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now net resistance = 1+ 1/1 + 1 = 1+1+1= 3 ohm

A polar molecule has a netdipoleas a result of the opposing charges (i.e. having partial positive and partial negative charges) from polar bonds arranged asymmetrically.Water(H2O) is an example of a polar molecule since it has a slight positive charge on one side and a slight negative charge on the other.

A molecule may be nonpolar either when there is an equal sharing of electrons between the two atoms of a diatomic molecule or because of the symmetrical arrangement of polar bonds in a more complex molecule. For example,boron trifluoride(BF3) has a trigonal planar arrangement of three polar bonds at 120°.

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As green house protects the plants to inside it from the climatic conditions outside and gives it suitable temperature for growth...that is why farmers do so.Through this they get many advantages....they have bountiful crops and their crops are also protected from birds and animals

Farmersget many advantage like thecrops growwell..it also protect it from high blowing wind,and rodents.. Asgreen houseprotects the plants to inside it from the climatic conditions outside and gives it suitable temperature forgrowth...thatiswhyfarmers doso.

A large greenhouse protect the plants to inside it from the climate conditions and gives it suitable temperature for the growth so that the farmer do this method. By the help of this method, they get many advantages are:1. They have good and pure crops.2. Their crops are protected from birds and animals.

Separating immiscible liquidsis done simply using aseparatingfunnel. Thetwo liquidsare put into the funnel and are left for a short time to settle out and formtwolayers. The tap of the funnel is opened and the bottomliquidis allowed to run. Thetwo liquidsare nowseparate.

grass trees plants etc

1. Any metal when heated expand.2. Plastic expand on heating as its particles get disassociate.

The Indian society comprised of various social evils, malpractices and prejudices since the beginning of the ages.

Some of them that were prevalent in the 19th century are discussed below:

• System of giving dowry to the groom’s family by the bride’s family

• Sati or immolation of the wife after the death of her husband in the same pyre with the husband

• Child marriage

• Female infanticide

• Disapproval of re-marriage of windows and so on

■DDT(dichlorodiphenyltrichloroethane)

■Hexachlorobenzene(HCB)

■PCBs(polychlorinated biphenyls)

■Toxaphene

■Monomethylmercury.

option B is the correct answer

using right hand curl rule.. upon curling the a the fingers the direction of thumb gives the direction of magnetic field.

so, magnetic field is upward for B, which is correct.

To make the block move you need to apply force aboveùmgwhere u is 0.8So the minimum force comes out to be = 31.36 NewtonSo if u apply 30 Newton the ground will apply 30 NEWTON!

when o say if u can do the question numerically then solve

First magnetic induction B = flux / area is to be found out. B = 4 x 10^-4/4 x 10-4= 1 TNow permeability μ = B / HGiven H = 1000 A/m, and found B = 1TSo μ = 1/1000 = 10-³H/m

relative permeability is μ/μo = 10^-3/4π*10^-7 = 796.17Now with susceptibility chi we have to follow μ/μo = 1 + chiμo = 4 pi x 10-7

=> chi = 10^-3/4π*10^-7 -1 = 796.17-1 = 795.17

NH 44covers the North-South Corridor of NHDP and it is officially listed as running over 3,745 km (2,327 mi) from Srinagar toKanyakumari. It is the longest national highway in India

Thisbending toward lightis called phototropism.

In order for us to see anobjectthat isnon-luminous, it must reflect some of the light it receives from aluminoussource, such as the Sun. Most of theobjectswe see, such as cars, clouds or even the Moon, are notluminous; it is just that they reflect sunlight.

Maximum magnetic field is present in part A and C Minimum magnetic field is present in region B this is because the part A and C are magnetic poles so that these parts have maximum number of magnetic field lines which determine the intensity of magnetic field and B is the center of the magnet which has no magnetic field lines. Therefore intensity of magnetic field near B is almost 0

i) Maximum magnetic field is in the region A and C.

(ii) Minimum magnetic field is in the region B. This is because A and C are magnetic poles and have maximum number of magnetic field lines which determine the intensity of magnetic field while B is centre of the magnet that has no magnetic field lines. So intensity of magnetic field near B is almost zero.

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surface energy is = work done per unit area = W/A

please soecify the question clearly

An operational amplifier is a DC-coupled high-gain electronic voltage amplifier with a differential input and, usually, a single-ended output.

option 4 is correct

if the force acts parallel to the direction of movement , the acceleration provided will be in the same direction..so it will follow straight line

and if the force is not parallel.. then it will be combined movement of curve+ linear, so parabola

We know thatR= pl/A= 8nowR is proportional to l/AnowR= p(l/2)/2A

= R= p(0.5l)/2A= 8*0.5/2= 40/20= 2 ohm

W=T×ΔA=5×2×(0.02)

(Film has two free surfaces)

=2×10−1J

The answer to option C is 2×10^-1 J . The option provided is wrong.

Resistance = p l/a [ p is constant]For first wire length = l and area of croos section = aResistance = p l/a = 8 ohm [given]

For second wire length = l/2 and area of cross section = 2aResistance = p (l/2) / 2a = p l/4a = p l/a * 1/4 [p l/a = 8 ohm] = 8*1/4 = 2 ohm

The resistance of second wire = 2 ohm

We know that the resistance is P(rho) l/a. We can ignore P over here because the material is same in both cases. Now, R=l/a. 8=l/a. In the second case, they are asking resistance if the area is double and length is halved. So, R=l/2 whole divided by 2a.We get R=l/4a. But we l/a=4. So, 4/4=1 and so the answer is 1 ohm.

resistance is R = ρl/a

so , here ρ = 5*10^-8 and l = 50 , and a = 0.01mm² = 0.01*10⁻⁶ m²

so, R = (5*10^-8)*50/0.01*10^⁻⁶R = 250 Ω

C. 120 mm

Explaination : systolic blood pressure, measures the pressure in our blood vessels when heart beats.

B. 25 cm

Explaination : Theleastdistance ofvisionfor anormalyoung eye is 25 cm. Theleastdistance of distinct visionis theminimumdistance of an object to see clear and distinct image.

The main and most important postulates of Bohr’s theory :

Postulates of Bohr's theory of hydrogen atom

1. NUCLEAR CONCEPT :An atom consists of a small and massive central core, called nucleus around which planetary electrons revolve. The centripetal force required for their rotation is provided by the electrostatic attraction between the electrons and the nucleus.

2. QUANTUM CONDITION :Of all the possible circular orbits allowed by the classical theory, the electrons are permitted to circulate only in those orbits in which the angular momentum of an election is an integral multiple of h/2 pye, h being Planks constant. Therefore, for any permitted orbit,

L=mvr =nh/2PYE, n=1,2,3……

WheWhere L, m, and v are the angular momentum, mass and speed of the electron, r is the radius of the permitted orbit and n is positive integer called principal quantum no. The above equation is Bohr’s famous quantum condition.