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The potential difference (voltage) across an ideal conductor is proportional to the current through it. The constant of proportionality is called the "resistance", R.Ohm's Lawis given by: V = I R where V is the potential difference between two points which include a resistance R.

Pascal’s principle, also calledPascal’s law, influid (gas or liquid) mechanics, statement that, in a fluid at rest in a closed container, apressurechange in one part is transmitted without loss to every portion of the fluid and to the walls of the container.

Explanation:Pressure is equal to theforcedivided by the area on which it acts. According to Pascal’s principle, in ahydraulicsystem a pressure exerted on apistonproduces an equal increase in pressure on another piston in the system. If the second piston has an area 10 times that of the first, the force on the second piston is 10 times greater, though the pressure is the same as that on the first piston. This effect is exemplified by thehydraulic press, based on Pascal’s principle, which is used in such applications as hydraulic brakes.

A black body or blackbody is an idealized physical body that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence

answer for the question is (d)

c) is the correct answer

C) is the correct answer

Conservation of energy dictates that the sum of potential and kinetic energy is constant, thus, when one is at a maximum, the other is at a minimum.

Maximum velocity occurs where we have maximum kinetic energy, which occurs where we have minimum potential energy, which is the equilibrium point in the middle.

Acceleration is zero because at that point, it is the mean position, which means it is the equilibrium position. Hence, the spring is not compressed (or extended) or the pendulum suffers no tangential force.

However, at that point, due to velocity being non-zero, the object crosses the mean position (law of intertia), and the acceleration again becomes non zero! This process continues and SHM takes place.

It is not that velocity is maximum, that's why the acceleration is zero. The velocity is maximum there because acceleration changes direction at that point, hence at all other points, the acceleration is decelerating the object.

InSimple Harmonic Motion,maximumspeedoccursat x = 0 (the equilibrium level or position), and speed is zero at the extreme ends ( x = +/- A )." Of course, if we use the word "Velocity", the respective direction(s) must be determined.Accelerationhas a different story. At the middle (x = 0),accelerationis zero.

Y = 3sin( 36t + 0.018x + π/4) Compare this equation with Y = Asin( wt + Kx + ∅) A = 3 cm w = 36 K = 0.018 ∅ = π/4

Speed of wave (V) = w/K = 36 /0.018 = 2000 cm/s = 20 m/s Frequency ( f) = w/2π = 36/2π = 5.73 Hz

Amplitude , A = 3 cm

Phase angle ( ∅) = π/4

Wavelength = 2π/K = 2π/0.018 = 348.88 cm = 3.4888 m = 3.49 m

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It will be 90°as current leads the Voltage by 90 °

voltage(v) lag by 90 degrees in an AC circuit containing only Capacitor behind the current(I).

The current in an A.C circuit is called wattless current, if the average power consumed in the circuit is 0.

The average power will be 0 in two cases:

Purely Inductive Circuit ( Because in Inductive circuit, voltage leads the current by π/2, thus Cos θ=0)

Purely Capacitive Circuit(Because in Capacitive circuit, current leads the voltage by π/2, this Cos θ=0)

No power is dissipated even though a current in flowing in the circuit.This current is called Wattless current/Idle Current.

Correct option: 3. Reason: The phase difference between the displacement and acceleration in SHM is π.

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Let the speed of mass M be v .The point on thread just connected to mass M will also have the same velocity .The component of the v along the thread is v cos θ . That means any point on the thread must be moving with speed v cos θ .As it is given that thread is moving with velocity u .That meansv cos θ = u=>v= u/ cos θ

option (4) is correct.

Resistance of a conductor is defined as the opposition to the flow of electrical current through a conductor. R = V/I. Its SI unit is Ohm.

The SI unit of electric current is the ampere, which is the flow of electric charge across a surface at the rate of one coulomb per second. Electric current is measured using a device called an ammeter.

(d) is correct option

Voltage = current * resistancePower = (current) ^2 *resistancePower = (voltage) ^2 /resistanceresistance = 12*12/20 = 7.2 ohms

The Brainliest Answer! Oneelectronpossesses a charge of 1.6 ×10-19C, i.e., 1.6 ×10-19C of charge is contained in1 electron. Therefore, 6 x 1018electronsconstitute onecoulombof charge.

We know that the a electron have charge of 1.6 × 10−19C

∴e=1.6 × 10−19C

Total charge required 1Coulomb.

∴q= 1C

Sinceq =ne

⇒ n =q/e

⇒n =1/1.6 × 10^-19

⇒6.25×10^18

⇒6×10^18electrons.

charge on electron = 1.6×10^-19 coulumb.in one electron.6×1018 electron form 1 coulomb charge.

