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option 3 is the answer.A resistance wire is introduced in gap S and the resistance box is in gap R. One end of the galvanometer is connected to terminal D and its other end is connected to a jockey. As the jockey slides over the wire AC, it shows zero deflection at the balancingpoint(null point).

but the answer given is, A is the correct option.

metre bridge is not suitable for both very high/low resistances..and the reason is as follows…

If we measure too high resistance and the meter deflection is too small, ie, currents are too low.

Similarly

For Too low and you get errors due to the resistance of the wire and the connections.

unit of k1 = 1/x = 1/meter = metre-¹unit of k2 = 1/t = s-¹

option 2

I can't understand

In order to classify materials as magnetic or non-magnetic, it must be determined whether or not forces act on the material when a material is placed in a magnetic field. If a bar of any given material is suspended in a magnetic field, it will either turn at a right angle to the field or align with the field.magnetic field. If a bar of any given material is suspended in a magnetic field, it will either turn at a right angle to the field or align with the field.

Diamagnetic Material

A material that turns at a right angle to the field by producing a magnetic response opposite to the applied field is called diamagnetic material such as silver, copper, and carbon have permeability’s slightly less than free space (for copper, μr= 0.9999980).

Paramagnetic Material

A material aligning itself with the applied field is called paramagnetic material. Paramagnetic materials such as aluminum and air have permeability’s slightly greater than that of free space (for air μr=1.0000004). The effects of diamagnetic and paramagnetic are negligibly small so that materials possessing these weak phenomena are said to be non-magnetic

Ferromagnetic Material

Within the paramagnetic class of materials, is a special classification of materials called ferromagnetic material. These materials are strongly attracted to magnets and exhibit Paramagnetism to a phenomenal degree. Ferromagnetic materials such as iron, steel, cobalt and their alloys have relative permeability’s extending into the hundreds and thousands, are said to be magnetic.

The magnetic properties of matter are associated with the spinning motion of electrons in the third shell of the atomic structure.

this right answer 4

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no response to following questions

Magnification, m = – v/u

Mirror formula is 1/f = 1/v+ 1/u

or, 1/v = 1/f– 1/u

or, v = uf / (u -f)

Therefore, m = v/u = f / u -f

Isotopes of an element have the same physical properties.

option (a) is correct.

all living phenomena occur due to interactions

force (F) = 6piRkV (V is terminal velocity)Fi/Ff= (Ri/Rf).(Vi/Vf) ..........1 (i , f denotes initial & final)F = vg(p - pw) (v is volume)F1/F2= v1/v2 (v = 4/3 piR3)F1/F2= (Ri/Rf)2 ...............2equating 1 & 2(Ri/Rf)2= (Vi/Vf)final radius is double soVi/Vf= 1/4Vf= 4V

thanks

option option B is the correct answer

As we know density is equal to mass by volume.

mass of copper piece = 44 g

ER. RAVI KUMAR ROY

now volume of copper is equal to water raised in the tube = 17 - 12 = 5 ml

so density = 44/5 g/cm^3 (ANS)

One joule is defined as the amount of energy exerted when a force of one newton is applied over a displacement of one meter. One joule is the equivalent of one watt of power radiated or dissipated for one second. In some applications, the British thermal unit (Btu) is used to express energy.

thank you

We know that,

Q = AV

But A = πr^2

So, V = Q/πr^2

Force = pAV^2 , p = density of water

Force = p(AV)V

We know AV = Q and V = Q/πr^2

So, Force = p x Q x Q/πr^2

Since , length is not negligible here,Force = pQ^2l/ πr^2

solid=tube lisididiskdkdkjdjsjsksificidieisodifo

 = direction vector of vector A= 3î + 2ĵ + 4k̂

so, direction vector is 3î + 2ĵ + 4k̂ /(√3²+2²+4²) = 3î + 2ĵ + 4k̂/(√29)

we can pull and pushwe can run and many more things can be done

we can endure any physical activity like push or pull in many situation like opening or closing the door or tug war...... catching a moving ball or throwing ball..... striking a football or stopping it etc.........u can also give the example of your daily work like walking running or writing through pen

I know but iupac

BitumenPenetrationGrade 80/100is a standard penetrationgrade Bitumenusually used as a PavingGrade Bitumensuitable for road construction and for the production of asphalt pavements with superior properties·If grade of bitumen is 80/100 then penetration value lies between 8 to 10 mm.

dolor bhiVikdK civil is

A. Acid

Explaination : Blue litmus paper turns red under acidic conditions

Thanks

i). R-OH ii). R-O-R'iii). R-COO-R'iv) R-NH2

प्रकाश संश्लेषण एक ऐसी प्रक्रिया है जिसमें पौधे सूर्य के प्रकाश की मौजूदगी में अपने पत्तों और हरे भागो में मौजूद क्लोरोफिल की सहायता से पानी और कार्बनडाइऑक्साइड को संश्लेषित करके अपने भोजन को तैयार करते है

778×345×421 संख्या में इकाई का अंक ज्ञात करो

The answer is 3.632×10power-3m

the answer is 3.632×10 ^3m

Use R = pl/AA= π(d/2)^2l = lengthp = specific resistance

the answer is 3.632×10^3m

the right answer is 3.632×10^3m

the right answer is 3.632×10 power-3m