of gravitation and second law of thermodynamics Reductionism: To study a large system, to study properties of constituent particles.It helps in future advancement. Eg:generator:armature coil, magnets, slip rings.

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Pick out the constant quantity

Posted by Meer Yamin 4 years, 4 months ago

CBSE > Class 11 > Physics

3 answers

Adithya Dev A 4 years, 3 months ago

Any options?

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Meer Yamin 4 years, 4 months ago

Pickout the constant quentity

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Meer Yamin 4 years, 4 months ago

Pickout the constant quantity

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ultrasonics sent by a SONAR return back to it after reflection from a rock under water after a time lapse of 2.2s. if the velocity of ultrasonics in water is 1,450 ms-1, find the depth of the rock below the water surfaces.

Posted by Sakshi Mehra 4 years, 4 months ago

CBSE > Class 11 > Physics

2 answers

Adithya Dev A 4 years, 4 months ago

I mean 1595.0 metres.

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Adithya Dev A 4 years, 4 months ago

t = 2.2 s. V = 1450 m/s. Therefore, 2d = V * t. Depth = 1450 * 2.2/2 = 1450 * 11 = 15950 metres//

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I am choosed stream of non medical in 11 so please physics,punjabi ,welcome life,enovorment studies guides issue this app

Posted by Arshdeep Kaur Romana 4 years, 4 months ago

CBSE > Class 11 > Physics

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What is differential calculus

Posted by Ashitha Biswas 4 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 4 years, 3 months ago

a branch of mathematics concerned with the determination, properties, and application of derivatives and differentials.

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Can anyone teach me the parallax method?

Posted by Haadil Nithin 4 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Anshika Seth 4 years, 3 months ago

Parallax is the displacement or the change in the apparent position of the object when viewed from two different points of view

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What should be the properties of a standard unit

Posted by Lavisha Mahajan 4 years, 4 months ago

CBSE > Class 11 > Physics

2 answers

Omprakash Rath 4 years, 4 months ago

Characteristics of standard unit: It should be of convenient size. It should not change with respect to place and time. It should be well defined. It should be easily reproduced.

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Sia ? 4 years, 4 months ago

1. standard units should be easily understable.
2. standard units should not change with place or time
3. standard units should be in accordance with the size of the quality to be measured .
4. standard units should be changed with change in physical factors.

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What are ray diagrams of lens in representation ?

Posted by Poonam Mittewad 4 years, 4 months ago

CBSE > Class 11 > Physics

2 answers

Poonam Mittewad 4 years, 4 months ago

Thanks

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Priyanshu Kalondia 4 years, 4 months ago

Ray diagrams are the representation of light rays before and after passing thought lens.

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1.If the net electric flux through a closed surface is zero, then we can infer (a) no net charge is enclosed by the surface. (b) uniform electric field exists within the surface. (c) electric potential varies from point to point inside the surface. (d) charge is present inside the surface.

Posted by Satish Bhardwaj 4 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 4 years, 4 months ago

As we know according to gauss law. Flux coming from a closed surface of area A is Proportional to charge enclosed by the surface given as. So net flux can be zero only if net charge enclosed by the surface is zero or Electric field is perpendicular to the surface area.

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Difference between electric potential and electrostatic potential

Posted by Bhupesh Yadav 4 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 4 years, 4 months ago

The is no difference between electrostatic potential energy and electric(al) potential energy. The electric potential at a point is the work done by an external force in moving unit positive charge from an arbitrarily chosen zero of potential (often infinity) to the point.

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A bus is travelling the first one-third distance at a speed of 10km/h, the next one-fourth at 20km/h and the remaining at 40km/h. What is the average speed of the bus?

Posted by Anudhka Rai 4 years, 4 months ago

CBSE > Class 11 > Physics

2 answers

Sia ? 4 years, 4 months ago

It covered =
x/3 at 10
x/3 at 20
x/3 at 60
Times taken respectively are {d/t}
x / 30
x / 60
x / 180 respectively
total time = x/30 + x /60 + x/180
= 10x / 180
= x / 18
Average speed of bus (avg speed)
= total distance / total time
avg speed = x / {x/18}
So, average speed = 18 km / h

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Rajinder Saharan 4 years, 4 months ago

It covered = x/3 at 10 x/3 at 20 x/3 at 60 Times taken respectively are {d/t} x / 30 x / 60 x / 180 respectively total time = x/30 + x /60 + x/180 = 10x / 180 = x / 18 Average speed of bus (avg speed) = total distance / total time avg speed = x / {x/18} So, average speed = 18 km / h

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One nanometre is equal to how much

Posted by G Bhavani 4 years, 4 months ago

CBSE > Class 11 > Physics

5 answers

Satish Bhardwaj 4 years, 4 months ago

10^-9 m

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J.Ramya Devi 4 years, 4 months ago

10^-9m

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Akshat Goel 4 years, 4 months ago

10^-9 m

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Shubham Jangid 4 years, 4 months ago

10 raise to power -9 m

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G Bhavani 4 years, 4 months ago

10^-9 m

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What are Derivatives

Posted by Khüshí Thåkrâñ 4 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 4 years, 4 months ago

In finance, a derivative is a contract that derives its value from the performance of an underlying entity. This underlying entity can be an asset, index, or interest rate, and is often simply called the "underlying".

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Can anyone tell me why do we refer to heat capacity and specific heat capacity...?

Posted by Drishty Kamboj 4 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 4 years, 4 months ago

Thermodynamics in its totality is concerned about heat. The meaning of heat today is energy in transit. Before the development of thermodynamic laws, the heat was considered as the measure of an invisible fluid, caloric, present in any matter. The capability of a substance to hold this fluid was then referred to as the heat capacity of that substance. The development in thermodynamics and dependence of heat transfer on temperature changed the definition of heat.

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Which are the important books for class 11th PCB stream...??

Posted by Aayush Roy 4 years, 4 months ago

CBSE > Class 11 > Physics