6.25 ×10^18this is the answer for ur question

Phosphor bronze is used for suspension in moving coil galvanometer because it has low torsional constant. Also it is non magnetic and does not oxidise easily.

the wire used for suspension of coil in moving coil galvanometer is made up of phosphor bronze because there constant value K is quite less.it is highly sensitive.and restoring torque is dependent on these phosphor bronze wire.

The main objective of populations education is to educate the people about the population situation ideal for the family for the community and for the country. Population education motivates the people to have small families it gives the message of a small family and informs the people about pre-natal care and child welfare. Population education provides knowledge of the advantage of small family.

John Dalton, an English chemist, meteorologist and physicist, began a series of experiments which made him propose the theory of atomic compositions, which are known as Dalton’s Atomic Theory. This theory is one of the cornerstones of modern physics and chemistry.

According to Dalton's Atomic Theory

1) All matter is made of atoms. Atoms are indivisible and indestructible.

2) All atoms of a given element are identical in mass and properties

3) Compounds are formed by a combination of two or more different kinds of atoms.

4) A chemical reaction is arearrangement of atoms.

However, the modern atomic theory is a little more involved than Dalton's theory but the essence of Dalton's theory remains valid.

The 4 postulates of Bohr's atomic model are:-

1) Electrons assume only certain orbits around the nucleus. These orbits are stable and called "stationary" orbits.

2)Each orbit has an energy associated with it. For example, the orbit closest to the nucleus has an energy E1, the next closest E2 and so on.

3)Light isemittedwhen an electron jumps from a higher orbit to a lower orbit andabsorbed when it jumps from a lower to the higher orbit.

4)The energy and frequency of light emitted or absorbed is given by the difference between the two orbit energies, e.g,E (light) = Ef - Ein= E(light)/hh = Planck's constant = 6.627 x 10⁻³⁴Jswhere "f" and "i" represent final and initial.

Sound speed varies with air temperature. The temperatures of air will be either low or high.

Case 1 :— When air temperature is low.

As the temperature of air decreases, the air molecules become more and more rigid. The vibrating capacity of the molecules reduces. Sound is a series of waves which vibrate the molecules to transmit the energy.

As the temperature is low, the molecules vibrate lesser and lesser. Due to less vibrations, the energy takes a longer period of time to get transmitted.

So, the speed of sound is low at lower temperatures.

Case 2 :— When temperature of air is high.

The converse of the above situation is also true. The air molecules vibrate more and more due to higher temperatures. High temperature means sound waves easily travel the distance in a much shoter time.

I have very small answers

The sound velocity is directly proportional to the increase in temperature because as the temperature increases the air molecules starts vibrating at higher amplitude thus making the travel of sound easier. Generally, the speed of sound in air increases with temperature.

the walls of our classroom are in rest with respect to the us.

Manures and fertilizersareused in fieldsto supply plant nutrients to the soil which increases soil fertility in order to ensure good vegetative growth that results in high crop production

Considering thesodiumion, which is represented by Na+, then it has avalencyof +1, having lost an electron. ... Of electrons in outer shell are called valence electrons and same is thevalency. Here no. of electrons in outer orbital is1so thevalency of sodium is 1.

unit vector have magnitude 1. It helps to specify direction

Infrared is the answer to the question

Solar radiation facilitates drying of wheat after harvesting.

We know that the acceleration due to gravity is equal to 9.8 m/s2, the Gravitational constant (G) is 6.673 × 10−11 Nm2/kg2, the radius of the Earth is 6.37 × 106 m, and mass cancels out.

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hydroelectricity

The definition of inexhaustible is something that cannot be used up, or has limitless energy.An example of inexhaustible is energy captured and stored from the sun.

ii)An inexhaustible resource is a resource that never runs out or gets depleted. Some of such resources include wind, sun, solar energy, tides, and geothermal energy. They are mostly the natural occurring resources hence they reappear naturallyii)A renewable resource is a substance of economic value that can be replaced or replenished in the same or less amount of time as it takes to draw the supply down.The five major renewable energy resources are solar, wind, water (hydro), biomass, and geothermal

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time period T = 1 ÷ frequency sec.

Wavelength = 2 cm.Number of waves produced per second = 15/3= 5.So Frequency = 5 Hz.

Speed of the wave = frequency* wavelength= 5 * 2 = 10 cm/sec.

time period T = 1 ÷ frequency sec.

Wavelength = 2 cm.Number of waves produced per second = 15/3= 5.So Frequency = 5 Hz.

Speed of the wave = frequency* wavelength= 5 * 2 = 10 cm/sec.

So time period for the pendulum to swing from extreme position to the center = 0.2 s + 0.2 s = 0.4 sec.

Time period = 4 * 0.4 = 1.6 sec.Frequency = 1/1.6 = 0.625 Hz

0.625. Hz is the correct answer of the given question

Initial velocity in downward direction will be same for both the particles and acceleration due to gravity will be same Working in downward direction so time of flight will also be equal