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In electromagnetism, charge density is a measure of the amount of electric charge per unit length, surface area, or volume

but madam where is expression

'Sensitive components like electronic devices can be protected from external field by placing metal shields around them (Electrostatic shielding)

place it in a conductor since net field is zero inside it

It shows that the electric field intensity at any point on the plane sheet is not depend on the distance of the point from the plane

thnkx priyanka

Coulomb's law is: The magnitude of the electric force between to point charges is proportional to the magnitude of the charges, and inversely proportional to the distance between them.

Every charged object emits anelectric field. This electric field is the origin of the electric force that other charged particles experience. The electric field of a charge exists everywhere, but its strength decreases with distance squared.

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how did 43 came solve that portion mine is coming 54 please solve that and send me

4. option C5. option D 6. option B

Answers4-C5-D6-B(changes every yearl

There are three types of inertia:1. inertia of rest: this is the resistance offered by the body to remain in rest unless an external force is not applied on the body. eg.:if a carpet is beaten with a stick then the dust particles due to inertia of rest tends to remain in rest while the fibers of carpet becomes in motion.2. inertia of direction: this is the resistance offered by the body to change its direction unless an ext.force is not applied on the body.Eg:if a bus tkes a turn then passengers sitting in tends to remain in the same direction in which the bus was travelling before.3. inertia of motion: the resistance offerd by the body to change its uniform motion.Eg:if a bus stops suddenly then the passengers fall forward due to inertia of motion.

The fundamental units are the units of the fundamental quantities, as defined by the International System of Units. They are not dependent upon any other units, and all other units are derived from them. In the International System of Units, the fundamental units are:

The meter (symbol: m), used to measure length.

The kilogram (symbol: kg), used to measure mass.

The second (symbol: s), used to measure time.

The ampere (symbol: A), used to measure electric current.

The kelvin (symbol: K), used to measure temperature.

The mole (symbol: mol), used to measure amount of substance.

The candela (symbol: cd), used to measure light intensity.

In general, awaterwitha pH< 7 is considered acidic and witha pH> 7 is considered basic. The normal rangefor pHin surfacewatersystems is 6.5 to 8.5 and for groundwater systems 6 to 8.5. Alkalinity is ameasure of thecapacityof the waterto resists a change inpHthatwouldtend to make thewatermore acidic.

ph scale is used to measure ph value

Thetheorem of parallel axesstates that the moment of inertia of a rigid body about anyaxisis equal to its moment of inertia about aparallel axisthrough its centre of mass plus the product of the mass of the body and the square of theperpendiculardistance between the twoparallel axes.

Ans :- This theoremis applicable only to the planar bodies. Bodies which are flat with very less or negligible thickness. This theorem states that the moment of inertia of a planar body about an axis perpendicular to its planeis equal to the sum of its moments of inertiaabout two perpendicular axes concurrentwith the perpendicular axis and lying in the plane of the body

IZ =Ix+ Iy

Parallel Axis Theorem

Parallel axis theorem is applicable to bodies of any shape. The theorem of parallel axis states that the moment of inertia of a body about an axis parallel to an axis passing through the centre of mass is equal to the sum of the moment of inertia of body about an axis passing through centre of mass and product of mass and square of the distance between the two axes.

IZ’= Iz+ Mα²

Perpendicular Axis Theorem. For aplanarobject, the moment of inertia about an axis perpendicular to the plane is the sum of the moments of inertia of two perpendicular axes through thesamepoint in the plane of the object.

since magnetic moment are also vectors

so, Mresultant = √(M²+M²+2MMcos60) = √3M² = √3M

thanks

s = 5t i + 6t² j - 10k

ds/dt = v = 5 i + 12t j - 0 k

dv/dt = 12j

at t = 1

v = 5 i + 12 j - 0 k

a = 12 j

Like my answer if you find it useful!

welldone

For transmission line AD- BC = 1whereA B and C D are parameters

Question you have submitted is incomplete. Please post a complete question.

