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A magnetic field is a vector field that describes the magnetic influence of electrical currents

The electrostatic potential at any point in an electric field is equal to the amount of work done.

An electric potential is the amount of work needed to move a unit of charge from a reference point to a specific point inside the field without producing an acceleration. Typically, the reference point is the Earth or a point at infinity, although any point can be used.

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30 m/s , 30×1 30, 30×6 180, 240÷30 8s

Astronaut is the people who travel into space

people who travel to space is astronaut

Inphysics, specificallyelectromagnetism, themagnetic flux(often denotedΦorΦB) through a surface is the surfaceintegralof the normal component of themagnetic fieldBpassing through that surface. TheSIunitof magnetic flux is theweber(Wb) and theCGSunit is themaxwell.

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Unit of magnetic flux is weber.Please hit the like button if this helped you

We know that

m= h'/h= -v/u

5/10=-30/u

u=-300/5

u=-60cm

1/f=1/v+1/u

1/f = 1/-30 + 1/-60

1/f = -2-1/60

1/f=-3/60

1/f=-1/20

f=-20cm

Therefore the focal length of the concave mirror is 20 cm front of the mirror

Electrostatic force is the force that exists between electrically charged particles or objects at rest. Examples of electrostatic forces: When we run a piece of paper with the oil in our head with the help of a comb produces electrostatic force.

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it is force between charged body to an uncharged body

Elecroastic is a type of force where like pole repels each other and unlike pole attract each other.

Electrostatic forces are attractive or repulsiveforcesbetween particles that are caused by their electric charges. This force is also called the Coulomb force or Coulomb interaction and is so named for French physicist Charles-Augustin de Coulomb, who described the force in 1795.

The branch of physic which deals electro means electric field and statics means rest is caller electrostatics force

Electrostatic force are attractive or repulsive forces between particle that are caused by their electric charges. This force is also called the Coulomb force or Coulomb interaction and is so named for French physicist Charles -Augustin de Coulomb, who described the force in 1795.

option D is correct , as magnetic flux is ∅ = B•ds = |B||ds|cos∅ .

A magnetic field is a picture that we use as a tool to describe how themagnetic forceis distributed in the space around and within something magnetic.

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Concave lenses are thinner at the middle. Rays of light that pass through the lens are spread out (they diverge). A concave lens is a diverging lens. When parallel rays of light pass through a concave lens the refracted rays diverge so that they appear to come from one point called the principal focus.

Therefore, statement "A concave lens is a converging lens" is false.

since B = 0.02i T that is i direction.

so only i direction of area vectors will have flux

so flux = B.A = 0.02T×30cm² = 60μWb option A.

Violet.

It will be maximum for photons having maximum energy. Violet color photon has minimum wavelength and maximum energy therefore stopping potential will be maximum for it.

It will be maximum for photons having maximum energy.

Violet color photon has minimum wavelength and maximum energy therefore stopping potential will be maximum for it.

When it is connected by wire, all charge from inside is conducted to the outer shell.And then potential inside the shell is a constant and equal to the potential at the surface i.e kQ/bkQ/a = V So, Q = Va/KSo, New Potential = k(Va/k)/b = Va/b

Magnetic Pole Strength is the measurement of the force that a pole of a magnet exerts when another pole (similar or dissimilar) of another magnet is brought near to it.

It has got SI unit of- A m (Ampere-Meter)

a point 8 ohm and 4 ohm

right answer is option (a)

27.9. and

180. 8

Range = Vx.T and T = 2Vy/g so, Range = 2Vx.Vy/g

and maximum height = H = Vy²/2g

now, R = 2H => 2Vx.Vy/g = 2*(Vy²/2g)=> Vx.Vy = 1/2*(Vy.Vy)=> Vy = 2Vx

option 2

Radius of ground state of hydrogen atom = 0.53 A° = 0.53*10^-10 m

According to de Broglie relation 2pi*r = n*λ

For ground state n = 1Then,2*3.14*0.53*10^-10 = 1*λ

Therefore, λ = 3.32*10^-10 m= 3.35 A°

IftheEarthstopped spinning suddenly, the atmospherewouldstill be in motion with theEarth'soriginal 1100 mile per hourrotationspeed at the equator. All of the land masseswouldbe scoured clean of anything not attached to bedrock.

Avg velocity =Vavg = S/tTotal distance = S = S1 + S2or V1 x t/3 + V2 x 2t/3

so,

Vavg =V1 x t/3 + V2 x 2t/3 /t

=V1 + 2V2/3

Well, if mass is doubled, K. E is doubled

So now K.E1=2K.E

When velocity is halved, K.E becomes 1/4th of initial value

K.E 2 = K.E1 /4

=2*K.E/4

=K.E/2 =0.5E

so, kinetic energy is halved after the changes

Let u be the velocity with which it was projectedK = 0.5mu²490 J = 0.5 × 5 kg × u²u² = 196 J/kg

Let v be the velocity at the point where it’s kinetic energy becomes half is490/2 = 0.5 mv²490 Joule = 5 kg × v²v² = 98 Joule/kg

Now, use equation of motion v² - u² = 2aSh = [(98 - 196) J/kg] / (2 × -9.8 m/s²) = 5 m

K.E will become half at height of 5 m

Here initial momentum is M*V,

and final momentum , whem mass m is at rest will be m*0 + (M-m)*v' ( v' is needed to be found out..)

so, conserving the momentum ,

MV = (M-m)v'

=> v' = MV/(M-m)

option A

A = v÷ t T = v ÷ a T = 96 ÷ 32 T = 3 sec

सॉरी sorry bro i think you are right but ans is b

2F=m.a 2F=12×22F=24F=24÷2F=12 N. that's answer.

distance= circumference of circle= 2πr= 2(22/7)(21)m=22×6m=132mdisplacement=0

International year of physics-2005

Biomass is waste material from plants or animals that is not used for food or feed; it can be waste from farming (like wheat stalks) or horticulture (yard waste), food processing (like corn cobs), animal farming (manure rich in nitrogen and phosphorus), or human waste from sewage plants.

2)Tidal power or tidal energy is a form of hydropower that converts the energy obtained from tides into useful forms of power, mainly electricity. Although not yet widely used, tidal energy has potential for future electricity generation. Tides are more predictable than the wind and the sun

3)All combustion process give out heat energy.Fuelsare burnt to provide us with energy. However, not every chemical substance that burns is agood fuel. For agood fuel, it must gives out a lot of heat energy to the surroundin

Yes they represent period and periodic isLCM of (2π/w,2π/2w,2π/4w)=2π/2w=π/whence period is pi/w