Velocity = dispacement / timeSpeed = distance / time

a) when he jogs from A to B on a straight road,displacement = distance = 300mtime = 2 minutes 30 seconds = 150 s

velocity = 300/150 = 2 m/sspeed = 300/150 = 2m/s

b)when he jogs from A to B and turns back to C,displacement = 300-100 = 200mdistance = 300+100 = 400mtime = 3 minute 30 second = 210 s

velocity = 200/210 = 20/21 m/sspeed = 400/210 = 40/21 m/s

In relativity theory, Einstein introduced mass as a new type of energy to the mix. Beforehand, the mass of something in kilograms was just a measure of how much stuff was present and how resistant it was to being moved around. In Einstein's new world, mass became a way to measure the total energy present in an object, even when it was not being heated, moved or irradiated or whatever else. Mass is just a super-concentrated form of energy and, moreover, these things can turn from one form to the other and back again. Nuclear power stations exploit this idea inside their reactors where subatomic particles, called neutrons, are fired at the nuclei of uranium atoms, which causes the uranium to split into smaller atoms. The process of fission releases energy and further neutrons that can go on to split more uranium atoms. If you made very precise measurements of all the particles before and after the process, you would find that the total mass of the latter was very slightly smaller than the former, a difference known as the "mass defect". That missing matter has been converted to energy and you can calculate how much using Einstein's equation.

what will be answer

find the angle

Mean a is 8 and b is 6By adding them ans is 14 while subtracting ans is 2

So use pathagorous theorem to find resultant at perpendicular. .

R = √ (8)² + (6)²R = √ 64+36R = √ 100R = 10

tq

how do you get this? please explain in detail

Thanks

Let two forces F₁ and F₂ are givenA/C to question, |F₁| = 2|F₂|Resultant of two forces F₁ and F₂ are given by R = F₁ + F₂

A/C to question, R is perpendicular upon smaller force.Here smaller force is F₂.So, R.F₂ = 0⇒(F₁ + F₂).F₂ = 0⇒F₁.F₂ + F₂² = 0 ⇒|F₁||F₂|cosФ + |F₂|² = 0 Now, put |F₁| = 2|F₂| ⇒2|F₂|.|F₂|cosФ + |F₂|² = 0⇒2cosФ + 1 = 0 ⇒cosФ = -1/2 = cos120°

Hence, angle between two forces is 120°

4)

Let x be the force recorded by dynamometer.

Both masses move in one direction.

The largest force is 20N and the least is 10 N.

This means x lies between 10 and 20.

This can be represented as shown.

10 < x < 20

The resultant force on :

6kg mass = 20 - x

4 kg mass = x - 10

They have equal acceleration as shown :

(20 - x) / 6 = (x - 10) / 4

4(20 - x) = 6( x - 10)

80 - 4x = 6x - 60

140 = 10x

x = 14 N

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Option d). because unknown value of frictional force.

If the particle is in equilibrium , then net forces in horizontal and vertical direction should be 0

so, in vertical direction

4cos45° + F2cos∅ = 10=> F2cos∅ = 10 -2√2 .... (1)

in horz direction4sin(45°) = F2sin∅ ....(2)=> F2sin∅ = 2√2

now so, dividing 2 with 1

=> sin∅/cos∅ = 2√2/(10-2√2) => tan∅ = 2√2/(10-2√2)

now, squaring and adding 1 and 2

F2²sin²∅ +F2²cos²∅ = 8+8+100 -40√2 => F2² = 116-40√2=> F2 = √(116-40√2) N

given X = t²+2t

so, x' = v = 2t+2

and hence acceleration = x" = 2 m/s²

so, force will be m*a = 0.5*2 = 1N

now displacement at (t=2sec) is = (2)²+(2*2) = 8m

so, w = F.ds = 1*8 = 8J

The process in which heavy nucleus is broken into tiny nuclei, is called as nuclear fission. On the other extreme, nuclear fusion is defined as the reaction wherein lighter atoms come together and form a heavy nucleus.

I don't know I don't know I don't know

Kinetic energy decreases as the ball goes up as the ball is facing negative acceleration so its speed reduces and hence the kinetic energy. The potential energy increases as the height increases.Therefore option A